Processing example synced with MIDI clock

Author: luiscript

Processing/Processing_MIDI_clock/Processing_MIDI_clock.pde

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+/*
+    
+    Basic tutorial to create animations in sync with a MIDI clock
+    by: luiscript
+    
+    
+    Important info about MIDI clock standard:
+    
+    clock     0xF8 (248)
+    start     0xFA (250)
+    continue  0xFB (251)
+    stop      0xFC (252)
+
+
+*/
+
+import themidibus.*;   // download this library or you would get an error
+
+MidiBus myBus;         // this is or MIDI bus object
+
+int timing = 0;        // counts the total of quarter notes
+float lfo = 0.0;       // this will be our LFO
+
+void setup() {
+  size(400, 400);
+  background(0);
+
+  //this prints all the available MIDI ports 
+  MidiBus.list(); 
+  
+  //select the MIDI port of your preference
+  //in my case port 0 named "Bus 1"
+  myBus = new MidiBus(this, 0, "Bus 1"); 
+}
+
+
+//this function will be called when raw MIDI data arrives
+void rawMidi(byte[] data) {  
+  
+  if(data[0] == (byte)0xFC) {         // TRUE when MIDI clock stops.
+    
+    // reset timing when clock stops to stay in sync for the next start
+    timing = 0;
+  
+  } else if(data[0] == (byte)0xF8) {  // TRUE every MIDI clock pulse
+     
+    //we need to increase timing every pulse to get the total count
+    timing++;
+    
+    // MIDI clock sends 24 ppqn (pulses per quarter note)
+    // with this formula, lfo will oscillate between 0 and 1 every quarter note
+    lfo = ( timing % 24 ) / 24.0;
+    
+    // now you can use lfo to easily animate whatever you want in sync with BPM
+  }
+}
+
+void draw() {
+  background(0);
+  
+  //since we have lfo oscillating between 0 and 1, we can use it to animate the size of this ellipse in sync
+  ellipse(width/2, height/2, 100 * lfo, 100 * lfo);
+}
+
+
+// Enjoy
+// @luiscript

README.md

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+### NSYNC
+
+If you think this is related with a Boy Band, ~~fuck off~~ ¡Bye! ¡Bye! ¡Bye!
+
+This is a repository containing basic examples that will teach you how to sync animations created with tools like processing.
+
+Processing example is synced with MIDI clock.
+
+### Autor  
+Luis Fernando García
+[@luiscript](https://twitter.com/luiscript)