I'm looking for an OSX music editor that will allow me to change the the level of various frequencies. For example, I have some songs that have very little bass and I wish to increase the base response of just that song so I don't have to continually change the base level on my car stereo. I want this, obviously, for remaking my cd's for use in my car. Is there anything that will allow me to do this?
Any help would be greatly appreciated.