Is there a better option than spark VideoDisplay with AV syncing capabilities

We have developed an AIR application that involves syncing multiple audio tracks with a video track.  We are using the Spark VideoDisplay component for video and the Flash SoundChannel object for audio.  We are having trouble keeping the audio synced with the video.  Is there a better component to use for this?  Is there some technique to keeping audio and video synced in Flash/AIR?