Not much time to work on that right now yes. Stéphane
> Le 29 sept. 2025 à 18:26, Aaron Krister Johnson <[email protected]> a écrit : > > Stephane et al, > > Gentle nudge here: any more thoughts on this MIDI channel issue, or is the > best approach for now to work (or hack) around it? > > Aaron Krister Johnson > Music, etc.: > https://soundcloud.com/aaron-krister-johnson > https://soundcloud.com/filtercreed > https://www.youtube.com/channel/UC_utjGYbSizWE0dNyr0Vdmg > https://aaronkristerjohnson.bandcamp.com/ > http://www.untwelve.org > Code: > https://github.com/akjmicro > > > On Sun, Sep 21, 2025 at 9:29 AM Aaron Krister Johnson <[email protected]> > wrote: > I guess this is a hack, but for keyOn and keyOff coming from the polyphony > code (which I traced from looking for `freq` references) I'm thinking > changing these in `poly-dsp.h` to further filter by channel at compile time > would be key? > > // MIDI API > MapUI* keyOn(int channel, int pitch, int velocity) > { > if (checkPolyphony()) { > int voice = getFreeVoice(); > fVoiceTable[voice]->keyOn(pitch, velocity, > fVoiceTable[voice]->fCurNote == kLegatoVoice); > return fVoiceTable[voice]; > } else { > return 0; > } > } > > void keyOff(int channel, int pitch, int velocity = 127) > { > if (checkPolyphony()) { > int voice = getPlayingVoice(pitch); > if (voice != kNoVoice) { > fVoiceTable[voice]->keyOff(); > } else { > fprintf(stderr, "Playing pitch = %d not found\n", pitch); > } > } > } > > Change to: > > // MIDI API > MapUI* keyOn(int channel, int pitch, int velocity) > { > if (checkPolyphony() & (channel == 1)) { // to respond only to > MIDI channel 2, actual number is MIDI channel - 1 > int voice = getFreeVoice(); > fVoiceTable[voice]->keyOn(pitch, velocity, > fVoiceTable[voice]->fCurNote == kLegatoVoice); > return fVoiceTable[voice]; > } else { > return 0; > } > } > > void keyOff(int channel, int pitch, int velocity = 127) > { > if (checkPolyphony() & (channel == 1)) { // to respond only to > MIDI channel 2, actual number is MIDI channel - 1 > int voice = getPlayingVoice(pitch); > if (voice != kNoVoice) { > fVoiceTable[voice]->keyOff(); > } else { > fprintf(stderr, "Playing pitch = %d not found\n", pitch); > } > } > } > > But yes, would be better to allow the polyphony/voice-table architecture to > be more standards compliant about channels, I'm thinking. I'll test this, for > now it will do if it works. > > Aaron Krister Johnson > Music, etc.: > https://soundcloud.com/aaron-krister-johnson > https://soundcloud.com/filtercreed > https://www.youtube.com/channel/UC_utjGYbSizWE0dNyr0Vdmg > https://aaronkristerjohnson.bandcamp.com/ > http://www.untwelve.org > Code: > https://github.com/akjmicro > > > On Sun, Sep 21, 2025 at 8:26 AM Aaron Krister Johnson <[email protected]> > wrote: > Is this MIDI channel filtering option being considered? If not, would the dev > team welcome a patch if I tried my hand at it? > > ~AKJ > > Aaron Krister Johnson > Music, etc.: > https://soundcloud.com/aaron-krister-johnson > https://soundcloud.com/filtercreed > https://www.youtube.com/channel/UC_utjGYbSizWE0dNyr0Vdmg > https://aaronkristerjohnson.bandcamp.com/ > http://www.untwelve.org > Code: > https://github.com/akjmicro > > On Fri, Sep 12, 2025, 13:31 Aaron Krister Johnson <[email protected]> wrote: > Ah, so it seems others have bumped into this limitation. > > Please, Faust devs, implement this! :D > > Aaron Krister Johnson > Music, etc.: > https://soundcloud.com/aaron-krister-johnson > https://soundcloud.com/filtercreed > https://www.youtube.com/channel/UC_utjGYbSizWE0dNyr0Vdmg > https://aaronkristerjohnson.bandcamp.com/ > http://www.untwelve.org > Code: > https://github.com/akjmicro > > > On Thu, Sep 11, 2025 at 2:17 AM <[email protected]> wrote: > Additional reading here: https://github.com/grame-cncm/faust/discussions/696 > > All of this must be carefully considered... > > Stéphane > > > Le 10 sept. 2025 à 19:26, Aaron Krister Johnson <[email protected]> a > > écrit : > > > > P.S. -- and if this is implemented, covering key/vel/velocity, too :D > > > > Aaron Krister Johnson > > Music, etc.: > > https://soundcloud.com/aaron-krister-johnson > > https://soundcloud.com/filtercreed > > https://www.youtube.com/channel/UC_utjGYbSizWE0dNyr0Vdmg > > https://aaronkristerjohnson.bandcamp.com/ > > http://www.untwelve.org > > Code: > > https://github.com/akjmicro > > > > > > On Wed, Sep 10, 2025 at 10:23 AM Aaron Krister Johnson <[email protected]> > > wrote: > > Thanks, Stephane, yes, it would be most useful to have a Faust synth only > > respond on a declared channel, and `0` (or no specification) being "listen > > on all channels". > > > > Would this be in the "options" header, then? > > > > Aaron Krister Johnson > > Music, etc.: > > https://soundcloud.com/aaron-krister-johnson > > https://soundcloud.com/filtercreed > > https://www.youtube.com/channel/UC_utjGYbSizWE0dNyr0Vdmg > > https://aaronkristerjohnson.bandcamp.com/ > > http://www.untwelve.org > > Code: > > https://github.com/akjmicro > > > > > > On Wed, Sep 10, 2025 at 9:00 AM Stéphane Letz <[email protected]> wrote: > > Hi Aaron, > > > > MIDI metadata for standard MIDI control can use MIDI channel: > > https://faustdoc.grame.fr/manual/midi/#configuring-midi-in-faust > > > > But it is currently not possible to set a given channel for polyphony, you > > can see that the channel info is not used in the polyphonic code for now: > > > > https://github.com/grame-cncm/faust/blob/f5c23da4fe6e09fa55667ae588f4b6ef9c226cae/architecture/faust/dsp/poly-dsp.h#L900 > > > > Should we extend/revisit the syntax of freq/gate/gain convention for > > something like [freq: chan], [gate: chan], [gain: chan], with the > > convention chan = 0 would mean « receive on all channels», like for other > > MIDI messages ? > > > > Stéphane > > > > > Le 10 sept. 2025 à 17:35, Aaron Krister Johnson <[email protected]> a > > > écrit : > > > > > > I notice in the manual, certain MIDI slider metadata operations can be > > > filtered by a certain MIDI channel, like `keyon` uses the velocity of a > > > given key on a given channel. > > > > > > But IMO, these kinds of operations seem geared towards a non-standard way > > > of using a MIDI signal. Most useful mono- or poly- synths would want to > > > use the general > > > keywords with special meaning: `freq/key`, `gain/vel`, and `gate` to > > > drive the usually needed MIDI parameters in, for instance, a synthesizer > > > signal chain. > > > > > > The problem I am having is: I'd like to pair a custom Faust synth with an > > > outboard analog monosynth. Ideally, I could assign Faust to listen only > > > on a certain MIDI channel. > > > As it is, it seems like I have to do the opposite: Faust will respond to > > > _all_ channels (not ideal) and I make the hardware synth respond to MIDI > > > channel 2. They are isolated only > > > by the fact that they are listening on different MIDI ports (otherwise, > > > the Faust synth would be "hearing" both channels and trying to respond to > > > both). What I have works for now, > > > but let's say I want 2 Faust synths -- they'd both be responding to all > > > channels that particular virtual port is listening on. > > > > > > So, in short: is there an easy way to make a running Faust synth instance > > > listen only to a particular MIDI channel when it's designed to use the > > > keywords `freq`, `gain`, and `gate`, > > > per the docs? How easy would it be to hack Faust or add a feature for > > > users for this if not? > > > > > > Aaron Krister Johnson > > > Music, etc.: > > > https://soundcloud.com/aaron-krister-johnson > > > https://soundcloud.com/filtercreed > > > https://www.youtube.com/channel/UC_utjGYbSizWE0dNyr0Vdmg > > > https://aaronkristerjohnson.bandcamp.com/ > > > http://www.untwelve.org > > > Code: > > > https://github.com/akjmicro > > > _______________________________________________ > > > Faudiostream-users mailing list > > > [email protected] > > > https://lists.sourceforge.net/lists/listinfo/faudiostream-users > > > _______________________________________________ Faudiostream-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/faudiostream-users
