Is it possibile to sync Processing's frameRate/draw function with and incoming MIDI signal?

fedpep · March 2018

Hi everyone, today I had this idea and tried to write some code but then got stucked.

I'm thinking about syncing Processing's frameRate/draw function with an incoming MIDI signal because I would love to create a visualization in sync with music coming from Ableton.

With the MidiBus Library and through the IAC Driver on my Mac I got the Sync/Clock MIDI Message from Ableton into Processing but then I wasn't able to link those two things together.

This is my code so far but I'm not sure it's working properly. Any help would be greatly appreciated.

import themidibus.*; //Import the library
import javax.sound.midi.MidiMessage; //Import the MidiMessage classes http://java.sun.com/j2se/1.5.0/docs/api/javax/sound/midi/MidiMessage.html
import javax.sound.midi.SysexMessage;
import javax.sound.midi.ShortMessage;

MidiBus myBus; // The MidiBus

int i = 1;

void setup() {
  size(400, 400);
  background(0);
  frameRate(60);
  MidiBus.list();
  myBus = new MidiBus(this, 0, 1);
}

void draw() {
 if(frameCount % 60 == 0) {
   println("min");
   i = 1;
 }
}

void midiMessage(MidiMessage message) {
  print(i + " ");
  i++;
}

GoToLoop · March 2018

https://Processing.org/reference/redraw_.html

fedpep · March 2018

This will be a good starting point but is it possible to sync different threads?

For example: having the draw() function doing its thing and having another function checking the sync with the MIDI input?

GoToLoop · March 2018

AFAIK, midiMessage() should be called back by MidiBus's own Thread. :-B

GoToLoop · March 2018

In order to be sure midiMessage() is indeed called back by another Thread, place this code line there: println(Thread.currentThread()); *-:)

If it isn't displayed as Thread[Animation Thread,5,main], it isn't sketch's "Animation Thread" like I guess. ;;)

fedpep · April 2018

Sorry for this late update but yesterday I found this: https://github.com/luiscript/NSYNC/blob/master/Processing/Processing_MIDI_clock/Processing_MIDI_clock.pde which is an easier approach to what I was looking for and it's working flawlessly.

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Is it possibile to sync Processing's frameRate/draw function with and incoming MIDI signal?

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