Possible Duplicate:
Is there any Sound enhancers/equalizer?
Pulseaudio version 1.0 includes its own equalizer (Release Notes), but it seems that it's disabled in Ubuntu 12.04 (https://bugs.launchpad.net/ubuntu/+source/pulseaudio/+bug/932834). I know of the discontinued pulseaudio-equalizer app from webupd8.com, but it doesn't work anymore in Precise.
How can I enable pulseaudio's own system-wide equalizer?
