hi paul -

i always thought it would be so nice to have paulstretch as csound opcode!  i even had on my list to write him (paulnasca.com) to ask whether he would not be willing to implement it as csound opcode (as he did for audacity).

so — great to hear you are about to do so!  in cases of problems, i think paul might be willing to assist.

cheers -
        joachim

On 24/04/16 18:53, Paul Batchelor wrote:

Hello!

Yesterday, I managed to write my own C implementation of PaulStretch
based off the Python commandline implementation. It can be found in the
"dev" branch of Soundpipe:

https://github.com/PaulBatchelor/Soundpipe/blob/dev/modules/paulstretch.c

Here is a really small C example using my Soundpipe library:

https://github.com/PaulBatchelor/Soundpipe/blob/dev/examples/ex_paulstretch.c

My implementation takes something analogous to an ftable and then
"stretches" it out.

I think it would be neat to turn this into Csound Opcode! It would also
be a fun experience for me, as I've never written an opcode before.

The one complication that I see would be in the FFT library used. As far
as I can see, the internal Csound FFT algorithm only works with powers
of two. Paulstretch needs an FFT algorithm where you can have large
arbitrary FFT sizes (you specify window size in seconds). For my
implementation, I am using a small BSD licensed FFT library called
KissFFT, which could be dropped in along with the paulstretch code.
Would that be an okay solution?

Let me know what you guys think of this!

-P

Csound mailing list Csound@listserv.heanet.ie
<mailto:Csound@listserv.heanet.ie>
https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports to
https://github.com/csound/csound/issues Discussions of bugs and features
can be posted here

Csound mailing list
Csound@listserv.heanet.ie
https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND
Send bugs reports to
       https://github.com/csound/csound/issues
Discussions of bugs and features can be posted here

I don't think so. 

Victor Lazzarini

Dean of Arts, Celtic Studies, and Philosophy

Maynooth University

Ireland

On 25 Apr 2016, at 03:58, Paul Batchelor <ralphbluecoat@GMAIL.COM> wrote:

Victor: thanks for pointing me in the right direction. Is there an upper limit for how big the FFT size can be?

Joachim: I'll be sure to send you code your way as soon as I have something working. I'll be sure to contact paul if I run into any issues.

-P

On Sun, Apr 24, 2016 at 1:03 PM, joachim heintz <jh@joachimheintz.de> wrote:

hi paul -

i always thought it would be so nice to have paulstretch as csound opcode!  i even had on my list to write him (paulnasca.com) to ask whether he would not be willing to implement it as csound opcode (as he did for audacity).

so — great to hear you are about to do so!  in cases of problems, i think paul might be willing to assist.

cheers -
        joachim

On 24/04/16 18:53, Paul Batchelor wrote:

Hello!

Yesterday, I managed to write my own C implementation of PaulStretch
based off the Python commandline implementation. It can be found in the
"dev" branch of Soundpipe:

https://github.com/PaulBatchelor/Soundpipe/blob/dev/modules/paulstretch.c

Here is a really small C example using my Soundpipe library:

https://github.com/PaulBatchelor/Soundpipe/blob/dev/examples/ex_paulstretch.c

My implementation takes something analogous to an ftable and then
"stretches" it out.

I think it would be neat to turn this into Csound Opcode! It would also
be a fun experience for me, as I've never written an opcode before.

The one complication that I see would be in the FFT library used. As far
as I can see, the internal Csound FFT algorithm only works with powers
of two. Paulstretch needs an FFT algorithm where you can have large
arbitrary FFT sizes (you specify window size in seconds). For my
implementation, I am using a small BSD licensed FFT library called
KissFFT, which could be dropped in along with the paulstretch code.
Would that be an okay solution?

Let me know what you guys think of this!

-P

Csound mailing list Csound@listserv.heanet.ie
<mailto:Csound@listserv.heanet.ie>
https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports to
https://github.com/csound/csound/issues Discussions of bugs and features
can be posted here

Csound mailing list
Csound@listserv.heanet.ie
https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND
Send bugs reports to
       https://github.com/csound/csound/issues
Discussions of bugs and features can be posted here

Csound mailing list Csound@listserv.heanet.ie https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports to https://github.com/csound/csound/issues Discussions of bugs and features can be posted here

Csound mailing list Csound@listserv.heanet.ie https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports to https://github.com/csound/csound/issues Discussions of bugs and features can be posted here

Great:

1) Ftnp2Find() gives you access to tables of any size

2) Memory allocation: use AuxAlloc() as you

have probably seen in other Csound code

regards

Victor Lazzarini

Dean of Arts, Celtic Studies, and Philosophy

Maynooth University

Ireland

On 30 Apr 2016, at 07:45, Paul Batchelor <ralphbluecoat@GMAIL.COM> wrote:

Update:

I have successfully created an initial implementation of paulstretch using the internal FFT library. It can be found in my fork of Csound:

https://github.com/paulbatchelor/csound

Two things I'd like to figure out before I make a PR:

- How to use deferred ftables, if possible

- More defensive coding with memory allocation

- Try to solve the valgrind errors that I'm getting

I've also attached a test CSD, in case someone should want to try it out...

-P

On Sun, Apr 24, 2016 at 10:25 PM, Victor Lazzarini <Victor.Lazzarini@nuim.ie> wrote:

I don't think so. 

Victor Lazzarini

Dean of Arts, Celtic Studies, and Philosophy

Maynooth University

Ireland

On 25 Apr 2016, at 03:58, Paul Batchelor <ralphbluecoat@GMAIL.COM> wrote:

Victor: thanks for pointing me in the right direction. Is there an upper limit for how big the FFT size can be?

Joachim: I'll be sure to send you code your way as soon as I have something working. I'll be sure to contact paul if I run into any issues.

-P

On Sun, Apr 24, 2016 at 1:03 PM, joachim heintz <jh@joachimheintz.de> wrote:

hi paul -

i always thought it would be so nice to have paulstretch as csound opcode!  i even had on my list to write him (paulnasca.com) to ask whether he would not be willing to implement it as csound opcode (as he did for audacity).

so — great to hear you are about to do so!  in cases of problems, i think paul might be willing to assist.

cheers -
        joachim

On 24/04/16 18:53, Paul Batchelor wrote:

Hello!

Yesterday, I managed to write my own C implementation of PaulStretch
based off the Python commandline implementation. It can be found in the
"dev" branch of Soundpipe:

https://github.com/PaulBatchelor/Soundpipe/blob/dev/modules/paulstretch.c

Here is a really small C example using my Soundpipe library:

https://github.com/PaulBatchelor/Soundpipe/blob/dev/examples/ex_paulstretch.c

My implementation takes something analogous to an ftable and then
"stretches" it out.

I think it would be neat to turn this into Csound Opcode! It would also
be a fun experience for me, as I've never written an opcode before.

The one complication that I see would be in the FFT library used. As far
as I can see, the internal Csound FFT algorithm only works with powers
of two. Paulstretch needs an FFT algorithm where you can have large
arbitrary FFT sizes (you specify window size in seconds). For my
implementation, I am using a small BSD licensed FFT library called
KissFFT, which could be dropped in along with the paulstretch code.
Would that be an okay solution?

Let me know what you guys think of this!

-P

Csound mailing list Csound@listserv.heanet.ie
<mailto:Csound@listserv.heanet.ie>
https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports to
https://github.com/csound/csound/issues Discussions of bugs and features
can be posted here

Csound mailing list
Csound@listserv.heanet.ie
https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND
Send bugs reports to
       https://github.com/csound/csound/issues
Discussions of bugs and features can be posted here

Csound mailing list Csound@listserv.heanet.ie https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports to https://github.com/csound/csound/issues Discussions of bugs and features can be posted here

Csound mailing list Csound@listserv.heanet.ie https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports to https://github.com/csound/csound/issues Discussions of bugs and features can be posted here

Csound mailing list Csound@listserv.heanet.ie https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports to https://github.com/csound/csound/issues Discussions of bugs and features can be posted here

<test.csd>

Csound mailing list Csound@listserv.heanet.ie https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports to https://github.com/csound/csound/issues Discussions of bugs and features can be posted here

Any chance of seeing what valgrind says?

Sent from TypeApp

On 30 Apr 2016, at 18:47, Paul Batchelor <ralphbluecoat@GMAIL.COM> wrote:

Ftnp2Find works as intended.

I'm still getting Valgrind errors. I think it might be related to the FFT algorithms in mxfft.c, but I'm not sure.

On Fri, Apr 29, 2016 at 11:58 PM, Victor Lazzarini <Victor.Lazzarini@nuim.ie> wrote:

Great:

1) Ftnp2Find() gives you access to tables of any size

2) Memory allocation: use AuxAlloc() as you

have probably seen in other Csound code

regards

Victor Lazzarini

Dean of Arts, Celtic Studies, and Philosophy

Maynooth University

Ireland

On 30 Apr 2016, at 07:45, Paul Batchelor <ralphbluecoat@GMAIL.COM> wrote:

Update:

I have successfully created an initial implementation of paulstretch using the internal FFT library. It can be found in my fork of Csound:

https://github.com/paulbatchelor/csound

Two things I'd like to figure out before I make a PR:

- How to use deferred ftables, if possible

- More defensive coding with memory allocation

- Try to solve the valgrind errors that I'm getting

I've also attached a test CSD, in case someone should want to try it out...

-P

On Sun, Apr 24, 2016 at 10:25 PM, Victor Lazzarini <Victor.Lazzarini@nuim.ie> wrote:

I don't think so. 

Victor Lazzarini

Dean of Arts, Celtic Studies, and Philosophy

Maynooth University

Ireland

On 25 Apr 2016, at 03:58, Paul Batchelor <ralphbluecoat@GMAIL.COM> wrote:

Victor: thanks for pointing me in the right direction. Is there an upper limit for how big the FFT size can be?

Joachim: I'll be sure to send you code your way as soon as I have something working. I'll be sure to contact paul if I run into any issues.

-P

On Sun, Apr 24, 2016 at 1:03 PM, joachim heintz <jh@joachimheintz.de> wrote:

hi paul -

i always thought it would be so nice to have paulstretch as csound opcode!  i even had on my list to write him (paulnasca.com) to ask whether he would not be willing to implement it as csound opcode (as he did for audacity).

so — great to hear you are about to do so!  in cases of problems, i think paul might be willing to assist.

cheers -
        joachim

On 24/04/16 18:53, Paul Batchelor wrote:

Hello!

Yesterday, I managed to write my own C implementation of PaulStretch
based off the Python commandline implementation. It can be found in the
"dev" branch of Soundpipe:

https://github.com/PaulBatchelor/Soundpipe/blob/dev/modules/paulstretch.c

Here is a really small C example using my Soundpipe library:

https://github.com/PaulBatchelor/Soundpipe/blob/dev/examples/ex_paulstretch.c

My implementation takes something analogous to an ftable and then
"stretches" it out.

I think it would be neat to turn this into Csound Opcode! It would also
be a fun experience for me, as I've never written an opcode before.

The one complication that I see would be in the FFT library used. As far
as I can see, the internal Csound FFT algorithm only works with powers
of two. Paulstretch needs an FFT algorithm where you can have large
arbitrary FFT sizes (you specify window size in seconds). For my
implementation, I am using a small BSD licensed FFT library called
KissFFT, which could be dropped in along with the paulstretch code.
Would that be an okay solution?

Let me know what you guys think of this!

-P

Csound mailing list Csound@listserv.heanet.ie
<mailto:Csound@listserv.heanet.ie>
https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports to
https://github.com/csound/csound/issues Discussions of bugs and features
can be posted here

Csound mailing list
Csound@listserv.heanet.ie
https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND
Send bugs reports to
       https://github.com/csound/csound/issues
Discussions of bugs and features can be posted here

Csound mailing list Csound@listserv.heanet.ie https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports to https://github.com/csound/csound/issues Discussions of bugs and features can be posted here

Csound mailing list Csound@listserv.heanet.ie https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports to https://github.com/csound/csound/issues Discussions of bugs and features can be posted here

Csound mailing list Csound@listserv.heanet.ie https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports to https://github.com/csound/csound/issues Discussions of bugs and features can be posted here

<test.csd>

Csound mailing list Csound@listserv.heanet.ie https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports to https://github.com/csound/csound/issues Discussions of bugs and features can be posted here

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I posted the log above. But I fixed it. Just a misallocation on my end.

-P

On Sat, Apr 30, 2016 at 10:55 AM, John <jpff@codemist.co.uk> wrote:

Any chance of seeing what valgrind says?

Sent from TypeApp

On 30 Apr 2016, at 18:47, Paul Batchelor <ralphbluecoat@GMAIL.COM> wrote:

Ftnp2Find works as intended.

I'm still getting Valgrind errors. I think it might be related to the FFT algorithms in mxfft.c, but I'm not sure.

On Fri, Apr 29, 2016 at 11:58 PM, Victor Lazzarini <Victor.Lazzarini@nuim.ie> wrote:

Great:

1) Ftnp2Find() gives you access to tables of any size

2) Memory allocation: use AuxAlloc() as you

have probably seen in other Csound code

regards

Victor Lazzarini

Dean of Arts, Celtic Studies, and Philosophy

Maynooth University

Ireland

On 30 Apr 2016, at 07:45, Paul Batchelor <ralphbluecoat@GMAIL.COM> wrote:

Update:

I have successfully created an initial implementation of paulstretch using the internal FFT library. It can be found in my fork of Csound:

https://github.com/paulbatchelor/csound

Two things I'd like to figure out before I make a PR:

- How to use deferred ftables, if possible

- More defensive coding with memory allocation

- Try to solve the valgrind errors that I'm getting

I've also attached a test CSD, in case someone should want to try it out...

-P

On Sun, Apr 24, 2016 at 10:25 PM, Victor Lazzarini <Victor.Lazzarini@nuim.ie> wrote:

I don't think so. 

Victor Lazzarini

Dean of Arts, Celtic Studies, and Philosophy

Maynooth University

Ireland

On 25 Apr 2016, at 03:58, Paul Batchelor <ralphbluecoat@GMAIL.COM> wrote:

Victor: thanks for pointing me in the right direction. Is there an upper limit for how big the FFT size can be?

Joachim: I'll be sure to send you code your way as soon as I have something working. I'll be sure to contact paul if I run into any issues.

-P

On Sun, Apr 24, 2016 at 1:03 PM, joachim heintz <jh@joachimheintz.de> wrote:

hi paul -

i always thought it would be so nice to have paulstretch as csound opcode!  i even had on my list to write him (paulnasca.com) to ask whether he would not be willing to implement it as csound opcode (as he did for audacity).

so — great to hear you are about to do so!  in cases of problems, i think paul might be willing to assist.

cheers -
        joachim

On 24/04/16 18:53, Paul Batchelor wrote:

Hello!

Yesterday, I managed to write my own C implementation of PaulStretch
based off the Python commandline implementation. It can be found in the
"dev" branch of Soundpipe:

https://github.com/PaulBatchelor/Soundpipe/blob/dev/modules/paulstretch.c

Here is a really small C example using my Soundpipe library:

https://github.com/PaulBatchelor/Soundpipe/blob/dev/examples/ex_paulstretch.c

My implementation takes something analogous to an ftable and then
"stretches" it out.

I think it would be neat to turn this into Csound Opcode! It would also
be a fun experience for me, as I've never written an opcode before.

The one complication that I see would be in the FFT library used. As far
as I can see, the internal Csound FFT algorithm only works with powers
of two. Paulstretch needs an FFT algorithm where you can have large
arbitrary FFT sizes (you specify window size in seconds). For my
implementation, I am using a small BSD licensed FFT library called
KissFFT, which could be dropped in along with the paulstretch code.
Would that be an okay solution?

Let me know what you guys think of this!

-P

Csound mailing list Csound@listserv.heanet.ie
<mailto:Csound@listserv.heanet.ie>
https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports to
https://github.com/csound/csound/issues Discussions of bugs and features
can be posted here

Csound mailing list
Csound@listserv.heanet.ie
https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND
Send bugs reports to
       https://github.com/csound/csound/issues
Discussions of bugs and features can be posted here

Csound mailing list Csound@listserv.heanet.ie https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports to https://github.com/csound/csound/issues Discussions of bugs and features can be posted here

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<test.csd>

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I'll be very interested in trying this out, Paul. Thanks for working on it!

Two questions:

- Will it be possible (as it is in the original Paulstretch program) to contract the time period (i.e., by using values smaller than zero for the stretch factor)?

- Will the new opcode have the same windowing options as the original?

- Will the new opcode take an fsig as input, and output a new fsig?

Thanks,

Dave

On Sat, Apr 30, 2016 at 2:12 PM, Paul Batchelor <ralphbluecoat@gmail.com> wrote:

I posted the log above. But I fixed it. Just a misallocation on my end.

-P

On Sat, Apr 30, 2016 at 10:55 AM, John <jpff@codemist.co.uk> wrote:

Any chance of seeing what valgrind says?

Sent from TypeApp

On 30 Apr 2016, at 18:47, Paul Batchelor <ralphbluecoat@GMAIL.COM> wrote:

Ftnp2Find works as intended.

I'm still getting Valgrind errors. I think it might be related to the FFT algorithms in mxfft.c, but I'm not sure.

On Fri, Apr 29, 2016 at 11:58 PM, Victor Lazzarini <Victor.Lazzarini@nuim.ie> wrote:

Great:

1) Ftnp2Find() gives you access to tables of any size

2) Memory allocation: use AuxAlloc() as you

have probably seen in other Csound code

regards

Victor Lazzarini

Dean of Arts, Celtic Studies, and Philosophy

Maynooth University

Ireland

On 30 Apr 2016, at 07:45, Paul Batchelor <ralphbluecoat@GMAIL.COM> wrote:

Update:

I have successfully created an initial implementation of paulstretch using the internal FFT library. It can be found in my fork of Csound:

https://github.com/paulbatchelor/csound

Two things I'd like to figure out before I make a PR:

- How to use deferred ftables, if possible

- More defensive coding with memory allocation

- Try to solve the valgrind errors that I'm getting

I've also attached a test CSD, in case someone should want to try it out...

-P

On Sun, Apr 24, 2016 at 10:25 PM, Victor Lazzarini <Victor.Lazzarini@nuim.ie> wrote:

I don't think so. 

Victor Lazzarini

Dean of Arts, Celtic Studies, and Philosophy

Maynooth University

Ireland

On 25 Apr 2016, at 03:58, Paul Batchelor <ralphbluecoat@GMAIL.COM> wrote:

Victor: thanks for pointing me in the right direction. Is there an upper limit for how big the FFT size can be?

Joachim: I'll be sure to send you code your way as soon as I have something working. I'll be sure to contact paul if I run into any issues.

-P

On Sun, Apr 24, 2016 at 1:03 PM, joachim heintz <jh@joachimheintz.de> wrote:

hi paul -

i always thought it would be so nice to have paulstretch as csound opcode!  i even had on my list to write him (paulnasca.com) to ask whether he would not be willing to implement it as csound opcode (as he did for audacity).

so — great to hear you are about to do so!  in cases of problems, i think paul might be willing to assist.

cheers -
        joachim

On 24/04/16 18:53, Paul Batchelor wrote:

Hello!

Yesterday, I managed to write my own C implementation of PaulStretch
based off the Python commandline implementation. It can be found in the
"dev" branch of Soundpipe:

https://github.com/PaulBatchelor/Soundpipe/blob/dev/modules/paulstretch.c

Here is a really small C example using my Soundpipe library:

https://github.com/PaulBatchelor/Soundpipe/blob/dev/examples/ex_paulstretch.c

My implementation takes something analogous to an ftable and then
"stretches" it out.

I think it would be neat to turn this into Csound Opcode! It would also
be a fun experience for me, as I've never written an opcode before.

The one complication that I see would be in the FFT library used. As far
as I can see, the internal Csound FFT algorithm only works with powers
of two. Paulstretch needs an FFT algorithm where you can have large
arbitrary FFT sizes (you specify window size in seconds). For my
implementation, I am using a small BSD licensed FFT library called
KissFFT, which could be dropped in along with the paulstretch code.
Would that be an okay solution?

Let me know what you guys think of this!

-P

Csound mailing list Csound@listserv.heanet.ie
<mailto:Csound@listserv.heanet.ie>
https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports to
https://github.com/csound/csound/issues Discussions of bugs and features
can be posted here

Csound mailing list
Csound@listserv.heanet.ie
https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND
Send bugs reports to
       https://github.com/csound/csound/issues
Discussions of bugs and features can be posted here

Csound mailing list Csound@listserv.heanet.ie https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports to https://github.com/csound/csound/issues Discussions of bugs and features can be posted here

Csound mailing list Csound@listserv.heanet.ie https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports to https://github.com/csound/csound/issues Discussions of bugs and features can be posted here

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<test.csd>

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Wonderful news Paul.  Can't wait to check it out.  Cool.

On Sat, Apr 30, 2016 at 2:38 PM, Dave Seidel <dave.seidel@gmail.com> wrote:

I'll be very interested in trying this out, Paul. Thanks for working on it!

Two questions:

- Will it be possible (as it is in the original Paulstretch program) to contract the time period (i.e., by using values smaller than zero for the stretch factor)?

- Will the new opcode have the same windowing options as the original?

- Will the new opcode take an fsig as input, and output a new fsig?

Thanks,

Dave

On Sat, Apr 30, 2016 at 2:12 PM, Paul Batchelor <ralphbluecoat@gmail.com> wrote:

I posted the log above. But I fixed it. Just a misallocation on my end.

-P

On Sat, Apr 30, 2016 at 10:55 AM, John <jpff@codemist.co.uk> wrote:

Any chance of seeing what valgrind says?

Sent from TypeApp

On 30 Apr 2016, at 18:47, Paul Batchelor <ralphbluecoat@GMAIL.COM> wrote:

Ftnp2Find works as intended.

I'm still getting Valgrind errors. I think it might be related to the FFT algorithms in mxfft.c, but I'm not sure.

On Fri, Apr 29, 2016 at 11:58 PM, Victor Lazzarini <Victor.Lazzarini@nuim.ie> wrote:

Great:

1) Ftnp2Find() gives you access to tables of any size

2) Memory allocation: use AuxAlloc() as you

have probably seen in other Csound code

regards

Victor Lazzarini

Dean of Arts, Celtic Studies, and Philosophy

Maynooth University

Ireland

On 30 Apr 2016, at 07:45, Paul Batchelor <ralphbluecoat@GMAIL.COM> wrote:

Update:

I have successfully created an initial implementation of paulstretch using the internal FFT library. It can be found in my fork of Csound:

https://github.com/paulbatchelor/csound

Two things I'd like to figure out before I make a PR:

- How to use deferred ftables, if possible

- More defensive coding with memory allocation

- Try to solve the valgrind errors that I'm getting

I've also attached a test CSD, in case someone should want to try it out...

-P

On Sun, Apr 24, 2016 at 10:25 PM, Victor Lazzarini <Victor.Lazzarini@nuim.ie> wrote:

I don't think so. 

Victor Lazzarini

Dean of Arts, Celtic Studies, and Philosophy

Maynooth University

Ireland

On 25 Apr 2016, at 03:58, Paul Batchelor <ralphbluecoat@GMAIL.COM> wrote:

Victor: thanks for pointing me in the right direction. Is there an upper limit for how big the FFT size can be?

Joachim: I'll be sure to send you code your way as soon as I have something working. I'll be sure to contact paul if I run into any issues.

-P

On Sun, Apr 24, 2016 at 1:03 PM, joachim heintz <jh@joachimheintz.de> wrote:

hi paul -

i always thought it would be so nice to have paulstretch as csound opcode!  i even had on my list to write him (paulnasca.com) to ask whether he would not be willing to implement it as csound opcode (as he did for audacity).

so — great to hear you are about to do so!  in cases of problems, i think paul might be willing to assist.

cheers -
        joachim

On 24/04/16 18:53, Paul Batchelor wrote:

Hello!

Yesterday, I managed to write my own C implementation of PaulStretch
based off the Python commandline implementation. It can be found in the
"dev" branch of Soundpipe:

https://github.com/PaulBatchelor/Soundpipe/blob/dev/modules/paulstretch.c

Here is a really small C example using my Soundpipe library:

https://github.com/PaulBatchelor/Soundpipe/blob/dev/examples/ex_paulstretch.c

My implementation takes something analogous to an ftable and then
"stretches" it out.

I think it would be neat to turn this into Csound Opcode! It would also
be a fun experience for me, as I've never written an opcode before.

The one complication that I see would be in the FFT library used. As far
as I can see, the internal Csound FFT algorithm only works with powers
of two. Paulstretch needs an FFT algorithm where you can have large
arbitrary FFT sizes (you specify window size in seconds). For my
implementation, I am using a small BSD licensed FFT library called
KissFFT, which could be dropped in along with the paulstretch code.
Would that be an okay solution?

Let me know what you guys think of this!

-P

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--

_____________________________________________
Dr. Richard Boulanger
Professor of Electronic Production and Design
Professional Writing and Music Technology Division
Berklee College of Music

______________________________________________
President of Boulanger Labs - http://boulangerlabs.com
Author & Editor of The Csound Book - http://mitpress.mit.edu/books/csound-book
Author & Editor of The Audio Programming Book - http://mitpress.mit.edu/books/audio-programming-book
______________________________________________
about: http://www.boulangerlabs.com/about/richardboulanger/
about: http://www.csounds.com/community/developers/dr-richard-boulanger/
music: http://www.csounds.com/community/developers/dr-richard-boulanger/dr-richard-boulanger-music/

______________________________________________
email: rboulanger@berklee.edu
facebook: https://www.facebook.com/richard.boulanger.58

Csound mailing list Csound@listserv.heanet.ie https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports to https://github.com/csound/csound/issues Discussions of bugs and features can be posted here

Two answers:

- I *think* you might be able to use values smaller than 1 to contract the time period. You wouldn't use values smaller than 0 though.

- This paulstretch opcode uses only a hanning window. This is the one used in the commandline version of paulstretch built using python, which I used for reference.

- This does not use the FFT type in Csound, it just spits out an a-rate signal.

-P

On Sat, Apr 30, 2016 at 12:24 PM, Dr. Richard Boulanger <rboulanger@berklee.edu> wrote:

Wonderful news Paul.  Can't wait to check it out.  Cool.

On Sat, Apr 30, 2016 at 2:38 PM, Dave Seidel <dave.seidel@gmail.com> wrote:

I'll be very interested in trying this out, Paul. Thanks for working on it!

Two questions:

- Will it be possible (as it is in the original Paulstretch program) to contract the time period (i.e., by using values smaller than zero for the stretch factor)?

- Will the new opcode have the same windowing options as the original?

- Will the new opcode take an fsig as input, and output a new fsig?

Thanks,

Dave

On Sat, Apr 30, 2016 at 2:12 PM, Paul Batchelor <ralphbluecoat@gmail.com> wrote:

I posted the log above. But I fixed it. Just a misallocation on my end.

-P

On Sat, Apr 30, 2016 at 10:55 AM, John <jpff@codemist.co.uk> wrote:

Any chance of seeing what valgrind says?

Sent from TypeApp

On 30 Apr 2016, at 18:47, Paul Batchelor <ralphbluecoat@GMAIL.COM> wrote:

Ftnp2Find works as intended.

I'm still getting Valgrind errors. I think it might be related to the FFT algorithms in mxfft.c, but I'm not sure.

On Fri, Apr 29, 2016 at 11:58 PM, Victor Lazzarini <Victor.Lazzarini@nuim.ie> wrote:

Great:

1) Ftnp2Find() gives you access to tables of any size

2) Memory allocation: use AuxAlloc() as you

have probably seen in other Csound code

regards

Victor Lazzarini

Dean of Arts, Celtic Studies, and Philosophy

Maynooth University

Ireland

On 30 Apr 2016, at 07:45, Paul Batchelor <ralphbluecoat@GMAIL.COM> wrote:

Update:

I have successfully created an initial implementation of paulstretch using the internal FFT library. It can be found in my fork of Csound:

https://github.com/paulbatchelor/csound

Two things I'd like to figure out before I make a PR:

- How to use deferred ftables, if possible

- More defensive coding with memory allocation

- Try to solve the valgrind errors that I'm getting

I've also attached a test CSD, in case someone should want to try it out...

-P

On Sun, Apr 24, 2016 at 10:25 PM, Victor Lazzarini <Victor.Lazzarini@nuim.ie> wrote:

I don't think so. 

Victor Lazzarini

Dean of Arts, Celtic Studies, and Philosophy

Maynooth University

Ireland

On 25 Apr 2016, at 03:58, Paul Batchelor <ralphbluecoat@GMAIL.COM> wrote:

Victor: thanks for pointing me in the right direction. Is there an upper limit for how big the FFT size can be?

Joachim: I'll be sure to send you code your way as soon as I have something working. I'll be sure to contact paul if I run into any issues.

-P

On Sun, Apr 24, 2016 at 1:03 PM, joachim heintz <jh@joachimheintz.de> wrote:

hi paul -

i always thought it would be so nice to have paulstretch as csound opcode!  i even had on my list to write him (paulnasca.com) to ask whether he would not be willing to implement it as csound opcode (as he did for audacity).

so — great to hear you are about to do so!  in cases of problems, i think paul might be willing to assist.

cheers -
        joachim

On 24/04/16 18:53, Paul Batchelor wrote:

Hello!

Yesterday, I managed to write my own C implementation of PaulStretch
based off the Python commandline implementation. It can be found in the
"dev" branch of Soundpipe:

https://github.com/PaulBatchelor/Soundpipe/blob/dev/modules/paulstretch.c

Here is a really small C example using my Soundpipe library:

https://github.com/PaulBatchelor/Soundpipe/blob/dev/examples/ex_paulstretch.c

My implementation takes something analogous to an ftable and then
"stretches" it out.

I think it would be neat to turn this into Csound Opcode! It would also
be a fun experience for me, as I've never written an opcode before.

The one complication that I see would be in the FFT library used. As far
as I can see, the internal Csound FFT algorithm only works with powers
of two. Paulstretch needs an FFT algorithm where you can have large
arbitrary FFT sizes (you specify window size in seconds). For my
implementation, I am using a small BSD licensed FFT library called
KissFFT, which could be dropped in along with the paulstretch code.
Would that be an okay solution?

Let me know what you guys think of this!

-P

Csound mailing list Csound@listserv.heanet.ie
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https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports to
https://github.com/csound/csound/issues Discussions of bugs and features
can be posted here

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Send bugs reports to
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Discussions of bugs and features can be posted here

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--

_____________________________________________
Dr. Richard Boulanger
Professor of Electronic Production and Design
Professional Writing and Music Technology Division
Berklee College of Music

______________________________________________
President of Boulanger Labs - http://boulangerlabs.com
Author & Editor of The Csound Book - http://mitpress.mit.edu/books/csound-book
Author & Editor of The Audio Programming Book - http://mitpress.mit.edu/books/audio-programming-book
______________________________________________
about: http://www.boulangerlabs.com/about/richardboulanger/
about: http://www.csounds.com/community/developers/dr-richard-boulanger/
music: http://www.csounds.com/community/developers/dr-richard-boulanger/dr-richard-boulanger-music/

______________________________________________
email: rboulanger@berklee.edu
facebook: https://www.facebook.com/richard.boulanger.58

Csound mailing list Csound@listserv.heanet.ie https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports to https://github.com/csound/csound/issues Discussions of bugs and features can be posted here

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Another query.  Why are the stretch, windw size and table number optional efaulting to -1?  That is not in the manual and seems unnarural
==J>ohn

On Sun, 1 May 2016, Dave Seidel wrote:

Paul, thanks for the answers. Regarding windowing, I was thinking more of the
"window size" parameter. WIndow type is interesting too, thought I've only
used Hanning with the GUI version.
- Dave

On Sun, May 1, 2016 at 10:53 AM, Paul Batchelor <ralphbluecoat@gmail.com>
wrote:
      Two answers:

- I *think* you might be able to use values smaller than 1 to contract
the time period. You wouldn't use values smaller than 0 though.
- This paulstretch opcode uses only a hanning window. This is the one
used in the commandline version of paulstretch built using python, which
I used for reference.
- This does not use the FFT type in Csound, it just spits out an a-rate
signal.

-P

On Sat, Apr 30, 2016 at 12:24 PM, Dr. Richard Boulanger
<rboulanger@berklee.edu> wrote:
      Wonderful news Paul.  Can't wait to check it out.  Cool.

On Sat, Apr 30, 2016 at 2:38 PM, Dave Seidel
<dave.seidel@gmail.com> wrote:
      I'll be very interested in trying this out, Paul.
      Thanks for working on it!
Two questions:
- Will it be possible (as it is in the original Paulstretch
program) to contract the time period (i.e., by using values
smaller than zero for the stretch factor)?
- Will the new opcode have the same windowing options as the
original?
- Will the new opcode take an fsig as input, and output a
new fsig?

Thanks,
Dave

On Sat, Apr 30, 2016 at 2:12 PM, Paul Batchelor
<ralphbluecoat@gmail.com> wrote:
      I posted the log above. But I fixed it. Just a
      misallocation on my end.

-P

On Sat, Apr 30, 2016 at 10:55 AM, John
<jpff@codemist.co.uk> wrote:

      Any chance of seeing what valgrind says?

      Sent from TypeApp

      On 30 Apr 2016, at 18:47, Paul Batchelor
      <ralphbluecoat@GMAIL.COM> wrote:
            Ftnp2Find works as intended.

I'm still getting Valgrind errors. I think
it might be related to the FFT algorithms
in mxfft.c, but I'm not sure.





On Fri, Apr 29, 2016 at 11:58 PM, Victor
Lazzarini <Victor.Lazzarini@nuim.ie>
wrote:
      Great:

1) Ftnp2Find() gives you access to
tables of any size
2) Memory allocation: use AuxAlloc()
as you
have probably seen in other Csound
code

regards

Victor LazzariniDean of Arts, Celtic

Studies, and Philosophy
Maynooth University
Ireland

On 30 Apr 2016, at 07:45, Paul
Batchelor <ralphbluecoat@GMAIL.COM>
wrote:

      Update:

I have successfully created an
initial implementation of
paulstretch using the internal
FFT library. It can be found
in my fork of Csound:

https://github.com/paulbatchelor/csound

Two things I'd like to figure
out before I make a PR:

- How to use deferred ftables,
if possible
- More defensive coding with
memory allocation
- Try to solve the valgrind
errors that I'm getting


I've also attached a test CSD,
in case someone should want to
try it out...

-P

On Sun, Apr 24, 2016 at 10:25
PM, Victor Lazzarini
<Victor.Lazzarini@nuim.ie>
wrote:
      I don't think so. 

      Victor

      LazzariniDean of

      Arts, Celtic
      Studies, and
      Philosophy
Maynooth University
Ireland

On 25 Apr 2016, at
03:58, Paul Batchelor
<ralphbluecoat@GMAIL.COM>
wrote:

      Victor:
      thanks for
      pointing me
      in the right
      direction.
      Is there an
      upper limit
      for how big
      the FFT size
      can be?

      Joachim:
      I'll be sure
      to send you
      code your
      way as soon
      as I have
      something
      working.
      I'll be sure
      to contact
      paul if I
      run into any
      issues.

-P

On Sun, Apr 24,
2016 at 1:03 PM,
joachim heintz
<jh@joachimheintz.de>
wrote:
      hi
      paul -

      i
      always
      thought
      it
      would
      be so
      nice
      to
      have
      paulstretch
      as
      csound
      opcode! 
      i even
      had on
      my
      list
      to
      write
      him
      (paulnasca.com)
      to ask
      whether
      he
      would
      not be
      willing
      to
      implement
      it as
      csound
      opcode
      (as he
      did
      for
      audacity).

      so —
      great
      to
      hear
      you
      are
      about
      to do
      so! 
      in
      cases
      of
      problems,
      i
      think
      paul
      might
      be
      willing
      to
      assist.

      cheers
      -
           
       
      joachim


      On
      24/04/16
      18:53,
      Paul
      Batchelor
      wrote:
      Hello!

      Yesterday,
      I
      managed
      to
      write
      my
      own
      C
      implementation
      of
      PaulStretch
      based
      off
      the
      Python
      commandline
      implementation.
      It
      can
      be
      found
      in
      the
      "dev"
      branch
      of
      Soundpipe:

      https://github.com/PaulBatchelor/Soundpipe/blob/dev/modules/paulstretch.c

      Here
      is
      a
      really
      small
      C
      example
      using
      my
      Soundpipe
      library:

https://github.com/PaulBatchelor/Soundpipe/blob/dev/examples/ex_paulstretch.c


      My
      implementation
      takes
      something
      analogous
      to
      an
      ftable
      and
      then
      "stretches"
      it
      out.

      I
      think
      it
      would
      be
      neat
      to
      turn
      this
      into
      Csound
      Opcode!
      It
      would
      also
      be
      a
      fun
      experience
      for
      me,
      as
      I've
      never
      written
      an
      opcode
      before.

      The
      one
      complication
      that
      I
      see
      would
      be
      in
      the
      FFT
      library
      used.
      As
      far
      as
      I
      can
      see,
      the
      internal
      Csound
      FFT
      algorithm
      only
      works
      with
      powers
      of
      two.
      Paulstretch
      needs
      an
      FFT
      algorithm
      where
      you
      can
      have
      large
      arbitrary
      FFT
      sizes
      (you
      specify
      window
      size
      in
      seconds).
      For
      my
      implementation,
      I
      am
      using
      a
      small
      BSD
      licensed
      FFT
      library
      called
      KissFFT,
      which
      could
      be
      dropped
      in
      along
      with
      the
      paulstretch
      code.
      Would
      that
      be
      an
      okay
      solution?

      Let
      me
      know
      what
      you
      guys
      think
      of
      this!

      -P
Csound
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list
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reports
to
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--
_____________________________________________
Dr. Richard Boulanger
Professor of Electronic Production and Design
Professional Writing and Music Technology Division
Berklee College of Music
______________________________________________
President of Boulanger Labs - http://boulangerlabs.com
Author & Editor of The Csound Book -
http://mitpress.mit.edu/books/csound-book
Author & Editor of The Audio Programming Book -
http://mitpress.mit.edu/books/audio-programming-book
______________________________________________
about: http://www.boulangerlabs.com/about/richardboulanger/
about:
http://www.csounds.com/community/developers/dr-richard-boulanger/
music:http://www.csounds.com/community/developers/dr-richard-boulanger/dr-richard-b
oulanger-music/
______________________________________________
email: rboulanger@berklee.edu
facebook: https://www.facebook.com/richard.boulanger.58
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Discussions of bugs and features can be posted here

More answers:

- Yes, window size is most definitely an option!

- There is a sample program that's part of the manpage repo. I've attached it here for convenience.

- The reason why they are defaulting to -1 is because I implemented it wrong (sorry!). There are no default values. The Opcode entry should read "iii" instead of "jjj": https://github.com/csound/csound/blob/develop/Opcodes/paulstretch.c#L179

On Sun, May 1, 2016 at 9:18 AM, jpff <jpff@codemist.co.uk> wrote:

Another query.  Why are the stretch, windw size and table number optional efaulting to -1?  That is not in the manual and seems unnarural
==J>ohn

On Sun, 1 May 2016, Dave Seidel wrote:

Paul, thanks for the answers. Regarding windowing, I was thinking more of the
"window size" parameter. WIndow type is interesting too, thought I've only
used Hanning with the GUI version.
- Dave

On Sun, May 1, 2016 at 10:53 AM, Paul Batchelor <ralphbluecoat@gmail.com>
wrote:
      Two answers:

- I *think* you might be able to use values smaller than 1 to contract
the time period. You wouldn't use values smaller than 0 though.
- This paulstretch opcode uses only a hanning window. This is the one
used in the commandline version of paulstretch built using python, which
I used for reference.
- This does not use the FFT type in Csound, it just spits out an a-rate
signal.

-P

On Sat, Apr 30, 2016 at 12:24 PM, Dr. Richard Boulanger
<rboulanger@berklee.edu> wrote:
      Wonderful news Paul.  Can't wait to check it out.  Cool.

On Sat, Apr 30, 2016 at 2:38 PM, Dave Seidel
<dave.seidel@gmail.com> wrote:
      I'll be very interested in trying this out, Paul.
      Thanks for working on it!
Two questions:
- Will it be possible (as it is in the original Paulstretch
program) to contract the time period (i.e., by using values
smaller than zero for the stretch factor)?
- Will the new opcode have the same windowing options as the
original?
- Will the new opcode take an fsig as input, and output a
new fsig?

Thanks,
Dave

On Sat, Apr 30, 2016 at 2:12 PM, Paul Batchelor
<ralphbluecoat@gmail.com> wrote:
      I posted the log above. But I fixed it. Just a
      misallocation on my end.

-P

On Sat, Apr 30, 2016 at 10:55 AM, John
<jpff@codemist.co.uk> wrote:

      Any chance of seeing what valgrind says?

      Sent from TypeApp

      On 30 Apr 2016, at 18:47, Paul Batchelor
      <ralphbluecoat@GMAIL.COM> wrote:
            Ftnp2Find works as intended.

I'm still getting Valgrind errors. I think
it might be related to the FFT algorithms
in mxfft.c, but I'm not sure.





On Fri, Apr 29, 2016 at 11:58 PM, Victor
Lazzarini <Victor.Lazzarini@nuim.ie>
wrote:
      Great:

1) Ftnp2Find() gives you access to
tables of any size
2) Memory allocation: use AuxAlloc()
as you
have probably seen in other Csound
code

regards

Victor LazzariniDean of Arts, Celtic

Studies, and Philosophy
Maynooth University
Ireland

On 30 Apr 2016, at 07:45, Paul
Batchelor <ralphbluecoat@GMAIL.COM>
wrote:

      Update:

I have successfully created an
initial implementation of
paulstretch using the internal
FFT library. It can be found
in my fork of Csound:

https://github.com/paulbatchelor/csound

Two things I'd like to figure
out before I make a PR:

- How to use deferred ftables,
if possible
- More defensive coding with
memory allocation
- Try to solve the valgrind
errors that I'm getting


I've also attached a test CSD,
in case someone should want to
try it out...

-P

On Sun, Apr 24, 2016 at 10:25
PM, Victor Lazzarini
<Victor.Lazzarini@nuim.ie>
wrote:
      I don't think so. 

      Victor

      LazzariniDean of

      Arts, Celtic
      Studies, and
      Philosophy
Maynooth University
Ireland

On 25 Apr 2016, at
03:58, Paul Batchelor
<ralphbluecoat@GMAIL.COM>
wrote:

      Victor:
      thanks for
      pointing me
      in the right
      direction.
      Is there an
      upper limit
      for how big
      the FFT size
      can be?

      Joachim:
      I'll be sure
      to send you
      code your
      way as soon
      as I have
      something
      working.
      I'll be sure
      to contact
      paul if I
      run into any
      issues.

-P

On Sun, Apr 24,
2016 at 1:03 PM,
joachim heintz
<jh@joachimheintz.de>
wrote:
      hi
      paul -

      i
      always
      thought
      it
      would
      be so
      nice
      to
      have
      paulstretch
      as
      csound
      opcode! 
      i even
      had on
      my
      list
      to
      write
      him
      (paulnasca.com)
      to ask
      whether
      he
      would
      not be
      willing
      to
      implement
      it as
      csound
      opcode
      (as he
      did
      for
      audacity).

      so —
      great
      to
      hear
      you
      are
      about
      to do
      so! 
      in
      cases
      of
      problems,
      i
      think
      paul
      might
      be
      willing
      to
      assist.

      cheers
      -
           
       
      joachim


      On
      24/04/16
      18:53,
      Paul
      Batchelor
      wrote:
      Hello!

      Yesterday,
      I
      managed
      to
      write
      my
      own
      C
      implementation
      of
      PaulStretch
      based
      off
      the
      Python
      commandline
      implementation.
      It
      can
      be
      found
      in
      the
      "dev"
      branch
      of
      Soundpipe:

      https://github.com/PaulBatchelor/Soundpipe/blob/dev/modules/paulstretch.c

      Here
      is
      a
      really
      small
      C
      example
      using
      my
      Soundpipe
      library:

https://github.com/PaulBatchelor/Soundpipe/blob/dev/examples/ex_paulstretch.c


      My
      implementation
      takes
      something
      analogous
      to
      an
      ftable
      and
      then
      "stretches"
      it
      out.

      I
      think
      it
      would
      be
      neat
      to
      turn
      this
      into
      Csound
      Opcode!
      It
      would
      also
      be
      a
      fun
      experience
      for
      me,
      as
      I've
      never
      written
      an
      opcode
      before.

      The
      one
      complication
      that
      I
      see
      would
      be
      in
      the
      FFT
      library
      used.
      As
      far
      as
      I
      can
      see,
      the
      internal
      Csound
      FFT
      algorithm
      only
      works
      with
      powers
      of
      two.
      Paulstretch
      needs
      an
      FFT
      algorithm
      where
      you
      can
      have
      large
      arbitrary
      FFT
      sizes
      (you
      specify
      window
      size
      in
      seconds).
      For
      my
      implementation,
      I
      am
      using
      a
      small
      BSD
      licensed
      FFT
      library
      called
      KissFFT,
      which
      could
      be
      dropped
      in
      along
      with
      the
      paulstretch
      code.
      Would
      that
      be
      an
      okay
      solution?

      Let
      me
      know
      what
      you
      guys
      think
      of
      this!

      -P
Csound
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list
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      <test.csd>

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Discussions of bugs and features can be posted here




--
_____________________________________________
Dr. Richard Boulanger
Professor of Electronic Production and Design
Professional Writing and Music Technology Division
Berklee College of Music
______________________________________________
President of Boulanger Labs - http://boulangerlabs.com
Author & Editor of The Csound Book -
http://mitpress.mit.edu/books/csound-book
Author & Editor of The Audio Programming Book -
http://mitpress.mit.edu/books/audio-programming-book
______________________________________________
about: http://www.boulangerlabs.com/about/richardboulanger/
about:
http://www.csounds.com/community/developers/dr-richard-boulanger/
music:http://www.csounds.com/community/developers/dr-richard-boulanger/dr-richard-b
oulanger-music/
______________________________________________
email: rboulanger@berklee.edu
facebook: https://www.facebook.com/richard.boulanger.58
Csound mailing list Csound@listserv.heanet.ie
https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports
to https://github.com/csound/csound/issues Discussions of bugs and
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Can't wait for this opcode. (to do something else that stretching Justin Bieber for 24 hours) :-)

2016-05-01 19:55 GMT+02:00 Paul Batchelor <ralphbluecoat@gmail.com>:

More answers:

- Yes, window size is most definitely an option!

- There is a sample program that's part of the manpage repo. I've attached it here for convenience.

- The reason why they are defaulting to -1 is because I implemented it wrong (sorry!). There are no default values. The Opcode entry should read "iii" instead of "jjj": https://github.com/csound/csound/blob/develop/Opcodes/paulstretch.c#L179

On Sun, May 1, 2016 at 9:18 AM, jpff <jpff@codemist.co.uk> wrote:

Another query.  Why are the stretch, windw size and table number optional efaulting to -1?  That is not in the manual and seems unnarural
==J>ohn

On Sun, 1 May 2016, Dave Seidel wrote:

Paul, thanks for the answers. Regarding windowing, I was thinking more of the
"window size" parameter. WIndow type is interesting too, thought I've only
used Hanning with the GUI version.
- Dave

On Sun, May 1, 2016 at 10:53 AM, Paul Batchelor <ralphbluecoat@gmail.com>
wrote:
      Two answers:

- I *think* you might be able to use values smaller than 1 to contract
the time period. You wouldn't use values smaller than 0 though.
- This paulstretch opcode uses only a hanning window. This is the one
used in the commandline version of paulstretch built using python, which
I used for reference.
- This does not use the FFT type in Csound, it just spits out an a-rate
signal.

-P

On Sat, Apr 30, 2016 at 12:24 PM, Dr. Richard Boulanger
<rboulanger@berklee.edu> wrote:
      Wonderful news Paul.  Can't wait to check it out.  Cool.

On Sat, Apr 30, 2016 at 2:38 PM, Dave Seidel
<dave.seidel@gmail.com> wrote:
      I'll be very interested in trying this out, Paul.
      Thanks for working on it!
Two questions:
- Will it be possible (as it is in the original Paulstretch
program) to contract the time period (i.e., by using values
smaller than zero for the stretch factor)?
- Will the new opcode have the same windowing options as the
original?
- Will the new opcode take an fsig as input, and output a
new fsig?

Thanks,
Dave

On Sat, Apr 30, 2016 at 2:12 PM, Paul Batchelor
<ralphbluecoat@gmail.com> wrote:
      I posted the log above. But I fixed it. Just a
      misallocation on my end.

-P

On Sat, Apr 30, 2016 at 10:55 AM, John
<jpff@codemist.co.uk> wrote:

      Any chance of seeing what valgrind says?

      Sent from TypeApp

      On 30 Apr 2016, at 18:47, Paul Batchelor
      <ralphbluecoat@GMAIL.COM> wrote:
            Ftnp2Find works as intended.

I'm still getting Valgrind errors. I think
it might be related to the FFT algorithms
in mxfft.c, but I'm not sure.





On Fri, Apr 29, 2016 at 11:58 PM, Victor
Lazzarini <Victor.Lazzarini@nuim.ie>
wrote:
      Great:

1) Ftnp2Find() gives you access to
tables of any size
2) Memory allocation: use AuxAlloc()
as you
have probably seen in other Csound
code

regards

Victor LazzariniDean of Arts, Celtic

Studies, and Philosophy
Maynooth University
Ireland

On 30 Apr 2016, at 07:45, Paul
Batchelor <ralphbluecoat@GMAIL.COM>
wrote:

      Update:

I have successfully created an
initial implementation of
paulstretch using the internal
FFT library. It can be found
in my fork of Csound:

https://github.com/paulbatchelor/csound

Two things I'd like to figure
out before I make a PR:

- How to use deferred ftables,
if possible
- More defensive coding with
memory allocation
- Try to solve the valgrind
errors that I'm getting


I've also attached a test CSD,
in case someone should want to
try it out...

-P

On Sun, Apr 24, 2016 at 10:25
PM, Victor Lazzarini
<Victor.Lazzarini@nuim.ie>
wrote:
      I don't think so. 

      Victor

      LazzariniDean of

      Arts, Celtic
      Studies, and
      Philosophy
Maynooth University
Ireland

On 25 Apr 2016, at
03:58, Paul Batchelor
<ralphbluecoat@GMAIL.COM>
wrote:

      Victor:
      thanks for
      pointing me
      in the right
      direction.
      Is there an
      upper limit
      for how big
      the FFT size
      can be?

      Joachim:
      I'll be sure
      to send you
      code your
      way as soon
      as I have
      something
      working.
      I'll be sure
      to contact
      paul if I
      run into any
      issues.

-P

On Sun, Apr 24,
2016 at 1:03 PM,
joachim heintz
<jh@joachimheintz.de>
wrote:
      hi
      paul -

      i
      always
      thought
      it
      would
      be so
      nice
      to
      have
      paulstretch
      as
      csound
      opcode! 
      i even
      had on
      my
      list
      to
      write
      him
      (paulnasca.com)
      to ask
      whether
      he
      would
      not be
      willing
      to
      implement
      it as
      csound
      opcode
      (as he
      did
      for
      audacity).

      so —
      great
      to
      hear
      you
      are
      about
      to do
      so! 
      in
      cases
      of
      problems,
      i
      think
      paul
      might
      be
      willing
      to
      assist.

      cheers
      -
           
       
      joachim


      On
      24/04/16
      18:53,
      Paul
      Batchelor
      wrote:
      Hello!

      Yesterday,
      I
      managed
      to
      write
      my
      own
      C
      implementation
      of
      PaulStretch
      based
      off
      the
      Python
      commandline
      implementation.
      It
      can
      be
      found
      in
      the
      "dev"
      branch
      of
      Soundpipe:

      https://github.com/PaulBatchelor/Soundpipe/blob/dev/modules/paulstretch.c

      Here
      is
      a
      really
      small
      C
      example
      using
      my
      Soundpipe
      library:

https://github.com/PaulBatchelor/Soundpipe/blob/dev/examples/ex_paulstretch.c


      My
      implementation
      takes
      something
      analogous
      to
      an
      ftable
      and
      then
      "stretches"
      it
      out.

      I
      think
      it
      would
      be
      neat
      to
      turn
      this
      into
      Csound
      Opcode!
      It
      would
      also
      be
      a
      fun
      experience
      for
      me,
      as
      I've
      never
      written
      an
      opcode
      before.

      The
      one
      complication
      that
      I
      see
      would
      be
      in
      the
      FFT
      library
      used.
      As
      far
      as
      I
      can
      see,
      the
      internal
      Csound
      FFT
      algorithm
      only
      works
      with
      powers
      of
      two.
      Paulstretch
      needs
      an
      FFT
      algorithm
      where
      you
      can
      have
      large
      arbitrary
      FFT
      sizes
      (you
      specify
      window
      size
      in
      seconds).
      For
      my
      implementation,
      I
      am
      using
      a
      small
      BSD
      licensed
      FFT
      library
      called
      KissFFT,
      which
      could
      be
      dropped
      in
      along
      with
      the
      paulstretch
      code.
      Would
      that
      be
      an
      okay
      solution?

      Let
      me
      know
      what
      you
      guys
      think
      of
      this!

      -P
Csound
mailing
list
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to
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      <test.csd>

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posted here

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Discussions of bugs and features can be posted here




--
_____________________________________________
Dr. Richard Boulanger
Professor of Electronic Production and Design
Professional Writing and Music Technology Division
Berklee College of Music
______________________________________________
President of Boulanger Labs - http://boulangerlabs.com
Author & Editor of The Csound Book -
http://mitpress.mit.edu/books/csound-book
Author & Editor of The Audio Programming Book -
http://mitpress.mit.edu/books/audio-programming-book
______________________________________________
about: http://www.boulangerlabs.com/about/richardboulanger/
about:
http://www.csounds.com/community/developers/dr-richard-boulanger/
music:http://www.csounds.com/community/developers/dr-richard-boulanger/dr-richard-b
oulanger-music/
______________________________________________
email: rboulanger@berklee.edu
facebook: https://www.facebook.com/richard.boulanger.58
Csound mailing list Csound@listserv.heanet.ie
https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports
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hi paul -

i checked your example, but unfortunately it only produces noise for me (with fade in and fade out, but noise anyway).  can you check again? the csd which i used is pasted below.

best -
        joachim


<CsoundSynthesizer>
<CsOptions>
-o paulstretch.wav -W
</CsOptions>
<CsInstruments>
sr = 44100
ksmps = 32
0dbfs = 1
nchnls = 2

giwav ftgen 0, 0, 0, 1, "fox.wav", 0, 0, 1

instr 1
aout paulstretch 10, 2.0, giwav
outs aout, aout
endin

</CsInstruments>
<CsScore>
i1 0 30

</CsScore>
</CsoundSynthesizer>





On 30/04/16 08:45, Paul Batchelor wrote:

Update:

I have successfully created an initial implementation of paulstretch
using the internal FFT library. It can be found in my fork of Csound:

https://github.com/paulbatchelor/csound

Two things I'd like to figure out before I make a PR:

- How to use deferred ftables, if possible
- More defensive coding with memory allocation
- Try to solve the valgrind errors that I'm getting


I've also attached a test CSD, in case someone should want to try it out...

-P

On Sun, Apr 24, 2016 at 10:25 PM, Victor Lazzarini
<Victor.Lazzarini@nuim.ie <mailto:Victor.Lazzarini@nuim.ie>> wrote:

    I don't think so.

    Victor Lazzarini
    Dean of Arts, Celtic Studies, and Philosophy
    Maynooth University
    Ireland

    On 25 Apr 2016, at 03:58, Paul Batchelor <ralphbluecoat@GMAIL.COM
    <mailto:ralphbluecoat@gmail.com>> wrote:

    Victor: thanks for pointing me in the right direction. Is there an
    upper limit for how big the FFT size can be?

    Joachim: I'll be sure to send you code your way as soon as I have
    something working. I'll be sure to contact paul if I run into any
    issues.

    -P

    On Sun, Apr 24, 2016 at 1:03 PM, joachim heintz
    <jh@joachimheintz.de <mailto:jh@joachimheintz.de>> wrote:

        hi paul -

        i always thought it would be so nice to have paulstretch as
        csound opcode!  i even had on my list to write him
        (paulnasca.com <http://paulnasca.com>) to ask whether he would

        not be willing to implement it as csound opcode (as he did for
        audacity).

        so — great to hear you are about to do so!  in cases of
        problems, i think paul might be willing to assist.

        cheers -
                joachim



        On 24/04/16 18:53, Paul Batchelor wrote:

            Hello!

            Yesterday, I managed to write my own C implementation of
            PaulStretch
            based off the Python commandline implementation. It can be
            found in the
            "dev" branch of Soundpipe:

            https://github.com/PaulBatchelor/Soundpipe/blob/dev/modules/paulstretch.c

            Here is a really small C example using my Soundpipe library:

            https://github.com/PaulBatchelor/Soundpipe/blob/dev/examples/ex_paulstretch.c

            My implementation takes something analogous to an ftable
            and then
            "stretches" it out.

            I think it would be neat to turn this into Csound Opcode!
            It would also
            be a fun experience for me, as I've never written an
            opcode before.

            The one complication that I see would be in the FFT
            library used. As far
            as I can see, the internal Csound FFT algorithm only works
            with powers
            of two. Paulstretch needs an FFT algorithm where you can
            have large
            arbitrary FFT sizes (you specify window size in seconds).
            For my
            implementation, I am using a small BSD licensed FFT
            library called
            KissFFT, which could be dropped in along with the
            paulstretch code.
            Would that be an okay solution?

            Let me know what you guys think of this!

            -P
            Csound mailing list Csound@listserv.heanet.ie
            <mailto:Csound@listserv.heanet.ie>

            <mailto:Csound@listserv.heanet.ie
            <mailto:Csound@listserv.heanet.ie>>
            https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs
            reports to
            https://github.com/csound/csound/issues Discussions of
            bugs and features
            can be posted here


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        Csound@listserv.heanet.ie <mailto:Csound@listserv.heanet.ie>

        https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND
        Send bugs reports to
        https://github.com/csound/csound/issues
        Discussions of bugs and features can be posted here


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    <mailto:Csound@listserv.heanet.ie>
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    to https://github.com/csound/csound/issues Discussions of bugs and
    features can be posted here

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    features can be posted here


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Discussions of bugs and features can be posted here

change 2.0 to .2  or .5  or .1.  change 10 to 3 for now.

On Tue, May 3, 2016 at 12:47 PM, joachim heintz <jh@joachimheintz.de> wrote:

hi paul -

i checked your example, but unfortunately it only produces noise for me (with fade in and fade out, but noise anyway).  can you check again? the csd which i used is pasted below.

best -
        joachim


<CsoundSynthesizer>
<CsOptions>
-o paulstretch.wav -W
</CsOptions>
<CsInstruments>
sr = 44100
ksmps = 32
0dbfs = 1
nchnls = 2

giwav ftgen 0, 0, 0, 1, "fox.wav", 0, 0, 1

instr 1
aout paulstretch 10, 2.0, giwav
outs aout, aout
endin

</CsInstruments>
<CsScore>
i1 0 30

</CsScore>
</CsoundSynthesizer>





On 30/04/16 08:45, Paul Batchelor wrote:

Update:

I have successfully created an initial implementation of paulstretch
using the internal FFT library. It can be found in my fork of Csound:

https://github.com/paulbatchelor/csound

Two things I'd like to figure out before I make a PR:

- How to use deferred ftables, if possible
- More defensive coding with memory allocation
- Try to solve the valgrind errors that I'm getting


I've also attached a test CSD, in case someone should want to try it out...

-P

On Sun, Apr 24, 2016 at 10:25 PM, Victor Lazzarini
<Victor.Lazzarini@nuim.ie <mailto:Victor.Lazzarini@nuim.ie>> wrote:

    I don't think so.

    Victor Lazzarini
    Dean of Arts, Celtic Studies, and Philosophy
    Maynooth University
    Ireland

    On 25 Apr 2016, at 03:58, Paul Batchelor <ralphbluecoat@GMAIL.COM
    <mailto:ralphbluecoat@gmail.com>> wrote:

    Victor: thanks for pointing me in the right direction. Is there an
    upper limit for how big the FFT size can be?

    Joachim: I'll be sure to send you code your way as soon as I have
    something working. I'll be sure to contact paul if I run into any
    issues.

    -P

    On Sun, Apr 24, 2016 at 1:03 PM, joachim heintz
    <jh@joachimheintz.de <mailto:jh@joachimheintz.de>> wrote:

        hi paul -

        i always thought it would be so nice to have paulstretch as
        csound opcode!  i even had on my list to write him
        (paulnasca.com <http://paulnasca.com>) to ask whether he would

        not be willing to implement it as csound opcode (as he did for
        audacity).

        so — great to hear you are about to do so!  in cases of
        problems, i think paul might be willing to assist.

        cheers -
                joachim



        On 24/04/16 18:53, Paul Batchelor wrote:

            Hello!

            Yesterday, I managed to write my own C implementation of
            PaulStretch
            based off the Python commandline implementation. It can be
            found in the
            "dev" branch of Soundpipe:

            https://github.com/PaulBatchelor/Soundpipe/blob/dev/modules/paulstretch.c

            Here is a really small C example using my Soundpipe library:

            https://github.com/PaulBatchelor/Soundpipe/blob/dev/examples/ex_paulstretch.c

            My implementation takes something analogous to an ftable
            and then
            "stretches" it out.

            I think it would be neat to turn this into Csound Opcode!
            It would also
            be a fun experience for me, as I've never written an
            opcode before.

            The one complication that I see would be in the FFT
            library used. As far
            as I can see, the internal Csound FFT algorithm only works
            with powers
            of two. Paulstretch needs an FFT algorithm where you can
            have large
            arbitrary FFT sizes (you specify window size in seconds).
            For my
            implementation, I am using a small BSD licensed FFT
            library called
            KissFFT, which could be dropped in along with the
            paulstretch code.
            Would that be an okay solution?

            Let me know what you guys think of this!

            -P
            Csound mailing list Csound@listserv.heanet.ie
            <mailto:Csound@listserv.heanet.ie>

            <mailto:Csound@listserv.heanet.ie
            <mailto:Csound@listserv.heanet.ie>>
            https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs
            reports to
            https://github.com/csound/csound/issues Discussions of
            bugs and features
            can be posted here


        Csound mailing list
        Csound@listserv.heanet.ie <mailto:Csound@listserv.heanet.ie>

        https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND
        Send bugs reports to
        https://github.com/csound/csound/issues
        Discussions of bugs and features can be posted here


    Csound mailing list Csound@listserv.heanet.ie
    <mailto:Csound@listserv.heanet.ie>
    https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports
    to https://github.com/csound/csound/issues Discussions of bugs and
    features can be posted here

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Send bugs reports to
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Discussions of bugs and features can be posted here

--

_____________________________________________
Dr. Richard Boulanger
Professor of Electronic Production and Design
Professional Writing and Music Technology Division
Berklee College of Music

______________________________________________
President of Boulanger Labs - http://boulangerlabs.com
Author & Editor of The Csound Book - http://mitpress.mit.edu/books/csound-book
Author & Editor of The Audio Programming Book - http://mitpress.mit.edu/books/audio-programming-book
______________________________________________
about: http://www.boulangerlabs.com/about/richardboulanger/
about: http://www.csounds.com/community/developers/dr-richard-boulanger/
music: http://www.csounds.com/community/developers/dr-richard-boulanger/dr-richard-boulanger-music/

______________________________________________
email: rboulanger@berklee.edu
facebook: https://www.facebook.com/richard.boulanger.58

Csound mailing list Csound@listserv.heanet.ie https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports to https://github.com/csound/csound/issues Discussions of bugs and features can be posted here

Here's what it's supposed to sound like...

On Tue, May 3, 2016 at 1:52 PM, Dr. Richard Boulanger <rboulanger@berklee.edu> wrote:

change 2.0 to .2  or .5  or .1.  change 10 to 3 for now.

On Tue, May 3, 2016 at 12:47 PM, joachim heintz <jh@joachimheintz.de> wrote:

hi paul -

i checked your example, but unfortunately it only produces noise for me (with fade in and fade out, but noise anyway).  can you check again? the csd which i used is pasted below.

best -
        joachim


<CsoundSynthesizer>
<CsOptions>
-o paulstretch.wav -W
</CsOptions>
<CsInstruments>
sr = 44100
ksmps = 32
0dbfs = 1
nchnls = 2

giwav ftgen 0, 0, 0, 1, "fox.wav", 0, 0, 1

instr 1
aout paulstretch 10, 2.0, giwav
outs aout, aout
endin

</CsInstruments>
<CsScore>
i1 0 30

</CsScore>
</CsoundSynthesizer>





On 30/04/16 08:45, Paul Batchelor wrote:

Update:

I have successfully created an initial implementation of paulstretch
using the internal FFT library. It can be found in my fork of Csound:

https://github.com/paulbatchelor/csound

Two things I'd like to figure out before I make a PR:

- How to use deferred ftables, if possible
- More defensive coding with memory allocation
- Try to solve the valgrind errors that I'm getting


I've also attached a test CSD, in case someone should want to try it out...

-P

On Sun, Apr 24, 2016 at 10:25 PM, Victor Lazzarini
<Victor.Lazzarini@nuim.ie <mailto:Victor.Lazzarini@nuim.ie>> wrote:

    I don't think so.

    Victor Lazzarini
    Dean of Arts, Celtic Studies, and Philosophy
    Maynooth University
    Ireland

    On 25 Apr 2016, at 03:58, Paul Batchelor <ralphbluecoat@GMAIL.COM
    <mailto:ralphbluecoat@gmail.com>> wrote:

    Victor: thanks for pointing me in the right direction. Is there an
    upper limit for how big the FFT size can be?

    Joachim: I'll be sure to send you code your way as soon as I have
    something working. I'll be sure to contact paul if I run into any
    issues.

    -P

    On Sun, Apr 24, 2016 at 1:03 PM, joachim heintz
    <jh@joachimheintz.de <mailto:jh@joachimheintz.de>> wrote:

        hi paul -

        i always thought it would be so nice to have paulstretch as
        csound opcode!  i even had on my list to write him
        (paulnasca.com <http://paulnasca.com>) to ask whether he would

        not be willing to implement it as csound opcode (as he did for
        audacity).

        so — great to hear you are about to do so!  in cases of
        problems, i think paul might be willing to assist.

        cheers -
                joachim



        On 24/04/16 18:53, Paul Batchelor wrote:

            Hello!

            Yesterday, I managed to write my own C implementation of
            PaulStretch
            based off the Python commandline implementation. It can be
            found in the
            "dev" branch of Soundpipe:

            https://github.com/PaulBatchelor/Soundpipe/blob/dev/modules/paulstretch.c

            Here is a really small C example using my Soundpipe library:

            https://github.com/PaulBatchelor/Soundpipe/blob/dev/examples/ex_paulstretch.c

            My implementation takes something analogous to an ftable
            and then
            "stretches" it out.

            I think it would be neat to turn this into Csound Opcode!
            It would also
            be a fun experience for me, as I've never written an
            opcode before.

            The one complication that I see would be in the FFT
            library used. As far
            as I can see, the internal Csound FFT algorithm only works
            with powers
            of two. Paulstretch needs an FFT algorithm where you can
            have large
            arbitrary FFT sizes (you specify window size in seconds).
            For my
            implementation, I am using a small BSD licensed FFT
            library called
            KissFFT, which could be dropped in along with the
            paulstretch code.
            Would that be an okay solution?

            Let me know what you guys think of this!

            -P
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Berklee College of Music

______________________________________________
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I got that sound with the settings that I suggested.

With 2.0, it did not work for me either.

On Tue, May 3, 2016 at 6:58 PM, Paul Batchelor <ralphbluecoat@gmail.com> wrote:

Here's what it's supposed to sound like...

On Tue, May 3, 2016 at 1:52 PM, Dr. Richard Boulanger <rboulanger@berklee.edu> wrote:

change 2.0 to .2  or .5  or .1.  change 10 to 3 for now.

On Tue, May 3, 2016 at 12:47 PM, joachim heintz <jh@joachimheintz.de> wrote:

hi paul -

i checked your example, but unfortunately it only produces noise for me (with fade in and fade out, but noise anyway).  can you check again? the csd which i used is pasted below.

best -
        joachim


<CsoundSynthesizer>
<CsOptions>
-o paulstretch.wav -W
</CsOptions>
<CsInstruments>
sr = 44100
ksmps = 32
0dbfs = 1
nchnls = 2

giwav ftgen 0, 0, 0, 1, "fox.wav", 0, 0, 1

instr 1
aout paulstretch 10, 2.0, giwav
outs aout, aout
endin

</CsInstruments>
<CsScore>
i1 0 30

</CsScore>
</CsoundSynthesizer>





On 30/04/16 08:45, Paul Batchelor wrote:

Update:

I have successfully created an initial implementation of paulstretch
using the internal FFT library. It can be found in my fork of Csound:

https://github.com/paulbatchelor/csound

Two things I'd like to figure out before I make a PR:

- How to use deferred ftables, if possible
- More defensive coding with memory allocation
- Try to solve the valgrind errors that I'm getting


I've also attached a test CSD, in case someone should want to try it out...

-P

On Sun, Apr 24, 2016 at 10:25 PM, Victor Lazzarini
<Victor.Lazzarini@nuim.ie <mailto:Victor.Lazzarini@nuim.ie>> wrote:

    I don't think so.

    Victor Lazzarini
    Dean of Arts, Celtic Studies, and Philosophy
    Maynooth University
    Ireland

    On 25 Apr 2016, at 03:58, Paul Batchelor <ralphbluecoat@GMAIL.COM
    <mailto:ralphbluecoat@gmail.com>> wrote:

    Victor: thanks for pointing me in the right direction. Is there an
    upper limit for how big the FFT size can be?

    Joachim: I'll be sure to send you code your way as soon as I have
    something working. I'll be sure to contact paul if I run into any
    issues.

    -P

    On Sun, Apr 24, 2016 at 1:03 PM, joachim heintz
    <jh@joachimheintz.de <mailto:jh@joachimheintz.de>> wrote:

        hi paul -

        i always thought it would be so nice to have paulstretch as
        csound opcode!  i even had on my list to write him
        (paulnasca.com <http://paulnasca.com>) to ask whether he would

        not be willing to implement it as csound opcode (as he did for
        audacity).

        so — great to hear you are about to do so!  in cases of
        problems, i think paul might be willing to assist.

        cheers -
                joachim



        On 24/04/16 18:53, Paul Batchelor wrote:

            Hello!

            Yesterday, I managed to write my own C implementation of
            PaulStretch
            based off the Python commandline implementation. It can be
            found in the
            "dev" branch of Soundpipe:

            https://github.com/PaulBatchelor/Soundpipe/blob/dev/modules/paulstretch.c

            Here is a really small C example using my Soundpipe library:

            https://github.com/PaulBatchelor/Soundpipe/blob/dev/examples/ex_paulstretch.c

            My implementation takes something analogous to an ftable
            and then
            "stretches" it out.

            I think it would be neat to turn this into Csound Opcode!
            It would also
            be a fun experience for me, as I've never written an
            opcode before.

            The one complication that I see would be in the FFT
            library used. As far
            as I can see, the internal Csound FFT algorithm only works
            with powers
            of two. Paulstretch needs an FFT algorithm where you can
            have large
            arbitrary FFT sizes (you specify window size in seconds).
            For my
            implementation, I am using a small BSD licensed FFT
            library called
            KissFFT, which could be dropped in along with the
            paulstretch code.
            Would that be an okay solution?

            Let me know what you guys think of this!

            -P
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_____________________________________________
Dr. Richard Boulanger
Professor of Electronic Production and Design
Professional Writing and Music Technology Division
Berklee College of Music

______________________________________________
President of Boulanger Labs - http://boulangerlabs.com
Author & Editor of The Csound Book - http://mitpress.mit.edu/books/csound-book
Author & Editor of The Audio Programming Book - http://mitpress.mit.edu/books/audio-programming-book
______________________________________________
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_____________________________________________
Dr. Richard Boulanger
Professor of Electronic Production and Design
Professional Writing and Music Technology Division
Berklee College of Music

______________________________________________
President of Boulanger Labs - http://boulangerlabs.com
Author & Editor of The Csound Book - http://mitpress.mit.edu/books/csound-book
Author & Editor of The Audio Programming Book - http://mitpress.mit.edu/books/audio-programming-book
______________________________________________
about: http://www.boulangerlabs.com/about/richardboulanger/
about: http://www.csounds.com/community/developers/dr-richard-boulanger/
music: http://www.csounds.com/community/developers/dr-richard-boulanger/dr-richard-boulanger-music/

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i do get the desired sonic result with windowsize = 2, but as i am using
Linux and Jack i also get about 15 warning messages because of xrun errors.
A bit strange because paulstretch does not use a lot of CPU.

Great to have this opcode integrated in Csound!



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