Figure out why suddenly all songs and podcasts are skipping!!! (even when they are not being streamed from the internet (and fix it)

it seems that all sound on my computer is skipping…

wah. What happened?

how to fix?

and listening to a podcast of a This Am Life show that was downloaded earlier in the week, and suddenly it started skipping! on my computer!

then i tried listening to other things… songs, etc… all were skipping.

then i shut down itunes and restarted it.

still, everything is skipping.

what to do?

if you know, please do give advice?

:(