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