Comment 46 for bug 396268

Same problem here, CPU frequently jumps up to 200% while banshee is running. banshee itself only consumes only ~5% (still inacceptable for just decoding a mp3 file!), but it causes pulseaudio to consume 100-150% cpu sometimes, rendering the whole system (including nautilus and ALL processes which connect to pulseaudio) unresponsable.

Same problem also occures with rhythmbox, so it looks more like a bug in ubuntus pulseaudio integration.