​

//SoundFile file;

var fft;

var mic;

var bands = 512; // resolution of the FFT

var spectrum;

var terrain = [];

let zoom =1;

let peak = 50;

//let notes = ["A7","F6","G6","E6","D6"," "," "," "," "," "," "];

let notes = ["A7","F6","G6","E6","D6"];

​

var lines = 60;

let duration;

let trigger;

var synth;

let px;

let notecounter =0;

​

function setup() {

  createCanvas(windowWidth, windowHeight);

  //frameRate(15);

  //file = new SoundFile(this, "03badnews.mp3");

​

  // file = new SoundFile(this, "popcorn.mp3");

  //terrain = new float [lines][bands];

  // create fft object

  fft = new p5.FFT(0.85, bands);

  // create audion in

  mic = new p5.AudioIn();

​

  //in = new AudioIn(this, 0);

​

  // start the Audio Input

  // file.play();

​

  // patch the AudioIn

  // fft.input(file);

  //// patch the AudioIn

​

​

  //// start the Audio Input

  mic.start();

synth = new p5.MonoSynth();

​

 // fft.setInput(synth);

   fft.setInput(mic);

  for (var y = 0; y < lines; y++) {

    terrain[y] = [];

    for (var x = 0; x < bands; x++) {

      terrain[y][x] = 0;

    }

  }

  //strokeWeight(2);

 // setInterval(chooseNote, 120);

}

​

function draw() {

  background(255,0, 255,127);

  fill(255,255,0);

// translate(-width/2,0,0);

  var c = color(0, 255, 255);

  stroke(c);

 // noFill();

  // translate(-width / 2, 30,0);

 //  rotateX(radians(-60));

​

  // translate(0, 0);

  //rotateZ(radians(rotZ));

  //-translate(0, -600);

  spectrum = fft.analyze();

​

  for (let y = 0; y < terrain.length; y++) {

    beginShape();

  vertex(0,((height / lines) * y +10));

     vertex(10,((height / lines) * y +10));

    for (let x = 0; x < spectrum.length; x++) {

    //  stroke(255,255,map(x,0,bands/zoom,0,255))

      vertex(map(x, 0, bands/zoom, 20, width), (map(terrain[y][x], 0, 255, 0, -peak)) + ((height / lines) * y+10));

    }

    endShape();

  }

​

 // terrain[0] = spectrum;

  // for (let j = terrain.length - 1; j > 0; j--) {

  // for (let y = 1; y < terrain.length; y++) {

  //   if (y > 0) {

  //     terrain[y] = terrain[(y - 1)];

  //   }

  // }

 // for (let y = 0; y < terrain.length; y++) {

​

  for (var y = lines - 1; y >= 0; y--) {

    //for (var i = 0; i < bands; i++) {

    terrain[0] = spectrum;

    if (y > 0) {

      if (y < lines) {

        terrain[y] = terrain[y - 1];

      }

    }

    // }

  }

 if(px !== mouseX){

   duration = map(mouseY,0,height,1.0,0);

   chooseNote();

   px=mouseX;

 }else{synth.triggerRelease();}

}

​

​

function chooseNote() {

// play(note, [velocity], [secondsFromNow], [sustainTime])

synth.play(notes[floor(random(notes.length))], 0.5, .15, 0.1);

synth.triggerAttack(notes[floor(random(notes.length))], 0.3, 0, duration);

synth.triggerAttack(notes[notecounter], 0.3, 0, duration);

notecounter++;

  notecounter%= notes.length;

}