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IndexProgramming Questions & HelpPrograms › Your best metronome
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Your best metronome (Read 1311 times)
Your best metronome
Jun 7th, 2010, 12:21pm

I'd like to know how you guys do a metronome.
I had a pretty simple idea 2 or 3 months ago that was something like this :


 int counter1 = 0;
 int ellipseSize;

void setup() {

void draw() {
 counter1 = (counter1 + 1)%15;
  if (counter1 == 1) {
    ellipseSize = 40;
 } else {
   ellipseSize = 10;
 if (ellipseSize > 30) {
   println("Nb Millis : " + millis());

I'ts pretty stable, well, more than millis. If you have other ideas just sahre them here!
Re: Your best metronome
Reply #1 - Jun 7th, 2010, 2:51pm
I wouldn't count on frameRate-based stuff for timing code.  You aren't setting the absolute frame rate in setup() -- what the frameRate(n) command does is set the maximum FPS.  It can easily fluxuate if a user starts another CPU-intensive process, or stutter during garbage collection.  I usually set frameRate to 99999 to break the built-in limit of 60 FPS, and instead rely on millis():

int lastCheck; // global int
lastCheck=0; // the last line in your setup() function

void draw(){
while ((millis()-lastCheck)>=10){ // 10 here is the 'granularity'
  update(); // update counters
render(): // draw the circle at the appropriate size

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