Hi All,

Continuing on in the work to translate Will Pirkle's filter code, I
have done translations of the Korg35 low-pass and high-pass filters
(found in the MS-10 and MS-20).  They are available at:

https://github.com/kunstmusik/libsyi/blob/master/k35.udo
https://github.com/kunstmusik/libsyi/blob/master/tests/k35.csd

These are based on the filter code presented in Pirkle's app notes:

http://www.willpirkle.com/Downloads/AN-5Korg35_V3.pdf
http://www.willpirkle.com/Downloads/AN-7Korg35HPF_V2.pdf

The k35_lpf is a 12 dB/oct low pass filter and the k35_hpf is a 6
dB/oct high pass.  Both can self-oscillate.

The test CSD example starts with a demo filter sweep of both versions
of both filters with high resonance (the filters have a-rate and
k-rate versions of the cutoff). Afterwards, I did some live coding in
Vim to put together a little bit of a beat.  There are two instruments
both using the k35 filters (ms20_drum and ms20_bass).  The former uses
a bit of tanh distortion to get a grittier sound, the latter is a
little more straightforward.  (The distortion is done outside of the
filters; I haven't had a chance to explore the internal non-linear
processing tanh distortion much, but the small bits I did yielded
interesting sound using >= 2 for saturation.) There are two player
instruments using temporal recursion to play the drum beat as well as
a bass line that uses a bit of randomness.

Enjoy!
steven

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I'd be happy to see these filters done in C, though I rather like
being able to write, study, use these as Csound ORC code as well.

I think if it does get put into C, it might be good to revisit all of
the Q/Resonance settings between the filters and choose a single way
to go about it (I think I might have used different ones for different
filters).  Also, the mapping of the argument might be good to revisit
(i.e., check if a logarithmic value would be better, or just let that
be a user thing to do).  If these do get translated to C, I'd
recommend whomever is doing it to double-check with Pirkle's C++ code
(I've gone and checked a few times, but you never know!).

Rory: perhaps file an issue and place it in the 6.0x milestone?

On Tue, Nov 29, 2016 at 11:03 AM, jpff <jpff@codemist.co.uk> wrote:
> Make an issue saying which filters.  Not sure about the other developers but
> i need something to do over the Christmas break
>
>
> On Tue, 29 Nov 2016, Rory Walsh wrote:
>
>> Excellent work Steven. These are great. I would like to see them as
>> opcodes
>> too, just so we don't have to keep importing the UDOs into our projects.
>>
>> On 29 November 2016 at 15:12, Steven Yi <stevenyi@gmail.com> wrote:
>>       Hi All,
>>
>>       Continuing on in the work to translate Will Pirkle's filter code,
>>       I
>>       have done translations of the Korg35 low-pass and high-pass
>>       filters
>>       (found in the MS-10 and MS-20).  They are available at:
>>
>>       https://github.com/kunstmusik/libsyi/blob/master/k35.udo
>>       https://github.com/kunstmusik/libsyi/blob/master/tests/k35.csd
>>
>>       These are based on the filter code presented in Pirkle's app
>>       notes:
>>
>>       http://www.willpirkle.com/Downloads/AN-5Korg35_V3.pdf
>>       http://www.willpirkle.com/Downloads/AN-7Korg35HPF_V2.pdf
>>
>>       The k35_lpf is a 12 dB/oct low pass filter and the k35_hpf is a 6
>>       dB/oct high pass.  Both can self-oscillate.
>>
>>       The test CSD example starts with a demo filter sweep of both
>>       versions
>>       of both filters with high resonance (the filters have a-rate and
>>       k-rate versions of the cutoff). Afterwards, I did some live coding
>>       in
>>       Vim to put together a little bit of a beat.  There are two
>>       instruments
>>       both using the k35 filters (ms20_drum and ms20_bass).  The former
>>       uses
>>       a bit of tanh distortion to get a grittier sound, the latter is a
>>       little more straightforward.  (The distortion is done outside of
>>       the
>>       filters; I haven't had a chance to explore the internal non-linear
>>       processing tanh distortion much, but the small bits I did yielded
>>       interesting sound using >= 2 for saturation.) There are two player
>>       instruments using temporal recursion to play the drum beat as well
>>       as
>>       a bass line that uses a bit of randomness.
>>
>>       Enjoy!
>>       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
>>
>>
>> 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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Discussions of bugs and features can be posted here

Thanks Steven! A filter is a vital part of any synthesizer. So every new hi-quality filter

expands the power of the synth dramatically.

2016-11-29 20:11 GMT+03:00 Steven Yi <stevenyi@gmail.com>:

I'd be happy to see these filters done in C, though I rather like
being able to write, study, use these as Csound ORC code as well.

I think if it does get put into C, it might be good to revisit all of
the Q/Resonance settings between the filters and choose a single way
to go about it (I think I might have used different ones for different
filters).  Also, the mapping of the argument might be good to revisit
(i.e., check if a logarithmic value would be better, or just let that
be a user thing to do).  If these do get translated to C, I'd
recommend whomever is doing it to double-check with Pirkle's C++ code
(I've gone and checked a few times, but you never know!).

Rory: perhaps file an issue and place it in the 6.0x milestone?

On Tue, Nov 29, 2016 at 11:03 AM, jpff <jpff@codemist.co.uk> wrote:
> Make an issue saying which filters.  Not sure about the other developers but
> i need something to do over the Christmas break
>
>
> On Tue, 29 Nov 2016, Rory Walsh wrote:
>
>> Excellent work Steven. These are great. I would like to see them as
>> opcodes
>> too, just so we don't have to keep importing the UDOs into our projects.
>>
>> On 29 November 2016 at 15:12, Steven Yi <stevenyi@gmail.com> wrote:
>>       Hi All,
>>
>>       Continuing on in the work to translate Will Pirkle's filter code,
>>       I
>>       have done translations of the Korg35 low-pass and high-pass
>>       filters
>>       (found in the MS-10 and MS-20).  They are available at:
>>
>>       https://github.com/kunstmusik/libsyi/blob/master/k35.udo
>>       https://github.com/kunstmusik/libsyi/blob/master/tests/k35.csd
>>
>>       These are based on the filter code presented in Pirkle's app
>>       notes:
>>
>>       http://www.willpirkle.com/Downloads/AN-5Korg35_V3.pdf
>>       http://www.willpirkle.com/Downloads/AN-7Korg35HPF_V2.pdf
>>
>>       The k35_lpf is a 12 dB/oct low pass filter and the k35_hpf is a 6
>>       dB/oct high pass.  Both can self-oscillate.
>>
>>       The test CSD example starts with a demo filter sweep of both
>>       versions
>>       of both filters with high resonance (the filters have a-rate and
>>       k-rate versions of the cutoff). Afterwards, I did some live coding
>>       in
>>       Vim to put together a little bit of a beat.  There are two
>>       instruments
>>       both using the k35 filters (ms20_drum and ms20_bass).  The former
>>       uses
>>       a bit of tanh distortion to get a grittier sound, the latter is a
>>       little more straightforward.  (The distortion is done outside of
>>       the
>>       filters; I haven't had a chance to explore the internal non-linear
>>       processing tanh distortion much, but the small bits I did yielded
>>       interesting sound using >= 2 for saturation.) There are two player
>>       instruments using temporal recursion to play the drum beat as well
>>       as
>>       a bass line that uses a bit of randomness.
>>
>>       Enjoy!
>>       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
>>
>>
>> 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

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

Hi All,

Continuing on in the work to translate Will Pirkle's filter code, I
have done translations of the Korg35 low-pass and high-pass filters
(found in the MS-10 and MS-20).  They are available at:

https://github.com/kunstmusik/libsyi/blob/master/k35.udo
https://github.com/kunstmusik/libsyi/blob/master/tests/k35.csd

These are based on the filter code presented in Pirkle's app notes:

http://www.willpirkle.com/Downloads/AN-5Korg35_V3.pdf
http://www.willpirkle.com/Downloads/AN-7Korg35HPF_V2.pdf

The k35_lpf is a 12 dB/oct low pass filter and the k35_hpf is a 6
dB/oct high pass.  Both can self-oscillate.

The test CSD example starts with a demo filter sweep of both versions
of both filters with high resonance (the filters have a-rate and
k-rate versions of the cutoff). Afterwards, I did some live coding in
Vim to put together a little bit of a beat.  There are two instruments
both using the k35 filters (ms20_drum and ms20_bass).  The former uses
a bit of tanh distortion to get a grittier sound, the latter is a
little more straightforward.  (The distortion is done outside of the
filters; I haven't had a chance to explore the internal non-linear
processing tanh distortion much, but the small bits I did yielded
interesting sound using >= 2 for saturation.) There are two player
instruments using temporal recursion to play the drum beat as well as
a bass line that uses a bit of randomness.

Enjoy!
steven

Csound mailing list
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Thanks all!

I have a few more filters to do within the zdf.udo file (should be
apparent which ones near the end aren't yet implemented).  After that,
probably a bit of a break to spend time exploring using all these and
perhaps getting back to some sample-related interests. :)

On Tue, Nov 29, 2016 at 3:43 PM, Rory Walsh <rorywalsh@ear.ie> wrote:
> I just filed an issue there Steven. I agree that it's great to have these as
> UDOs too, and they make great teaching tools. But I think they should also
> be in the main body of opcodes. What's next? You're on a roll!
>
> On 29 November 2016 at 19:08, Anton Kholomiov <anton.kholomiov@gmail.com>
> wrote:
>>
>> Thanks Steven! A filter is a vital part of any synthesizer. So every new
>> hi-quality filter
>> expands the power of the synth dramatically.
>>
>>
>> 2016-11-29 20:11 GMT+03:00 Steven Yi <stevenyi@gmail.com>:
>>>
>>> I'd be happy to see these filters done in C, though I rather like
>>> being able to write, study, use these as Csound ORC code as well.
>>>
>>> I think if it does get put into C, it might be good to revisit all of
>>> the Q/Resonance settings between the filters and choose a single way
>>> to go about it (I think I might have used different ones for different
>>> filters).  Also, the mapping of the argument might be good to revisit
>>> (i.e., check if a logarithmic value would be better, or just let that
>>> be a user thing to do).  If these do get translated to C, I'd
>>> recommend whomever is doing it to double-check with Pirkle's C++ code
>>> (I've gone and checked a few times, but you never know!).
>>>
>>> Rory: perhaps file an issue and place it in the 6.0x milestone?
>>>
>>> On Tue, Nov 29, 2016 at 11:03 AM, jpff <jpff@codemist.co.uk> wrote:
>>> > Make an issue saying which filters.  Not sure about the other
>>> > developers but
>>> > i need something to do over the Christmas break
>>> >
>>> >
>>> > On Tue, 29 Nov 2016, Rory Walsh wrote:
>>> >
>>> >> Excellent work Steven. These are great. I would like to see them as
>>> >> opcodes
>>> >> too, just so we don't have to keep importing the UDOs into our
>>> >> projects.
>>> >>
>>> >> On 29 November 2016 at 15:12, Steven Yi <stevenyi@gmail.com> wrote:
>>> >>       Hi All,
>>> >>
>>> >>       Continuing on in the work to translate Will Pirkle's filter
>>> >> code,
>>> >>       I
>>> >>       have done translations of the Korg35 low-pass and high-pass
>>> >>       filters
>>> >>       (found in the MS-10 and MS-20).  They are available at:
>>> >>
>>> >>       https://github.com/kunstmusik/libsyi/blob/master/k35.udo
>>> >>       https://github.com/kunstmusik/libsyi/blob/master/tests/k35.csd
>>> >>
>>> >>       These are based on the filter code presented in Pirkle's app
>>> >>       notes:
>>> >>
>>> >>       http://www.willpirkle.com/Downloads/AN-5Korg35_V3.pdf
>>> >>       http://www.willpirkle.com/Downloads/AN-7Korg35HPF_V2.pdf
>>> >>
>>> >>       The k35_lpf is a 12 dB/oct low pass filter and the k35_hpf is a
>>> >> 6
>>> >>       dB/oct high pass.  Both can self-oscillate.
>>> >>
>>> >>       The test CSD example starts with a demo filter sweep of both
>>> >>       versions
>>> >>       of both filters with high resonance (the filters have a-rate and
>>> >>       k-rate versions of the cutoff). Afterwards, I did some live
>>> >> coding
>>> >>       in
>>> >>       Vim to put together a little bit of a beat.  There are two
>>> >>       instruments
>>> >>       both using the k35 filters (ms20_drum and ms20_bass).  The
>>> >> former
>>> >>       uses
>>> >>       a bit of tanh distortion to get a grittier sound, the latter is
>>> >> a
>>> >>       little more straightforward.  (The distortion is done outside of
>>> >>       the
>>> >>       filters; I haven't had a chance to explore the internal
>>> >> non-linear
>>> >>       processing tanh distortion much, but the small bits I did
>>> >> yielded
>>> >>       interesting sound using >= 2 for saturation.) There are two
>>> >> player
>>> >>       instruments using temporal recursion to play the drum beat as
>>> >> well
>>> >>       as
>>> >>       a bass line that uses a bit of randomness.
>>> >>
>>> >>       Enjoy!
>>> >>       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
>>> >>
>>> >>
>>> >> 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
>
>
> 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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Send bugs reports to
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Discussions of bugs and features can be posted here

Hi All,

Continuing on in the work to translate Will Pirkle's filter code, I
have done translations of the Korg35 low-pass and high-pass filters
(found in the MS-10 and MS-20).  They are available at:

https://github.com/kunstmusik/libsyi/blob/master/k35.udo
https://github.com/kunstmusik/libsyi/blob/master/tests/k35.csd

These are based on the filter code presented in Pirkle's app notes:

http://www.willpirkle.com/Downloads/AN-5Korg35_V3.pdf
http://www.willpirkle.com/Downloads/AN-7Korg35HPF_V2.pdf

The k35_lpf is a 12 dB/oct low pass filter and the k35_hpf is a 6
dB/oct high pass.  Both can self-oscillate.

The test CSD example starts with a demo filter sweep of both versions
of both filters with high resonance (the filters have a-rate and
k-rate versions of the cutoff). Afterwards, I did some live coding in
Vim to put together a little bit of a beat.  There are two instruments
both using the k35 filters (ms20_drum and ms20_bass).  The former uses
a bit of tanh distortion to get a grittier sound, the latter is a
little more straightforward.  (The distortion is done outside of the
filters; I haven't had a chance to explore the internal non-linear
processing tanh distortion much, but the small bits I did yielded
interesting sound using >= 2 for saturation.) There are two player
instruments using temporal recursion to play the drum beat as well as
a bass line that uses a bit of randomness.

Enjoy!
steven

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

Hi Anton,

I've been reworking a Blue instrument and getting things to sound
rather nice, but I'm also hitting up against some CPU limits.  I don't
think it's worth replacing anything with table lookups; rather, we
should probably have these in C.

That said, some of the filters are multi-mode filters.  For those,
would it be simpler to have as a k-rate flag that switches the output
signal rather than to output all modes of the filter?

steven

On Mon, Jan 9, 2017 at 1:56 PM, Anton Kholomiov
<anton.kholomiov@gmail.com> wrote:
> Quite nice timbres could be done with this and diode one but I wish they
> were less resource hungry. Just a couple of filters like this are enough to
> load my CPU up to 100-150% and I have very good pc.. Maybe it's worth to
> consider how to substitute trigonometric functions
> with table lookup..
>
> 2016-11-30 6:54 GMT+03:00 Steven Yi <stevenyi@gmail.com>:
>>
>> Thanks all!
>>
>> I have a few more filters to do within the zdf.udo file (should be
>> apparent which ones near the end aren't yet implemented).  After that,
>> probably a bit of a break to spend time exploring using all these and
>> perhaps getting back to some sample-related interests. :)
>>
>> On Tue, Nov 29, 2016 at 3:43 PM, Rory Walsh <rorywalsh@ear.ie> wrote:
>> > I just filed an issue there Steven. I agree that it's great to have
>> > these as
>> > UDOs too, and they make great teaching tools. But I think they should
>> > also
>> > be in the main body of opcodes. What's next? You're on a roll!
>> >
>> > On 29 November 2016 at 19:08, Anton Kholomiov
>> > <anton.kholomiov@gmail.com>
>> > wrote:
>> >>
>> >> Thanks Steven! A filter is a vital part of any synthesizer. So every
>> >> new
>> >> hi-quality filter
>> >> expands the power of the synth dramatically.
>> >>
>> >>
>> >> 2016-11-29 20:11 GMT+03:00 Steven Yi <stevenyi@gmail.com>:
>> >>>
>> >>> I'd be happy to see these filters done in C, though I rather like
>> >>> being able to write, study, use these as Csound ORC code as well.
>> >>>
>> >>> I think if it does get put into C, it might be good to revisit all of
>> >>> the Q/Resonance settings between the filters and choose a single way
>> >>> to go about it (I think I might have used different ones for different
>> >>> filters).  Also, the mapping of the argument might be good to revisit
>> >>> (i.e., check if a logarithmic value would be better, or just let that
>> >>> be a user thing to do).  If these do get translated to C, I'd
>> >>> recommend whomever is doing it to double-check with Pirkle's C++ code
>> >>> (I've gone and checked a few times, but you never know!).
>> >>>
>> >>> Rory: perhaps file an issue and place it in the 6.0x milestone?
>> >>>
>> >>> On Tue, Nov 29, 2016 at 11:03 AM, jpff <jpff@codemist.co.uk> wrote:
>> >>> > Make an issue saying which filters.  Not sure about the other
>> >>> > developers but
>> >>> > i need something to do over the Christmas break
>> >>> >
>> >>> >
>> >>> > On Tue, 29 Nov 2016, Rory Walsh wrote:
>> >>> >
>> >>> >> Excellent work Steven. These are great. I would like to see them as
>> >>> >> opcodes
>> >>> >> too, just so we don't have to keep importing the UDOs into our
>> >>> >> projects.
>> >>> >>
>> >>> >> On 29 November 2016 at 15:12, Steven Yi <stevenyi@gmail.com> wrote:
>> >>> >>       Hi All,
>> >>> >>
>> >>> >>       Continuing on in the work to translate Will Pirkle's filter
>> >>> >> code,
>> >>> >>       I
>> >>> >>       have done translations of the Korg35 low-pass and high-pass
>> >>> >>       filters
>> >>> >>       (found in the MS-10 and MS-20).  They are available at:
>> >>> >>
>> >>> >>       https://github.com/kunstmusik/libsyi/blob/master/k35.udo
>> >>> >>
>> >>> >> https://github.com/kunstmusik/libsyi/blob/master/tests/k35.csd
>> >>> >>
>> >>> >>       These are based on the filter code presented in Pirkle's app
>> >>> >>       notes:
>> >>> >>
>> >>> >>       http://www.willpirkle.com/Downloads/AN-5Korg35_V3.pdf
>> >>> >>       http://www.willpirkle.com/Downloads/AN-7Korg35HPF_V2.pdf
>> >>> >>
>> >>> >>       The k35_lpf is a 12 dB/oct low pass filter and the k35_hpf is
>> >>> >> a
>> >>> >> 6
>> >>> >>       dB/oct high pass.  Both can self-oscillate.
>> >>> >>
>> >>> >>       The test CSD example starts with a demo filter sweep of both
>> >>> >>       versions
>> >>> >>       of both filters with high resonance (the filters have a-rate
>> >>> >> and
>> >>> >>       k-rate versions of the cutoff). Afterwards, I did some live
>> >>> >> coding
>> >>> >>       in
>> >>> >>       Vim to put together a little bit of a beat.  There are two
>> >>> >>       instruments
>> >>> >>       both using the k35 filters (ms20_drum and ms20_bass).  The
>> >>> >> former
>> >>> >>       uses
>> >>> >>       a bit of tanh distortion to get a grittier sound, the latter
>> >>> >> is
>> >>> >> a
>> >>> >>       little more straightforward.  (The distortion is done outside
>> >>> >> of
>> >>> >>       the
>> >>> >>       filters; I haven't had a chance to explore the internal
>> >>> >> non-linear
>> >>> >>       processing tanh distortion much, but the small bits I did
>> >>> >> yielded
>> >>> >>       interesting sound using >= 2 for saturation.) There are two
>> >>> >> player
>> >>> >>       instruments using temporal recursion to play the drum beat as
>> >>> >> well
>> >>> >>       as
>> >>> >>       a bass line that uses a bit of randomness.
>> >>> >>
>> >>> >>       Enjoy!
>> >>> >>       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
>> >>> >>
>> >>> >>
>> >>> >> 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
>> >
>> >
>> > 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

Just to follow up, I'll look into translating these into C (I'll put
it in a file called wpfilters.c, named for Will Pirkle who's code this
is all based on).  Once the code is in we can work on the opcode
signatures together.

On Tue, Jan 10, 2017 at 12:33 AM, Anton Kholomiov
<anton.kholomiov@gmail.com> wrote:
> Personally I tend to use only low-pass mode
>
> 2017-01-09 23:24 GMT+03:00 Steven Yi <stevenyi@gmail.com>:
>>
>> Hi Anton,
>>
>> I've been reworking a Blue instrument and getting things to sound
>> rather nice, but I'm also hitting up against some CPU limits.  I don't
>> think it's worth replacing anything with table lookups; rather, we
>> should probably have these in C.
>>
>> That said, some of the filters are multi-mode filters.  For those,
>> would it be simpler to have as a k-rate flag that switches the output
>> signal rather than to output all modes of the filter?
>>
>> steven
>>
>> On Mon, Jan 9, 2017 at 1:56 PM, Anton Kholomiov
>> <anton.kholomiov@gmail.com> wrote:
>> > Quite nice timbres could be done with this and diode one but I wish they
>> > were less resource hungry. Just a couple of filters like this are enough
>> > to
>> > load my CPU up to 100-150% and I have very good pc.. Maybe it's worth to
>> > consider how to substitute trigonometric functions
>> > with table lookup..
>> >
>> > 2016-11-30 6:54 GMT+03:00 Steven Yi <stevenyi@gmail.com>:
>> >>
>> >> Thanks all!
>> >>
>> >> I have a few more filters to do within the zdf.udo file (should be
>> >> apparent which ones near the end aren't yet implemented).  After that,
>> >> probably a bit of a break to spend time exploring using all these and
>> >> perhaps getting back to some sample-related interests. :)
>> >>
>> >> On Tue, Nov 29, 2016 at 3:43 PM, Rory Walsh <rorywalsh@ear.ie> wrote:
>> >> > I just filed an issue there Steven. I agree that it's great to have
>> >> > these as
>> >> > UDOs too, and they make great teaching tools. But I think they should
>> >> > also
>> >> > be in the main body of opcodes. What's next? You're on a roll!
>> >> >
>> >> > On 29 November 2016 at 19:08, Anton Kholomiov
>> >> > <anton.kholomiov@gmail.com>
>> >> > wrote:
>> >> >>
>> >> >> Thanks Steven! A filter is a vital part of any synthesizer. So every
>> >> >> new
>> >> >> hi-quality filter
>> >> >> expands the power of the synth dramatically.
>> >> >>
>> >> >>
>> >> >> 2016-11-29 20:11 GMT+03:00 Steven Yi <stevenyi@gmail.com>:
>> >> >>>
>> >> >>> I'd be happy to see these filters done in C, though I rather like
>> >> >>> being able to write, study, use these as Csound ORC code as well.
>> >> >>>
>> >> >>> I think if it does get put into C, it might be good to revisit all
>> >> >>> of
>> >> >>> the Q/Resonance settings between the filters and choose a single
>> >> >>> way
>> >> >>> to go about it (I think I might have used different ones for
>> >> >>> different
>> >> >>> filters).  Also, the mapping of the argument might be good to
>> >> >>> revisit
>> >> >>> (i.e., check if a logarithmic value would be better, or just let
>> >> >>> that
>> >> >>> be a user thing to do).  If these do get translated to C, I'd
>> >> >>> recommend whomever is doing it to double-check with Pirkle's C++
>> >> >>> code
>> >> >>> (I've gone and checked a few times, but you never know!).
>> >> >>>
>> >> >>> Rory: perhaps file an issue and place it in the 6.0x milestone?
>> >> >>>
>> >> >>> On Tue, Nov 29, 2016 at 11:03 AM, jpff <jpff@codemist.co.uk> wrote:
>> >> >>> > Make an issue saying which filters.  Not sure about the other
>> >> >>> > developers but
>> >> >>> > i need something to do over the Christmas break
>> >> >>> >
>> >> >>> >
>> >> >>> > On Tue, 29 Nov 2016, Rory Walsh wrote:
>> >> >>> >
>> >> >>> >> Excellent work Steven. These are great. I would like to see them
>> >> >>> >> as
>> >> >>> >> opcodes
>> >> >>> >> too, just so we don't have to keep importing the UDOs into our
>> >> >>> >> projects.
>> >> >>> >>
>> >> >>> >> On 29 November 2016 at 15:12, Steven Yi <stevenyi@gmail.com>
>> >> >>> >> wrote:
>> >> >>> >>       Hi All,
>> >> >>> >>
>> >> >>> >>       Continuing on in the work to translate Will Pirkle's
>> >> >>> >> filter
>> >> >>> >> code,
>> >> >>> >>       I
>> >> >>> >>       have done translations of the Korg35 low-pass and
>> >> >>> >> high-pass
>> >> >>> >>       filters
>> >> >>> >>       (found in the MS-10 and MS-20).  They are available at:
>> >> >>> >>
>> >> >>> >>       https://github.com/kunstmusik/libsyi/blob/master/k35.udo
>> >> >>> >>
>> >> >>> >> https://github.com/kunstmusik/libsyi/blob/master/tests/k35.csd
>> >> >>> >>
>> >> >>> >>       These are based on the filter code presented in Pirkle's
>> >> >>> >> app
>> >> >>> >>       notes:
>> >> >>> >>
>> >> >>> >>       http://www.willpirkle.com/Downloads/AN-5Korg35_V3.pdf
>> >> >>> >>       http://www.willpirkle.com/Downloads/AN-7Korg35HPF_V2.pdf
>> >> >>> >>
>> >> >>> >>       The k35_lpf is a 12 dB/oct low pass filter and the k35_hpf
>> >> >>> >> is
>> >> >>> >> a
>> >> >>> >> 6
>> >> >>> >>       dB/oct high pass.  Both can self-oscillate.
>> >> >>> >>
>> >> >>> >>       The test CSD example starts with a demo filter sweep of
>> >> >>> >> both
>> >> >>> >>       versions
>> >> >>> >>       of both filters with high resonance (the filters have
>> >> >>> >> a-rate
>> >> >>> >> and
>> >> >>> >>       k-rate versions of the cutoff). Afterwards, I did some
>> >> >>> >> live
>> >> >>> >> coding
>> >> >>> >>       in
>> >> >>> >>       Vim to put together a little bit of a beat.  There are two
>> >> >>> >>       instruments
>> >> >>> >>       both using the k35 filters (ms20_drum and ms20_bass).  The
>> >> >>> >> former
>> >> >>> >>       uses
>> >> >>> >>       a bit of tanh distortion to get a grittier sound, the
>> >> >>> >> latter
>> >> >>> >> is
>> >> >>> >> a
>> >> >>> >>       little more straightforward.  (The distortion is done
>> >> >>> >> outside
>> >> >>> >> of
>> >> >>> >>       the
>> >> >>> >>       filters; I haven't had a chance to explore the internal
>> >> >>> >> non-linear
>> >> >>> >>       processing tanh distortion much, but the small bits I did
>> >> >>> >> yielded
>> >> >>> >>       interesting sound using >= 2 for saturation.) There are
>> >> >>> >> two
>> >> >>> >> player
>> >> >>> >>       instruments using temporal recursion to play the drum beat
>> >> >>> >> as
>> >> >>> >> well
>> >> >>> >>       as
>> >> >>> >>       a bass line that uses a bit of randomness.
>> >> >>> >>
>> >> >>> >>       Enjoy!
>> >> >>> >>       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
>> >> >>> >>
>> >> >>> >>
>> >> >>> >> 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
>> >> >
>> >> >
>> >> > 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
>
>
> 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

Just to follow up, I'll look into translating these into C (I'll put
it in a file called wpfilters.c, named for Will Pirkle who's code this
is all based on).  Once the code is in we can work on the opcode
signatures together.

On Tue, Jan 10, 2017 at 12:33 AM, Anton Kholomiov
<anton.kholomiov@gmail.com> wrote:
> Personally I tend to use only low-pass mode
>
> 2017-01-09 23:24 GMT+03:00 Steven Yi <stevenyi@gmail.com>:
>>
>> Hi Anton,
>>
>> I've been reworking a Blue instrument and getting things to sound
>> rather nice, but I'm also hitting up against some CPU limits.  I don't
>> think it's worth replacing anything with table lookups; rather, we
>> should probably have these in C.
>>
>> That said, some of the filters are multi-mode filters.  For those,
>> would it be simpler to have as a k-rate flag that switches the output
>> signal rather than to output all modes of the filter?
>>
>> steven
>>
>> On Mon, Jan 9, 2017 at 1:56 PM, Anton Kholomiov
>> <anton.kholomiov@gmail.com> wrote:
>> > Quite nice timbres could be done with this and diode one but I wish they
>> > were less resource hungry. Just a couple of filters like this are enough
>> > to
>> > load my CPU up to 100-150% and I have very good pc.. Maybe it's worth to
>> > consider how to substitute trigonometric functions
>> > with table lookup..
>> >
>> > 2016-11-30 6:54 GMT+03:00 Steven Yi <stevenyi@gmail.com>:
>> >>
>> >> Thanks all!
>> >>
>> >> I have a few more filters to do within the zdf.udo file (should be
>> >> apparent which ones near the end aren't yet implemented).  After that,
>> >> probably a bit of a break to spend time exploring using all these and
>> >> perhaps getting back to some sample-related interests. :)
>> >>
>> >> On Tue, Nov 29, 2016 at 3:43 PM, Rory Walsh <rorywalsh@ear.ie> wrote:
>> >> > I just filed an issue there Steven. I agree that it's great to have
>> >> > these as
>> >> > UDOs too, and they make great teaching tools. But I think they should
>> >> > also
>> >> > be in the main body of opcodes. What's next? You're on a roll!
>> >> >
>> >> > On 29 November 2016 at 19:08, Anton Kholomiov
>> >> > <anton.kholomiov@gmail.com>
>> >> > wrote:
>> >> >>
>> >> >> Thanks Steven! A filter is a vital part of any synthesizer. So every
>> >> >> new
>> >> >> hi-quality filter
>> >> >> expands the power of the synth dramatically.
>> >> >>
>> >> >>
>> >> >> 2016-11-29 20:11 GMT+03:00 Steven Yi <stevenyi@gmail.com>:
>> >> >>>
>> >> >>> I'd be happy to see these filters done in C, though I rather like
>> >> >>> being able to write, study, use these as Csound ORC code as well.
>> >> >>>
>> >> >>> I think if it does get put into C, it might be good to revisit all
>> >> >>> of
>> >> >>> the Q/Resonance settings between the filters and choose a single
>> >> >>> way
>> >> >>> to go about it (I think I might have used different ones for
>> >> >>> different
>> >> >>> filters).  Also, the mapping of the argument might be good to
>> >> >>> revisit
>> >> >>> (i.e., check if a logarithmic value would be better, or just let
>> >> >>> that
>> >> >>> be a user thing to do).  If these do get translated to C, I'd
>> >> >>> recommend whomever is doing it to double-check with Pirkle's C++
>> >> >>> code
>> >> >>> (I've gone and checked a few times, but you never know!).
>> >> >>>
>> >> >>> Rory: perhaps file an issue and place it in the 6.0x milestone?
>> >> >>>
>> >> >>> On Tue, Nov 29, 2016 at 11:03 AM, jpff <jpff@codemist.co.uk> wrote:
>> >> >>> > Make an issue saying which filters.  Not sure about the other
>> >> >>> > developers but
>> >> >>> > i need something to do over the Christmas break
>> >> >>> >
>> >> >>> >
>> >> >>> > On Tue, 29 Nov 2016, Rory Walsh wrote:
>> >> >>> >
>> >> >>> >> Excellent work Steven. These are great. I would like to see them
>> >> >>> >> as
>> >> >>> >> opcodes
>> >> >>> >> too, just so we don't have to keep importing the UDOs into our
>> >> >>> >> projects.
>> >> >>> >>
>> >> >>> >> On 29 November 2016 at 15:12, Steven Yi <stevenyi@gmail.com>
>> >> >>> >> wrote:
>> >> >>> >>       Hi All,
>> >> >>> >>
>> >> >>> >>       Continuing on in the work to translate Will Pirkle's
>> >> >>> >> filter
>> >> >>> >> code,
>> >> >>> >>       I
>> >> >>> >>       have done translations of the Korg35 low-pass and
>> >> >>> >> high-pass
>> >> >>> >>       filters
>> >> >>> >>       (found in the MS-10 and MS-20).  They are available at:
>> >> >>> >>
>> >> >>> >>       https://github.com/kunstmusik/libsyi/blob/master/k35.udo
>> >> >>> >>
>> >> >>> >> https://github.com/kunstmusik/libsyi/blob/master/tests/k35.csd
>> >> >>> >>
>> >> >>> >>       These are based on the filter code presented in Pirkle's
>> >> >>> >> app
>> >> >>> >>       notes:
>> >> >>> >>
>> >> >>> >>       http://www.willpirkle.com/Downloads/AN-5Korg35_V3.pdf
>> >> >>> >>       http://www.willpirkle.com/Downloads/AN-7Korg35HPF_V2.pdf
>> >> >>> >>
>> >> >>> >>       The k35_lpf is a 12 dB/oct low pass filter and the k35_hpf
>> >> >>> >> is
>> >> >>> >> a
>> >> >>> >> 6
>> >> >>> >>       dB/oct high pass.  Both can self-oscillate.
>> >> >>> >>
>> >> >>> >>       The test CSD example starts with a demo filter sweep of
>> >> >>> >> both
>> >> >>> >>       versions
>> >> >>> >>       of both filters with high resonance (the filters have
>> >> >>> >> a-rate
>> >> >>> >> and
>> >> >>> >>       k-rate versions of the cutoff). Afterwards, I did some
>> >> >>> >> live
>> >> >>> >> coding
>> >> >>> >>       in
>> >> >>> >>       Vim to put together a little bit of a beat.  There are two
>> >> >>> >>       instruments
>> >> >>> >>       both using the k35 filters (ms20_drum and ms20_bass).  The
>> >> >>> >> former
>> >> >>> >>       uses
>> >> >>> >>       a bit of tanh distortion to get a grittier sound, the
>> >> >>> >> latter
>> >> >>> >> is
>> >> >>> >> a
>> >> >>> >>       little more straightforward.  (The distortion is done
>> >> >>> >> outside
>> >> >>> >> of
>> >> >>> >>       the
>> >> >>> >>       filters; I haven't had a chance to explore the internal
>> >> >>> >> non-linear
>> >> >>> >>       processing tanh distortion much, but the small bits I did
>> >> >>> >> yielded
>> >> >>> >>       interesting sound using >= 2 for saturation.) There are
>> >> >>> >> two
>> >> >>> >> player
>> >> >>> >>       instruments using temporal recursion to play the drum beat
>> >> >>> >> as
>> >> >>> >> well
>> >> >>> >>       as
>> >> >>> >>       a bass line that uses a bit of randomness.
>> >> >>> >>
>> >> >>> >>       Enjoy!
>> >> >>> >>       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
>> >> >>> >>
>> >> >>> >>
>> >> >>> >> 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
>> >> >
>> >> >
>> >> > 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
>
>
> 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

I will love having them as opcodes and as UDOs.  So great to learn from them in both formats.

THANKS.

-dB

On Wed, Jan 11, 2017 at 10:16 AM, Steven Yi <stevenyi@gmail.com> wrote:

Just to follow up, I'll look into translating these into C (I'll put
it in a file called wpfilters.c, named for Will Pirkle who's code this
is all based on).  Once the code is in we can work on the opcode
signatures together.

On Tue, Jan 10, 2017 at 12:33 AM, Anton Kholomiov
<anton.kholomiov@gmail.com> wrote:
> Personally I tend to use only low-pass mode
>
> 2017-01-09 23:24 GMT+03:00 Steven Yi <stevenyi@gmail.com>:
>>
>> Hi Anton,
>>
>> I've been reworking a Blue instrument and getting things to sound
>> rather nice, but I'm also hitting up against some CPU limits.  I don't
>> think it's worth replacing anything with table lookups; rather, we
>> should probably have these in C.
>>
>> That said, some of the filters are multi-mode filters.  For those,
>> would it be simpler to have as a k-rate flag that switches the output
>> signal rather than to output all modes of the filter?
>>
>> steven
>>
>> On Mon, Jan 9, 2017 at 1:56 PM, Anton Kholomiov
>> <anton.kholomiov@gmail.com> wrote:
>> > Quite nice timbres could be done with this and diode one but I wish they
>> > were less resource hungry. Just a couple of filters like this are enough
>> > to
>> > load my CPU up to 100-150% and I have very good pc.. Maybe it's worth to
>> > consider how to substitute trigonometric functions
>> > with table lookup..
>> >
>> > 2016-11-30 6:54 GMT+03:00 Steven Yi <stevenyi@gmail.com>:
>> >>
>> >> Thanks all!
>> >>
>> >> I have a few more filters to do within the zdf.udo file (should be
>> >> apparent which ones near the end aren't yet implemented).  After that,
>> >> probably a bit of a break to spend time exploring using all these and
>> >> perhaps getting back to some sample-related interests. :)
>> >>
>> >> On Tue, Nov 29, 2016 at 3:43 PM, Rory Walsh <rorywalsh@ear.ie> wrote:
>> >> > I just filed an issue there Steven. I agree that it's great to have
>> >> > these as
>> >> > UDOs too, and they make great teaching tools. But I think they should
>> >> > also
>> >> > be in the main body of opcodes. What's next? You're on a roll!
>> >> >
>> >> > On 29 November 2016 at 19:08, Anton Kholomiov
>> >> > <anton.kholomiov@gmail.com>
>> >> > wrote:
>> >> >>
>> >> >> Thanks Steven! A filter is a vital part of any synthesizer. So every
>> >> >> new
>> >> >> hi-quality filter
>> >> >> expands the power of the synth dramatically.
>> >> >>
>> >> >>
>> >> >> 2016-11-29 20:11 GMT+03:00 Steven Yi <stevenyi@gmail.com>:
>> >> >>>
>> >> >>> I'd be happy to see these filters done in C, though I rather like
>> >> >>> being able to write, study, use these as Csound ORC code as well.
>> >> >>>
>> >> >>> I think if it does get put into C, it might be good to revisit all
>> >> >>> of
>> >> >>> the Q/Resonance settings between the filters and choose a single
>> >> >>> way
>> >> >>> to go about it (I think I might have used different ones for
>> >> >>> different
>> >> >>> filters).  Also, the mapping of the argument might be good to
>> >> >>> revisit
>> >> >>> (i.e., check if a logarithmic value would be better, or just let
>> >> >>> that
>> >> >>> be a user thing to do).  If these do get translated to C, I'd
>> >> >>> recommend whomever is doing it to double-check with Pirkle's C++
>> >> >>> code
>> >> >>> (I've gone and checked a few times, but you never know!).
>> >> >>>
>> >> >>> Rory: perhaps file an issue and place it in the 6.0x milestone?
>> >> >>>
>> >> >>> On Tue, Nov 29, 2016 at 11:03 AM, jpff <jpff@codemist.co.uk> wrote:
>> >> >>> > Make an issue saying which filters.  Not sure about the other
>> >> >>> > developers but
>> >> >>> > i need something to do over the Christmas break
>> >> >>> >
>> >> >>> >
>> >> >>> > On Tue, 29 Nov 2016, Rory Walsh wrote:
>> >> >>> >
>> >> >>> >> Excellent work Steven. These are great. I would like to see them
>> >> >>> >> as
>> >> >>> >> opcodes
>> >> >>> >> too, just so we don't have to keep importing the UDOs into our
>> >> >>> >> projects.
>> >> >>> >>
>> >> >>> >> On 29 November 2016 at 15:12, Steven Yi <stevenyi@gmail.com>
>> >> >>> >> wrote:
>> >> >>> >>       Hi All,
>> >> >>> >>
>> >> >>> >>       Continuing on in the work to translate Will Pirkle's
>> >> >>> >> filter
>> >> >>> >> code,
>> >> >>> >>       I
>> >> >>> >>       have done translations of the Korg35 low-pass and
>> >> >>> >> high-pass
>> >> >>> >>       filters
>> >> >>> >>       (found in the MS-10 and MS-20).  They are available at:
>> >> >>> >>
>> >> >>> >>       https://github.com/kunstmusik/libsyi/blob/master/k35.udo
>> >> >>> >>
>> >> >>> >> https://github.com/kunstmusik/libsyi/blob/master/tests/k35.csd
>> >> >>> >>
>> >> >>> >>       These are based on the filter code presented in Pirkle's
>> >> >>> >> app
>> >> >>> >>       notes:
>> >> >>> >>
>> >> >>> >>       http://www.willpirkle.com/Downloads/AN-5Korg35_V3.pdf
>> >> >>> >>       http://www.willpirkle.com/Downloads/AN-7Korg35HPF_V2.pdf
>> >> >>> >>
>> >> >>> >>       The k35_lpf is a 12 dB/oct low pass filter and the k35_hpf
>> >> >>> >> is
>> >> >>> >> a
>> >> >>> >> 6
>> >> >>> >>       dB/oct high pass.  Both can self-oscillate.
>> >> >>> >>
>> >> >>> >>       The test CSD example starts with a demo filter sweep of
>> >> >>> >> both
>> >> >>> >>       versions
>> >> >>> >>       of both filters with high resonance (the filters have
>> >> >>> >> a-rate
>> >> >>> >> and
>> >> >>> >>       k-rate versions of the cutoff). Afterwards, I did some
>> >> >>> >> live
>> >> >>> >> coding
>> >> >>> >>       in
>> >> >>> >>       Vim to put together a little bit of a beat.  There are two
>> >> >>> >>       instruments
>> >> >>> >>       both using the k35 filters (ms20_drum and ms20_bass).  The
>> >> >>> >> former
>> >> >>> >>       uses
>> >> >>> >>       a bit of tanh distortion to get a grittier sound, the
>> >> >>> >> latter
>> >> >>> >> is
>> >> >>> >> a
>> >> >>> >>       little more straightforward.  (The distortion is done
>> >> >>> >> outside
>> >> >>> >> of
>> >> >>> >>       the
>> >> >>> >>       filters; I haven't had a chance to explore the internal
>> >> >>> >> non-linear
>> >> >>> >>       processing tanh distortion much, but the small bits I did
>> >> >>> >> yielded
>> >> >>> >>       interesting sound using >= 2 for saturation.) There are
>> >> >>> >> two
>> >> >>> >> player
>> >> >>> >>       instruments using temporal recursion to play the drum beat
>> >> >>> >> as
>> >> >>> >> well
>> >> >>> >>       as
>> >> >>> >>       a bass line that uses a bit of randomness.
>> >> >>> >>
>> >> >>> >>       Enjoy!
>> >> >>> >>       steven
>> >> >>> >>
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>> >> >>> >>
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>> >> >>> >>
>> >> >>> >
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>> >> >>
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>> >> >
>> >> > Csound mailing list Csound@listserv.heanet.ie
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>> >> > be posted here
>> >>
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>> >
>> >
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>
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_____________________________________________
Dr. Richard Boulanger
Professor of Electronic Production and Design
Professional Writing and Music Technology Division
Berklee College of Music

______________________________________________
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