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 <http://www.untwelve.org> 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 <http://www.untwelve.org> > > > 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 >> > >> >>
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