Burst of noise

I was testing the 2.8.11 build on ubuntu 10.10, playing with the scrub tool (little speaker icon that you drag across a track to play it really slow, forwards or backwards) when all of a sudden the meters shot all the way up and I heard this awful white noise. It lasted for about 5 secs and then stopped.

Has this happened to anyone else and any idea why it happens or how to prevent it? My system is a 2.4 ghz macbook pro 2008. I’m running on a stock ubuntu kernel using my on board sound card. Haven’t done any of the real time tweaks yet if that matters.

i think this issue has been discussed here: