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?
if HAVE_DBUS if HAVE_FFTW modlibexec_LTLIBRARIES +=
module-equalizer-sink.la bin_SCRIPTS += utils/qpaeq endif endif
So for equalizer module is needed package fftw-dev. Please add needed fftw packages to pulseaudio build depends for equalizer support.
– Ringtail Mar 06 '12 at 00:25