Chrome Version       : 54.0.2840.99
OS Version: 6.3
URLs (if applicable) :
Other browsers tested:
  Add OK or FAIL after other browsers where you have tested this issue:
     Safari 5: OK
  Firefox 4.x: OK
     IE 7/8/9:

What steps will reproduce the problem?
1.

var audioContext = new (window.AudioContext || window.webkitAudioContext)();
var master = audioContext.createGain();
master.connect(audioContext.destination);
master.gain.setValueAtTime(0.01, 0);

var osc = audioContext.createOscillator();
osc.type = "square";
osc.connect(master);

osc.start(audioContext.currentTime);
osc.stop(audioContext.currentTime + 0.5);

2.
3.

What is the expected result?

The tone should play at a gain of 0.01

What happens instead of that?

The tone plays at full volume.

Please provide any additional information below. Attach a screenshot if
possible.

I have written several synthesizers using the Web Audio API and this is the first time I have observed this behavior, so it must be a semi-recent issue (within the last few months).

UserAgentString: Mozilla/5.0 (Windows NT 6.3; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/54.0.2840.99 Safari/537.36