Use the jmg/supercollider branch until it's merged into main.

• git checkout jmg/supercollider

Install supercollider, the alsa utilities, and tcl-udp through apt.

• sudo apt install supercollider alsa-utils tcl-udp

Add yourself to the audio group and reboot.

• sudo usermod --group --append audio folk
• reboot

Configure jack to use your audio device in folk/virtual-programs/music.folk. Ignore the tidal error for now (TODO: handle this more gracefully).

• This is a bit more involved.
• Start by running aplay -L.
• You'll get a huge list of audio device. Try and find one that says something about HD-Audio, being generic, and being analog. You'll want the string that looks like hw:CARD=Generic_1,DEV=0 and starts with hw.
• Now, go to virtual-programs/music.folk and look for the big block of if-elseif checks, and add your own instance
  • Add a section that looks like this:

  • [... top of ifs]
    } elseif {$::thisNode eq "folk-<your node>" } {
            exec jack_control dps device hw:CARD=Generic_1,DEV=0
            exec jack_control dps period 256
    }
    [... rest of ifs]

Starting code to make audio:

Wish Supercollider plays sound foo {
    Pan2.ar(SinOsc.ar(440) * 0.5, 0.0); // This is Supercollider synth code
}

Code to play a note when it is wished for:

When /player/ wishes to play note /note/ {
    set noteAscii [scan $note %c]
    set noteIdx [expr { $noteAscii - 0x41 }]
    set noteFreq [expr { 440.0 * (2.0 ** ($noteIdx / 12.0)) }]
    Wish $player is labelled "noteFreq is $noteFreq"
    set soundName note-$player-$note
    Wish Supercollider sound $soundName attr freq is $noteFreq
    Wish Supercollider plays sound note-$player-$note {
        arg freq = 440.0;
        var envgen;
        envgen = EnvGen.kr(Env.adsr(sustainLevel: 0.2));
        Pan2.ar(SinOsc.ar(freq) * 0.5 * envgen, 0.0);
    }
}

May need to kill/restart jackdbus randomly.

For testing, try running the Supercollider interpreter separately with QT_QPA_PLATFORM=offscreen sclang.