import ddf.minim.*;

import ddf.minim.analysis.*;

 

// Declare and construct three objects

Minim minim;

AudioPlayer test;

BeatDetect beat;

 

// Declare a global variable that is the diameter of a ellipse

float eRadius;

 

void setup() {

  size(1280, 720);

  

  // Draws all geometry with smooth (anti-aliased) edges at level two

  smooth(2);

 

  // Initialize the objects

  minim = new Minim(this);

 

  // Load the song 

  test = minim.loadFile("final.mp3", 1024);

 

  // A beat detection object song SOUND_ENERGY mode with a sensitivity of 10 milliseconds

  beat = new BeatDetect();

 

  // Play the song

  test.play();

 

  // Set ellipseMode to RADIUS and initialize the variable into zero

  ellipseMode(RADIUS);

  eRadius = 0;

}

 

void draw() {

  // Clean the background in order to present new patterns

  background(0);

 

  // Analyze the samples in buffer

  beat.detect(test.mix);

 

  // Re-maps the diameter from 0 to 255

  float w = map(eRadius, 0, 80, 0, 255);

 

  noFill();

  stroke(255);

 

  // When a beat has been detected, it returns true and draw a ellipse.

  if ( beat.isOnset() ) eRadius = 80;

  ellipse(width / 2, height / 2, w, w);

 

  // A ellipse decreases its diameter each time

  eRadius *= 0.7;

}