Playing a Pattern Only While Holding a MIDI Note?

Questions
1

I have some code I am working on that takes a collection of held notes and plays a randomized version. The code sends out MIDI data to my DAW to trigger some Kontakt instruments. Right now I have it working largely how I want it, but I am having trouble working out how to get things to stop when I want them to.

I have a MIDIFunc.noteOn playing a Pseq of a couple of Pbindefs (that was the only way I could get it to send a cc message to change articulations, and then send a note. For example:

Pbindef(\violinOneArticulation,

\type, \midi,

\midiout, m,

\midicmd, \control,

\chan, 0,

\control, 20,

\ctlNum, 32,

\dur, Pseq([0.1], 1),

);

Pbindef(\violinOneNote,

\type, \midi,

\midicmd, \noteOn,

\midiout, m,

\chan, 0,

\midinote, Pfuncn({ ~violinOneHeld.choose }, 1),

\dur, Pwhite(0.25, Pfunc({ ~violinOneDuration })),

);

I have these Pbindefs triggered by a couple of MIDIFuncs (as well as one to clear the array of notes)

MIDIFunc.noteOn({ |vel, num, chan, src|

Pseq([

Pbindef(\violinOneArticulation, control: Prand([20,31,43], 3)),

Pbindef(\violinOneNote)

], 4).play; }, 120, 0);

MIDIFunc.noteOn({ |vel, num, chan, src|

Pseq([

Pbindef(\violinOneArticulation, control: Prand([8,10,21,18], 3)),

Pbindef(\violinOneNote)

], 4).play; }, 119, 0);

MIDIFunc.noteOff({ |vel, num, chan, src|

~violinOneHeld.clear;

}, 118, 0);

Right now, the 4s in the noteOn repeats are just a placeholder. What I would like to do is have the randomized noted continue to playback until the trigger note, like 120 or so, is released. I am still fairly new to SuperCollider, so I cannot figure it out.

Thank you!

2

Hi, welcome!

Pdef and Pbindef include their own storage, so you can play and stop them directly. But when you play Pbind or Pseq directly, then there’s an additional object to manage: an EventStreamPlayer. This is created by .play, and to stop it, you need to first save it in a variable, then call .stop on the variable.

MIDIFunc.noteOn({ |vel, num, chan, src|
    if(~note120.isNil) {
        ~note120 = Pseq([
            ... your stuff here
        ], 4).play;
    };
}, 120, 0);

Then a MIDIFunc.noteOff would do ~note120.stop; ~note120 = nil;.

Or use Pdef to wrap the Pseq objects (where Pdef provides the same kind of built in storage as Pbindef).

hjh

3

Thank you so much! I couldn’t get the variable approach to work the way I wanted, but wrapping everything in a Pdef did! I very much appreciate it!