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
