Very good. 
Been following Mr Bilbao's work for sometime. 
Met him at AES 2011 convention in Hammersmith, London. 
Definite comes up with some good stuff, as usual. 
Very good. 



Thank you Steven, 
-PBS 


================================== 


--- stevenyi@GMAIL.COM wrote:

From:         Steven Yi 
To:           CSOUND@LISTSERV.HEANET.IE
Subject: [Csnd] Lockhart Wavefolder
Date:         Fri, 17 May 2019 22:22:36 -0400

Hi All,

I'd like to share a Csound UDO port of the “Virtual Analog Model of
the Lockhart Wavefolder” by Fabián Esqueda, Henri Pöntynen, Julian D.
Parker and Stefan Bilbao that was presented at SMC 2017. Information
about the original paper, links to the Csound UDO version, and example
audio available at:

https://kunstmusik.com/2019/05/17/lockhart-wavefolder/

The UDO port was a straightforward translation from the gen~ code
example found at the author's site:

http://research.spa.aalto.fi/publications/papers/smc17-wavefolder/

All credit to the original authors for their wonderful work!

All best,
Steven

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




_____________________________________________________________
Netscape.  Just the Net You Need.

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

Thanks all, hope you enjoy!

I'd mention I think the work was primarily by Fabián Esqueda and Henri
Pöntynen. (I love Stefan's work though!).  The authors also published
models for a Serge and Buchla wavefolders that might be interesting to
port as well. (Will take a look after some other work, unless someone
else goes for it first. :) )

On Sat, May 18, 2019 at 11:46 PM Partev Barr Sarkissian
 wrote:
>
>
> Very good.
> Been following Mr Bilbao's work for sometime.
> Met him at AES 2011 convention in Hammersmith, London.
> Definite comes up with some good stuff, as usual.
> Very good.
>
>
>
> Thank you Steven,
> -PBS
>
>
> ==================================
>
>
> --- stevenyi@GMAIL.COM wrote:
>
> From:         Steven Yi 
> To:           CSOUND@LISTSERV.HEANET.IE
> Subject: [Csnd] Lockhart Wavefolder
> Date:         Fri, 17 May 2019 22:22:36 -0400
>
> Hi All,
>
> I'd like to share a Csound UDO port of the “Virtual Analog Model of
> the Lockhart Wavefolder” by Fabián Esqueda, Henri Pöntynen, Julian D.
> Parker and Stefan Bilbao that was presented at SMC 2017. Information
> about the original paper, links to the Csound UDO version, and example
> audio available at:
>
> https://kunstmusik.com/2019/05/17/lockhart-wavefolder/
>
> The UDO port was a straightforward translation from the gen~ code
> example found at the author's site:
>
> http://research.spa.aalto.fi/publications/papers/smc17-wavefolder/
>
> All credit to the original authors for their wonderful work!
>
> All best,
> Steven
>
> 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
>
>
>
>
> _____________________________________________________________
> Netscape.  Just the Net You Need.
>
> 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
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Send bugs reports to
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Discussions of bugs and features can be posted here

Thanks for sharing Steven. I'm curious about using such a high
sampling rate, is this really more efficient than oversampling, or
just easier to implement? Did you see that in Bitwig's new modular
interface, all nodes run at 4x-oversampled?

On Mon, 20 May 2019 at 23:23, Steven Yi  wrote:
>
> Thanks all, hope you enjoy!
>
> I'd mention I think the work was primarily by Fabián Esqueda and Henri
> Pöntynen. (I love Stefan's work though!).  The authors also published
> models for a Serge and Buchla wavefolders that might be interesting to
> port as well. (Will take a look after some other work, unless someone
> else goes for it first. :) )
>
> On Sat, May 18, 2019 at 11:46 PM Partev Barr Sarkissian
>  wrote:
> >
> >
> > Very good.
> > Been following Mr Bilbao's work for sometime.
> > Met him at AES 2011 convention in Hammersmith, London.
> > Definite comes up with some good stuff, as usual.
> > Very good.
> >
> >
> >
> > Thank you Steven,
> > -PBS
> >
> >
> > ==================================
> >
> >
> > --- stevenyi@GMAIL.COM wrote:
> >
> > From:         Steven Yi 
> > To:           CSOUND@LISTSERV.HEANET.IE
> > Subject: [Csnd] Lockhart Wavefolder
> > Date:         Fri, 17 May 2019 22:22:36 -0400
> >
> > Hi All,
> >
> > I'd like to share a Csound UDO port of the “Virtual Analog Model of
> > the Lockhart Wavefolder” by Fabián Esqueda, Henri Pöntynen, Julian D.
> > Parker and Stefan Bilbao that was presented at SMC 2017. Information
> > about the original paper, links to the Csound UDO version, and example
> > audio available at:
> >
> > https://kunstmusik.com/2019/05/17/lockhart-wavefolder/
> >
> > The UDO port was a straightforward translation from the gen~ code
> > example found at the author's site:
> >
> > http://research.spa.aalto.fi/publications/papers/smc17-wavefolder/
> >
> > All credit to the original authors for their wonderful work!
> >
> > All best,
> > Steven
> >
> > 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
> >
> >
> >
> >
> > _____________________________________________________________
> > Netscape.  Just the Net You Need.
> >
> > 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
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Send bugs reports to
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Discussions of bugs and features can be posted here

That's interesting about the 4x-oversampled nodes, I hadn't been
following it.  I think the paper mentions 88.2 as 2x oversampling with
the antiderivative method as being sufficient compared to 4x and 8x
oversampling that might be done otherwise:

"To tackle the aliasing caused by the nonlinear nature of wavefolding,
the proposed model was extended to incorporate the firstorder
antiderivative antialiasing method. When combined with oversampling by
factor 2, the antialiased wavefolder model is free from perceivable
aliasing while still being suitable for real-time implementation."

You might try running it at 44100 and see if the sound quality works
for you. I *think* the Max patch demo was running at 44100 (a person
more experienced with Max/gen~ could confirm) and sounded okay to me,
same with the Csound example at 44100.




On Tue, May 21, 2019 at 5:02 AM Rory Walsh  wrote:
>
> Thanks for sharing Steven. I'm curious about using such a high
> sampling rate, is this really more efficient than oversampling, or
> just easier to implement? Did you see that in Bitwig's new modular
> interface, all nodes run at 4x-oversampled?
>
> On Mon, 20 May 2019 at 23:23, Steven Yi  wrote:
> >
> > Thanks all, hope you enjoy!
> >
> > I'd mention I think the work was primarily by Fabián Esqueda and Henri
> > Pöntynen. (I love Stefan's work though!).  The authors also published
> > models for a Serge and Buchla wavefolders that might be interesting to
> > port as well. (Will take a look after some other work, unless someone
> > else goes for it first. :) )
> >
> > On Sat, May 18, 2019 at 11:46 PM Partev Barr Sarkissian
> >  wrote:
> > >
> > >
> > > Very good.
> > > Been following Mr Bilbao's work for sometime.
> > > Met him at AES 2011 convention in Hammersmith, London.
> > > Definite comes up with some good stuff, as usual.
> > > Very good.
> > >
> > >
> > >
> > > Thank you Steven,
> > > -PBS
> > >
> > >
> > > ==================================
> > >
> > >
> > > --- stevenyi@GMAIL.COM wrote:
> > >
> > > From:         Steven Yi 
> > > To:           CSOUND@LISTSERV.HEANET.IE
> > > Subject: [Csnd] Lockhart Wavefolder
> > > Date:         Fri, 17 May 2019 22:22:36 -0400
> > >
> > > Hi All,
> > >
> > > I'd like to share a Csound UDO port of the “Virtual Analog Model of
> > > the Lockhart Wavefolder” by Fabián Esqueda, Henri Pöntynen, Julian D.
> > > Parker and Stefan Bilbao that was presented at SMC 2017. Information
> > > about the original paper, links to the Csound UDO version, and example
> > > audio available at:
> > >
> > > https://kunstmusik.com/2019/05/17/lockhart-wavefolder/
> > >
> > > The UDO port was a straightforward translation from the gen~ code
> > > example found at the author's site:
> > >
> > > http://research.spa.aalto.fi/publications/papers/smc17-wavefolder/
> > >
> > > All credit to the original authors for their wonderful work!
> > >
> > > All best,
> > > Steven
> > >
> > > 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
> > >
> > >
> > >
> > >
> > > _____________________________________________________________
> > > Netscape.  Just the Net You Need.
> > >
> > > 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
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Send bugs reports to
        https://github.com/csound/csound/issues
Discussions of bugs and features can be posted here

Yes, this was a topic from years ago that I'd love to have. I see that
SOUL lang has it built-in, though I haven't tried it.  (See
https://github.com/soul-lang/SOUL/blob/master/docs/SOUL_Language.md#processor-oversampling-and-undersampling).
The syntax is a bit quirky, but it does have the flexibility to run
choose interpolation types.  It'd be nice to have something either
like:

opcode test, a,a
  setoversampling(2, 0, 0) ;; set oversampling to 2x, 0 = Sinc interp
in, 0 = Sinc interp out

  asig xin
  aout init 0

  asig xout
endop

But that might not be as useful as being able to set oversampling from
the calling side of code. Perhaps something like:

instr Test
  asig = vco2(0.1, 440)

  aout @= [2,0,0] my_filter(asig)  ;; oversample by 2x, using sinc
interp for input, sinc interp for output
  aout @[2,0,0]= my_filter(asig)  ;; alternative syntax

endop

With csound inserting code to handle the oversampling processing on
the inputs and outputs of the opode call.  BTW, the above syntax
doesn't look great to me, but just speculating. We'd have to be very
careful about syntax so that we don't lose too much flexibility for
language design moving forward.




On Tue, May 21, 2019 at 9:50 AM Oeyvind Brandtsegg
 wrote:
>
> Very nice!
> and brings up the question of generic approaches to oversampling,
> that you also mentioned a few years back, Steven.
> I guess some internal methods would be much better optimised in terms of performance, compared to doing the oversampling in orc code.
>
> tir. 21. mai 2019 kl. 11:02 skrev Rory Walsh :
>>
>> Thanks for sharing Steven. I'm curious about using such a high
>> sampling rate, is this really more efficient than oversampling, or
>> just easier to implement? Did you see that in Bitwig's new modular
>> interface, all nodes run at 4x-oversampled?
>>
>> On Mon, 20 May 2019 at 23:23, Steven Yi  wrote:
>> >
>> > Thanks all, hope you enjoy!
>> >
>> > I'd mention I think the work was primarily by Fabián Esqueda and Henri
>> > Pöntynen. (I love Stefan's work though!).  The authors also published
>> > models for a Serge and Buchla wavefolders that might be interesting to
>> > port as well. (Will take a look after some other work, unless someone
>> > else goes for it first. :) )
>> >
>> > On Sat, May 18, 2019 at 11:46 PM Partev Barr Sarkissian
>> >  wrote:
>> > >
>> > >
>> > > Very good.
>> > > Been following Mr Bilbao's work for sometime.
>> > > Met him at AES 2011 convention in Hammersmith, London.
>> > > Definite comes up with some good stuff, as usual.
>> > > Very good.
>> > >
>> > >
>> > >
>> > > Thank you Steven,
>> > > -PBS
>> > >
>> > >
>> > > ==================================
>> > >
>> > >
>> > > --- stevenyi@GMAIL.COM wrote:
>> > >
>> > > From:         Steven Yi 
>> > > To:           CSOUND@LISTSERV.HEANET.IE
>> > > Subject: [Csnd] Lockhart Wavefolder
>> > > Date:         Fri, 17 May 2019 22:22:36 -0400
>> > >
>> > > Hi All,
>> > >
>> > > I'd like to share a Csound UDO port of the “Virtual Analog Model of
>> > > the Lockhart Wavefolder” by Fabián Esqueda, Henri Pöntynen, Julian D.
>> > > Parker and Stefan Bilbao that was presented at SMC 2017. Information
>> > > about the original paper, links to the Csound UDO version, and example
>> > > audio available at:
>> > >
>> > > https://kunstmusik.com/2019/05/17/lockhart-wavefolder/
>> > >
>> > > The UDO port was a straightforward translation from the gen~ code
>> > > example found at the author's site:
>> > >
>> > > http://research.spa.aalto.fi/publications/papers/smc17-wavefolder/
>> > >
>> > > All credit to the original authors for their wonderful work!
>> > >
>> > > All best,
>> > > Steven
>> > >
>> > > 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
>> > >
>> > >
>> > >
>> > >
>> > > _____________________________________________________________
>> > > Netscape.  Just the Net You Need.
>> > >
>> > > 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
>
>
>
> --
>
> Oeyvind Brandtsegg
> Professor of Music Technology
> NTNU
> 7491 Trondheim
> Norway
> Cell: +47 92 203 205
>
> http://www.partikkelaudio.com/
> http://crossadaptive.hf.ntnu.no
> http://gdsp.hf.ntnu.no/
> http://soundcloud.com/brandtsegg
> http://flyndresang.no/
> http://soundcloud.com/t-emp
>
> 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
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Send bugs reports to
        https://github.com/csound/csound/issues
Discussions of bugs and features can be posted here

I like the idea of enabling upsampling easily, like you suggest

But perhaps the requirement of doing it within an UDO is more inline with the practice of setksmps, which is a similar kind of context change?

best

Oeyvind

ons. 22. mai 2019 kl. 00:19 skrev Rory Walsh <rorywalsh@ear.ie>:

JUCE has oversampling modules so it's not really that surprising to see it in SOUL I guess. Did you try https://soul.dev/examples/ yet? 

On Tue 21 May 2019, 17:06 Steven Yi, <stevenyi@gmail.com> wrote:

Yes, this was a topic from years ago that I'd love to have. I see that
SOUL lang has it built-in, though I haven't tried it.  (See
https://github.com/soul-lang/SOUL/blob/master/docs/SOUL_Language.md#processor-oversampling-and-undersampling).
The syntax is a bit quirky, but it does have the flexibility to run
choose interpolation types.  It'd be nice to have something either
like:

opcode test, a,a
  setoversampling(2, 0, 0) ;; set oversampling to 2x, 0 = Sinc interp
in, 0 = Sinc interp out

  asig xin
  aout init 0

  asig xout
endop

But that might not be as useful as being able to set oversampling from
the calling side of code. Perhaps something like:

instr Test
  asig = vco2(0.1, 440)

  aout @= [2,0,0] my_filter(asig)  ;; oversample by 2x, using sinc
interp for input, sinc interp for output
  aout @[2,0,0]= my_filter(asig)  ;; alternative syntax

endop

With csound inserting code to handle the oversampling processing on
the inputs and outputs of the opode call.  BTW, the above syntax
doesn't look great to me, but just speculating. We'd have to be very
careful about syntax so that we don't lose too much flexibility for
language design moving forward.




On Tue, May 21, 2019 at 9:50 AM Oeyvind Brandtsegg
<oyvind.brandtsegg@ntnu.no> wrote:
>
> Very nice!
> and brings up the question of generic approaches to oversampling,
> that you also mentioned a few years back, Steven.
> I guess some internal methods would be much better optimised in terms of performance, compared to doing the oversampling in orc code.
>
> tir. 21. mai 2019 kl. 11:02 skrev Rory Walsh <rorywalsh@ear.ie>:
>>
>> Thanks for sharing Steven. I'm curious about using such a high
>> sampling rate, is this really more efficient than oversampling, or
>> just easier to implement? Did you see that in Bitwig's new modular
>> interface, all nodes run at 4x-oversampled?
>>
>> On Mon, 20 May 2019 at 23:23, Steven Yi <stevenyi@gmail.com> wrote:
>> >
>> > Thanks all, hope you enjoy!
>> >
>> > I'd mention I think the work was primarily by Fabián Esqueda and Henri
>> > Pöntynen. (I love Stefan's work though!).  The authors also published
>> > models for a Serge and Buchla wavefolders that might be interesting to
>> > port as well. (Will take a look after some other work, unless someone
>> > else goes for it first. :) )
>> >
>> > On Sat, May 18, 2019 at 11:46 PM Partev Barr Sarkissian
>> > <encino_man@netscape.com> wrote:
>> > >
>> > >
>> > > Very good.
>> > > Been following Mr Bilbao's work for sometime.
>> > > Met him at AES 2011 convention in Hammersmith, London.
>> > > Definite comes up with some good stuff, as usual.
>> > > Very good.
>> > >
>> > >
>> > >
>> > > Thank you Steven,
>> > > -PBS
>> > >
>> > >
>> > > ==================================
>> > >
>> > >
>> > > --- stevenyi@GMAIL.COM wrote:
>> > >
>> > > From:         Steven Yi <stevenyi@GMAIL.COM>
>> > > To:           CSOUND@LISTSERV.HEANET.IE
>> > > Subject: [Csnd] Lockhart Wavefolder
>> > > Date:         Fri, 17 May 2019 22:22:36 -0400
>> > >
>> > > Hi All,
>> > >
>> > > I'd like to share a Csound UDO port of the “Virtual Analog Model of
>> > > the Lockhart Wavefolder” by Fabián Esqueda, Henri Pöntynen, Julian D.
>> > > Parker and Stefan Bilbao that was presented at SMC 2017. Information
>> > > about the original paper, links to the Csound UDO version, and example
>> > > audio available at:
>> > >
>> > > https://kunstmusik.com/2019/05/17/lockhart-wavefolder/
>> > >
>> > > The UDO port was a straightforward translation from the gen~ code
>> > > example found at the author's site:
>> > >
>> > > http://research.spa.aalto.fi/publications/papers/smc17-wavefolder/
>> > >
>> > > All credit to the original authors for their wonderful work!
>> > >
>> > > All best,
>> > > Steven
>> > >
>> > > 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
>> > >
>> > >
>> > >
>> > >
>> > > _____________________________________________________________
>> > > Netscape.  Just the Net You Need.
>> > >
>> > > 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
>
>
>
> --
>
> Oeyvind Brandtsegg
> Professor of Music Technology
> NTNU
> 7491 Trondheim
> Norway
> Cell: +47 92 203 205
>
> http://www.partikkelaudio.com/
> http://crossadaptive.hf.ntnu.no
> http://gdsp.hf.ntnu.no/
> http://soundcloud.com/brandtsegg
> http://flyndresang.no/
> http://soundcloud.com/t-emp
>
> 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

--

Oeyvind Brandtsegg
Professor of Music Technology
NTNU
7491 Trondheim
Norway
Cell: +47 92 203 205

http://www.partikkelaudio.com/
http://crossadaptive.hf.ntnu.no
http://gdsp.hf.ntnu.no/
http://soundcloud.com/brandtsegg
http://flyndresang.no/
http://soundcloud.com/t-emp
 

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