Microtuning support

[suhr]

Like in One-SF2.

See AnaMark tuning file format.

[derselbst]

You have used too few words, I can only guess what you want: Fluidsynth supports the Midi Tuning Standard, see all those tuning functions in the synth API: http://www.fluidsynth.org/api/synth_8h.html#a82eea41553b546ec063c2dc840ca711d

[suhr]

So frontends use fluidsynth as a library, not as a server? I see.

Fluidsynth supports the Midi Tuning Standard

Does that mean I can send MTS messages over MIDI to tune the synth?

[derselbst]

Does that mean I can send MTS messages over MIDI to tune the synth?

Looks pretty much like you can: https://github.com/FluidSynth/fluidsynth/blob/987aa33486f654b3f36dd4c195a78f602864a3a4/src/synth/fluid_synth.c#L1292-L1300

[suhr]

Amazing. I believe this should be documented somewhere.

[derselbst]

It's on the todo list:

fluidsynth/TODO

Line 41 in 08ba487

- Write documention on tuning

The API doc would be a suitable place. However I have neither experience with MTS nor a use-case for it.

[suhr]

I definitely have a use case for MTS, but I don't have a tool to send MTS messages. I'll write one and try to tune fluidsynth into 31edo.

[derselbst]

Ok, good luck. Closing this for now.

[suhr]

It doesn't seem do to anything. Following http://www.hermode.com/downloads/Apple_Logic_Tuning_Data.pdf and http://www.microtonal-synthesis.com/MIDItuning.html, I send SINGLE NOTE TUNING CHANGE and then TUNING PROGRAM CHANGE

fn run()  {
    let midi_out = MidiOutput::new("MTS Output").unwrap();

    let mut conn_out = midi_out.connect(0, "mts-out").unwrap();

    let mut bytes = vec![0xf0, 0x7f, 0x7f, 0x08, 0x02, 0, 127];
    for (i, v) in (0..128u8).map(|i| 36.77 + (12.0 / 31.0) * i as f32).enumerate() {
        let int = v.round();
        let msb = (int * 128.0).round();
        let lsb = (msb * 128.0).round();

        bytes.push(i as u8);
        bytes.push(int as u8);
        bytes.push(msb as u8);
        bytes.push(lsb as u8);
    };

    bytes.push(0xf7);

    drop(conn_out.send(&bytes));

    drop(conn_out.send(&[0xb0, 0x64, 0, 0x65, 0x03, 0x06, 0]));

    conn_out.close();
}

QSynth (a fluidsynth frontend) receives the message, but the tuning doesn't change.

Fluidsynth version: 1.1.6
QSynth version: 0.4.3

[derselbst]

Please discuss that "HowTo" on the mailing list, I cant give useful support. An make sure you use 1.1.8, 1.1.6 is outdated and unsupported.