播放时HTML5声音更大

Question

I've got a code like this:

    var upsound = new Audio('sound/upsound.mp3')
    upsound.loop = true;
    upsound.play();

I would like to get the volume louder while the audio is playing.

Answer 1

Use the volume property for this, which goes from 0.0 (mute) to 1.0 (full volume):

upsound.volume = 1.0;

Edit:

If you want to set the volume up after a certain delay, you can simply use a timeout:

usound.volume = 0.0; // Start with no sound

setTimeout(function() {
   usound.volume = 1.0; // Increase the volume after 2 seconds
}, 2000);

Answer 2

Volume attribute for audio should be the solution but until now, it seems like it is not been incorporated in any browsers. Check Browser Compatibility for Audio files . You can use something like this which will give you controls to use during playing but through coding, it is not yet possible.

<audio controls="controls">
  <source src="foo.wav" type="audio/wav">
</audio>