Música y dibujo.

Usando la librería sound de Processing.

import processing.sound.*;

TriOsc triOsc;

Env env;

float attackTime = 0.001;

float sustainTime = 0.004;

float sustainLevel = 0.2;

float releaseTime = 0.2;

int[] midiSequence = {61,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75};

int duration = 300;

int trigger = 0;

int note = 0;

int a;

float x,y,r,g,b;

void setup(){

  size(640,360);

  background(255);

  

  triOsc = new TriOsc(this);

  env = new Env(this);

}

void draw(){

  println(millis());

  if((millis()>trigger) && (note<midiSequence.length)){

    //triOsc.play(midiToFreq(midiSequence[note]),0.8);

    triOsc.play(midiToFreq((int)random(50,85)),0.8);

    env.play(triOsc, attackTime, sustainTime, sustainLevel, releaseTime);

    trigger = millis() + duration;

    note++;

    duration = (int)random(100,200);

    x = (float)random(0,640);

    y = (float)random(0,360);

    r = (float)random(0,255);

    g = (float)random(0,255);

    b = (float)random(0,255);

    a = (int)random(0,100);

    fill(r,g,b,a);

    noStroke();

    ellipse(x,y,(float)random(20,100),(float)random(20,100));

    //if(duration == 100){ duration = 300;}

    

    if(note == 15){

      note = 0;

    }

  }

}

float midiToFreq(int note){

  return(pow(2,((note-69)/12.0)))*440;

}