Changing the sample rate of the audio device

Hello,

when I run the following code and then change the audio output device to a
device with a different sample rate the sound is distorted.

var context = new webkitAudioContext();
var gain = context.createGainNode();
gain.gain.value = 0.05;
var osc = context.createOscillator();
osc.type = 0;
osc.frequency.value = 440;
osc.connect(gain);
gain.connect(context.destination);
osc.noteOn(0);

http://jsfiddle.net/cQswX/1/

Even if I create a new context in the same tab after I changed the output
device the sound is still distorted. Only after I opened a new tab (in
Chrome) Web Audio API seems to adapt to the new settings.

I noticed this behavior when I plugged in head phones to my notebook which
is connected to a Cinema Display. The display audio device has a sample
rate of 48 kHz. The internal device has 44.1 kHz. The display was the
initial output device. When I plugged in the head phone the output switched
to the internal audio device. When I started playback the audio was
distorted.

Is there anything I can do about this in an application using Web Audio
API? Is there a way to detect the changed settings? Or is it just
a deficiency in WebKit?

Best regards

Jan