# Lagging audio playback in the VSE?

I'm editing some videos in the VSE with blender 2.7 and am experiencing pauses and lagging in audio, when I (AltA), which is driving me MAD!

• I've "proxy/Timecode" all video strips to 50% with build quality to 50% too (which was tedious for lots of clips) and strip, rebuilt proxy and strip timecode indices.

• I've set the Memory cash limit to 2048, in the user preferences

But still have Audio playback problems.
I have included a blender file so you can see my settings. I have 6GB of Ram and a I5 processor.

Has my computer run out of computing power?
Have I not optimized a setting correctly?
Or have I loaded too many clips into blender?

blender file

• In the timeline window, do you have the Sync option set to "AV-Sync"? – Mike Pan Jul 13 '14 at 3:49
• That helped, but it's still sluggish. – reggie Jul 16 '14 at 13:50