I have the following snippet that creates an oscillator and plays it at a certain volume. I keep the oscillator
variable outside of the scope of the function so that I can stop it with other functions if I need to.
var oscillator = null;
var isPlaying = false;
function play(freq, gain) {
//stop the oscillator if it's already playing
if (isPlaying) {
o.stop();
isPlaying = false;
}
//re-initialize the oscillator
var context = new AudioContext();
//create the volume node;
var volume = context.createGain();
volume.connect(context.destination);
volume.gain.value = gain;
//connect the oscillator to the nodes
oscillator = context.createOscillator();
oscillator.type = 'sine';
oscillator.frequency.value = freq;
oscillator.connect(volume);
oscillator.connect(context.destination);
//start playing
oscillator.start();
isPlaying = true;
//log
console.log('Playing at frequency ' + freq + ' with volume ' + gain);
}
Trouble is, the gain node volume
seems to not work as you'd expect. From what I understand, a gain of 0
is muted, and a gain of 1
is 100% volume. But, in this case, passing 0
as the gain
value only plays the sound muffled, as opposed to muting it completely (I hope I'm explaining that properly).
What am I doing wrong? Can anybody help?