Equalizer for T60 in Linux?

[Turbo Audi]

I am running Edgy Eft on my T60 with Rhythembox to play audio files. I tried to adjust sound levels with the basic volume command, however no such bass and treble etc. switches exist. On my desktop they do (audigy 2Zs). I downloaded various ALSA utils, but none have EQs. Is it our sound card? Any ideas? I need my speakers to stop sounding like it they are under a mattress!