… retour

9 / Créer un analyseur d’amplitude

var son;
var analyzer;

function preload() {
 son = loadSound('sons/electro.mp3');
}

function setup() {
 createCanvas(720, 200);
 son.loop();
 analyzer = new p5.Amplitude();
 analyzer.setInput(son);
}

function draw() {
 background(255);
 var vol = analyzer.getLevel();
 fill(236,36,94);
 noStroke();
 ellipse(width/2, height/2, 100+vol*800, 100+vol*800);
}

10 / Créer un analyseur d’amplitude (suite)

var taille;
var soundFile;
var amplitude;
var description;
var p1;
var smoothing = .01;
var smoothSlider, smoothLabel;

function preload() {
 soundFile = loadSound('voix.mp3');
}

function setup() {
 createCanvas(780, 300); 
 background(236,36,94);
 noStroke();
 fill(255);
 amplitude = new p5.Amplitude(smoothing);
 textFont("Helvetica");
 description = "Touche S : pause/play<br><br>Touche N : activer Normalize";
 p1 = createP(description);
 smoothSlider = createSlider(0.0, 99.9, smoothing*100);
 smoothLabel = createP('Lissage: ' + smoothing);
}

function draw() {
 background(236,36,94);
 var volume = amplitude.getLevel();
 taille = map(volume, 0, 1.0, 25, 400);
 ellipse(width/2, height/2, taille, taille);
 smoothing = smoothSlider.value()/100;
 smoothLabel.html('Lissage: ' + smoothing);
 amplitude.smooth(smoothing);
}

function keyPressed() {
 if (key == 's' || key == 'S') {
 if (soundFile.isPlaying()) {
 soundFile.pause();
 } else {
 soundFile.loop();
 }
 }
 if (key == 'n' || key == 'N') {
 amplitude.toggleNormalize();
 }
}

11 /Tracer la courbe d’un son

function setup() {
 createCanvas(780,300);
 soundFormats('ogg', 'mp3');
 soundFile = loadSound('sons/caisse', soundReady);
 }

function soundReady(){
 text('Cliquer pour jouer le son / Cliquer pour mettre en pause', 10, 10);
 peaks = soundFile.getPeaks();
 beginShape();
 for (i = 0; i< peaks.length; i++){
 stroke(236,36,94);
 vertex(map(i, 0, peaks.length, 0, width), map(peaks[i], -.2 , .2, height/2, 200) );
 }
 endShape();
}

function mousePressed(){
 if (soundFile.isPlaying()){
 soundFile.pause();
 } else {
 soundFile.play();
 }
}