Hi. The problem is that when playing an audio file, for example a mp3, the audio sounds choppy and there is a high CPU usage :-[. The solution that I found and that has worked for me is the following:
Edit the file /etc/pulse/default.pa
Find the following line:
load-module module-udev-detect
Change the line to the following:
load-module module-udev-detect tsched=0
Restart the netbook.
:)