Re: [chuck-users] how to use MIDI clock in ChucK

about receiving external clock, I think the goal there is to use the clock to drive the algorithm. I wouldn't try to calculate the BPM if not for just displaying it somewhere. On Tue, 2 Jul 2019 at 22:17, Michael Heuer wrote:

All,

I'm curious how to use MIDI clock effectively in ChucK, in two main use cases:

From a sample-rate-based timer in ChucK, how should I send out MIDI clock?

while (true) { 10::ms => now; // send MIDI clock }

or

TimeSignature.common(120) @=> TimeSignature ts;

while (true) { ts.e => now; // send MIDI clock }

or (this one allows the caller to modify the tempo later)

TimeSignature.common(120) @=> TimeSignature ts; ts.eighthProvider() @=> EighthProvider e;

while (true) { e.evaluate() => now; // send MIDI clock }

From receiving MIDI clock messages from an external source, how should one adjust the BPM in ChucK?

MidiIn min; MidiMsg msg;

TimeSignature.common(120) @=> TimeSignature ts;

while (min.recv(msg)) { // if is clock … { /* new BPM */ => ts.tempo; } }

I would imagine I would want to window over the last n clock messages to average?

Thanks in advance,

michael _______________________________________________ chuck-users mailing list chuck-users@lists.cs.princeton.edu https://lists.cs.princeton.edu/mailman/listinfo/chuck-users