If you are using Rhythmbox change ur gstreamer mp3 plugin to use ALSA instead of pulseaudio (via gstreamer-properties). That fixed it my music from 'lagging' while doing CPU tasks.
If you are using Rhythmbox change ur gstreamer mp3 plugin to use ALSA instead of pulseaudio (via gstreamer- properties) . That fixed it my music from 'lagging' while doing CPU tasks.