frequency spectrum vs time

mrzac

Dear All, I'm trying to get a 3D plot of the energy of the spectrum vs time and frequency. Is there someone that can help me?

Thanks

TfGuy44

What code have you got so far? What does your data look like?

mrzac

I have an mp3 audio file and I want to get the same picture as below. In reality I'm not interested in doing a plot but just in having this data format and do some manipulation on it. The code I have so far is this:

var fft;
var mySound;
var width;

function preload() {
    mySound = loadSound('applause.mp3');
}

function setup() {
    createCanvas(600, 350);
    mySound.play();
    fft = new p5.FFT();

}

function draw() {

    background(200);
    var spectrum = fft.analyze();

    beginShape();
    for (var i = 0; i< spectrum.length; i++) {
        ellipse(i, map(mySound.currentTime(), 0, mySound.duration(), 50, 250), spectrum[i]*0.3, spectrum[i]*0.3 );
    }
    endShape();
}