Re: [fluid-dev] FluidSynth and MIDI channels

[Marcus Weseloh]

Hello David,

to use more than the 16 MIDI channels you probably have to talk to
fluidsynth via the API rather than through MIDI messages. Maybe you
could hack something with the built-in midi router, but I'm not sure.

But might I suggest that you look into the SysEx messages from the
Midi Tuning Standard[1]? I haven't tried it myself (will do so in a
few weeks time), but from looking at the source, FluidSynth seems to
support all the MTS SysEx messages. And even if SysEx is not possible
for you... there is always the option of using the (undocumented)
tuning commands via the FluidSynth shell. Scala[2] can export tunings
both in SysEx and FluidSynth shell commands, so you might give that a
try.

[1] http://www.midi.org/techspecs/midituning.php
[2] http://www.huygens-fokker.org/scala/

Cheers,

    Marcus

2016-08-16 22:26 GMT+02:00 David Bellows <address@hidden>:
> Plus I just realized that even if the channels work like I'm hoping,
> how in the world do I actually use them? My MIDI files can only have
> information for indicating one of 16 channels so how would I tell
> FluidSynth to use channel 17?  I guess there could be a specific
> control_code or something to indicate switching to a different bank of
> 16 channels?
>
> On Tue, Aug 16, 2016 at 10:44 AM, David Bellows <address@hidden> wrote:
>> Hi everyone,
>>
>> I'm working on a project that generates music and allows the user to
>> use any tuning I can figure out how to include. I'm also rendering the
>> music in MIDI and using pitch bend for the alternate tunings. Since
>> MIDI has 16 channels and pitch bend applies to every note on a channel
>> this effectively limits one to 16-note polyphony when dealing with
>> alternate tunings.
>>
>> I then saw the -K option which allows FluidSynth to use up to 256 channels.
>>
>> My question then is this: does this mean that one can set the pitch
>> bend to different values for all 256 channels thus giving us 256-note
>> polyphony? If so that would be a terrific feature and a godsend.
>>
>> Thanks,
>> Dave
>
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