Fade In Audio

lastnightsparty

Hi,

I can't seem to figure out how to fade in an mp3 after reading the documentation?

This is my code:

music = loadSound('belly.mp3');

// full volume of 1 with 5 second fade in

music.setVolume(1,[5]);

music.play();

Does anyone see what I'm doing wrong??

TechWiz777

music = loadSound('belly.mp3');

// full volume of 1 with 5 second fade in

music.setVolume(1,[5]);

music.play();

It is properly formatted now.

lastnightsparty

Does anyone know how to fade in Audio correctly with p5?

Thanks for the proper format TechWiz.

lmccart

setVolume should help: http://p5js.org/reference/#/p5.SoundFile/setVolume

so something like this:

var s = loadSound("file.mp3");
s.setVolume(0); // start sound at 0
s.setVolume(1, 3.0); // fade in over 3 secs

lastnightsparty

thanks lauren, but for some reason this syntax still doesn't work. My temporary fix was to directly animate:

output.gain.value

to get a fade until it actually works in p5.

spaghetti

Make sure it's in draw() and not setup()

lmccart

@lastnightsparty. the problem may be that loadSound is an asynchronous function, so you may be trying to set the volume before s is fully created. try putting s = loadSound() into preload, or adding a callback to set the volume after it's loaded.

something like this: http://p5js.org/reference/#p5.SoundFile/loadSound

or

function setup() {
  loadSound("file.mp3", setVol);
}

function setVol(x) {
  x.setVolume(0);
  x.setVolume(1, 3.0);
}