Simple test to illustrate a small audio latency in the PPAPI version of the Flash plugin in Chrome.

.gitignore

.DS_Store

sound_test.fla

sound_test.swf

SoundTestApp.as

package  {
	import flash.events.MouseEvent;
	import flash.media.Sound;
	import flash.geom.ColorTransform;
	import flash.geom.Transform;
	import flash.media.SoundTransform;
	import flash.display.MovieClip;
	import flash.events.Event;
	import flash.text.TextField;
	import flash.system.Capabilities;
	
	// Simple demonstration of sound lag in PPAPI Flash.
	public class SoundTestApp extends MovieClip {
		
		// Stage variables
		public var version:TextField;
		public var trigger:MovieClip;
		
		// Create the sound from the embedded audio.
		// It is embedded as a 44kHz stereo 16 bit sound.
		var sound:Sound = new audio_clip();

		public function SoundTestApp() {
			addEventListener(Event.ADDED_TO_STAGE, onAddedToStage);
		}
		
		private function onAddedToStage(event:Event):void {
			removeEventListener(Event.ADDED_TO_STAGE, onAddedToStage);
			
			// Display the flash version
			version.text = "Flash version: " + Capabilities.version + (Capabilities.isDebugger ? " Debug" : " Release");

			// Play the clip silently on start so there is no
			// initial delay when triggering it.
			sound.play(0, 0, new SoundTransform(0));

			// Wire up the events
			trigger.addEventListener(MouseEvent.MOUSE_OVER, onMouseOver);
			trigger.addEventListener(MouseEvent.MOUSE_OUT, onMouseOut);
		}
		
		// Play the sound and change the square to red when mouse
		// over occurs
		private function onMouseOver(event:MouseEvent):void
		{
			var t:Transform = trigger.background.transform;
			var ct:ColorTransform = trigger.background.transform.colorTransform;
			ct.color = 0xff0000;
			t.colorTransform = ct;
			
			sound.play();
		}
		
		// Change the square to blue when mouse out occurs
		private function onMouseOut(event:MouseEvent):void
		{
			var t:Transform = trigger.background.transform;
			var ct:ColorTransform = trigger.background.transform.colorTransform;
			ct.color = 0x0066cc;
			t.colorTransform = ct;
		}
	}
}