setUpOscillator = function(that, arg){
	arg = arg || {};
	that.soundSource = context.createOscillator();
	that.soundSource.type = that.source;
	if ( arg.pitch ) {
		if ( arg.pitch in _pitches__WEBPACK_IMPORTED_MODULE_2__["pitches"] ) {
			that.soundSource.frequency.value = _pitches__WEBPACK_IMPORTED_MODULE_2__["pitches"][arg.pitch];
		}
		else {
			that.soundSource.frequency.value = arg.pitch;
		}
	}
	else {
		that.soundSource.frequency.value = that.pitch;
	}
}
Initialize and configure an oscillator node *