Fix: PositionalAudioHelper.js parameter.

src/helpers/PositionalAudioHelper.js

@@ -12,7 +12,7 @@ function PositionalAudioHelper( audio, range, divisionsInnerAngle, divisionsOute
 
 	this.audio = audio;
 	this.range = range || 1;
-	this.divisionsInnerAngle = divisionsOuterAngle || 16;
+	this.divisionsInnerAngle = divisionsInnerAngle || 16;
 	this.divisionsOuterAngle = divisionsOuterAngle || 2;
 
 	var geometry = new BufferGeometry();