Paul Scott
Published © CC BY

EL Tape Music Visualiser

Visualise your favourite music mp3's with strips of glowy light awesomeness!

IntermediateFull instructions provided5,268
EL Tape Music Visualiser

Things used in this project

Hardware components

Arduino UNO & Genuino UNO
Arduino UNO & Genuino UNO
EL Shield for Arduino
EL Tape - Green 1m
EL Tape - Red 1m
EL Tape - Blue 1m


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BeatWrite sketch for Processing 2
  * This sketch demonstrates how to use the BeatDetect object in FREQ_ENERGY mode.<br />
  * You can use <code>isKick</code>, <code>isSnare</code>, </code>isHat</code>, <code>isRange</code>, 
  * and <code>isOnset(int)</code> to track whatever kind of beats you are looking to track, they will report 
  * true or false based on the state of the analysis. To "tick" the analysis you must call <code>detect</code> 
  * with successive buffers of audio. You can do this inside of <code>draw</code>, but you are likely to miss some 
  * audio buffers if you do this. The sketch implements an <code>AudioListener</code> called <code>BeatListener</code> 
  * so that it can call <code>detect</code> on every buffer of audio processed by the system without repeating a buffer 
  * or missing one.
  * <p>
  * This sketch plays an entire song so it may be a little slow to load.

import processing.serial.*;
import ddf.minim.*;
import ddf.minim.analysis.*;
import cc.arduino.*;

Minim minim;
AudioPlayer song;
BeatDetect beat;
BeatListener bl;
Arduino arduino;

int ledPin =  1;    // LED connected to EL channel 1
int ledPin2 = 2;    // LED connected to EL channel 2
int ledPin3 = 3;    // LED connected to EL channel 3

float kickSize, snareSize, hatSize;

void setup() {
  size(512, 200, P3D);
  minim = new Minim(this);
  arduino = new Arduino(this, "/dev/ttyACM1", 57600);
  song = minim.loadFile("/home/paul/Music/dope.mp3", 2048);;
  // a beat detection object that is FREQ_ENERGY mode that 
  // expects buffers the length of song's buffer size
  // and samples captured at songs's sample rate
  beat = new BeatDetect(song.bufferSize(), song.sampleRate());
  // set the sensitivity to 300 milliseconds
  // After a beat has been detected, the algorithm will wait for 300 milliseconds 
  // before allowing another beat to be reported. You can use this to dampen the 
  // algorithm if it is giving too many false-positives. The default value is 10, 
  // which is essentially no damping. If you try to set the sensitivity to a negative value, 
  // an error will be reported and it will be set to 10 instead. 
  kickSize = snareSize = hatSize = 16;
  // make a new beat listener, so that we won't miss any buffers for the analysis
  bl = new BeatListener(beat, song);  
  textFont(createFont("Helvetica", 16));
  arduino.pinMode(ledPin+3, Arduino.OUTPUT);    
  arduino.pinMode(ledPin2+3, Arduino.OUTPUT);  
  arduino.pinMode(ledPin3+3, Arduino.OUTPUT);  

void draw() {
  if(beat.isKick()) {
      arduino.digitalWrite(ledPin+3, Arduino.HIGH);   // set the LED on
      kickSize = 32;
  if(beat.isSnare()) {
      arduino.digitalWrite(ledPin2+3, Arduino.HIGH);   // set the LED on
      snareSize = 32;
  if(beat.isHat()) {
      arduino.digitalWrite(ledPin3+3, Arduino.HIGH);   // set the LED on
      hatSize = 32;
  arduino.digitalWrite(ledPin+3, Arduino.LOW);    // set the LED off
  arduino.digitalWrite(ledPin2+3, Arduino.LOW);    // set the LED off
  arduino.digitalWrite(ledPin3+3, Arduino.LOW);    // set the LED off
  text("KICK", width/4, height/2);
  text("SNARE", width/2, height/2);
  text("HAT", 3*width/4, height/2);
  kickSize = constrain(kickSize * 0.95, 16, 32);
  snareSize = constrain(snareSize * 0.95, 16, 32);
  hatSize = constrain(hatSize * 0.95, 16, 32);

void stop() {
  // always close Minim audio classes when you are finished with them
  // always stop Minim before exiting
  // this closes the sketch


class BeatListener implements AudioListener
  private BeatDetect beat;
  private AudioPlayer source;
  BeatListener(BeatDetect beat, AudioPlayer source)
    this.source = source;
    this.beat = beat;
  void samples(float[] samps)
  void samples(float[] sampsL, float[] sampsR)


Paul Scott

Paul Scott

5 projects • 25 followers
Thanks to Hyrulian.