I am not sure which board this goes on so if this is the wring one let me know.  

The G5 is a great computer for me.  Save one issue.  I do video recording/editing and sound recording and the system simply has too much bass in the audio.  It seems to have a bass boost or something. I assume this is great for gaming, which is what it was designed for, but it is not great for sound production.  I usually can go in an reset and eq in the base system someplace on a computer.  However, I can't find a way to to this on this one.  I can find volume, various stereo field widening settings but not any type of eq.  

Is there a way to adjust the system eq in any way?  Is there a bass boost I haven't located?  

Any help would be appreciated.