Anyone here using your Macintosh computer for quiet practice with headphones? I am interested in doing that. My bass has active electronics, which should produce enough volume going straight into the computer via my Monster cable with quarter inch to mini-jack adapter. After that, what software will I need? I've heard of GarageBand, but I'm not interested in recording, just practice. I'd just like to be able to hear my bass, and mix it with the audio from my PowerMac's built-in CD player. Pretty simple, right? If you use your Mac for practice, please let me know your setup. Also, am I going to need expensive "studio" headphones which can handle the low-frequencies from my bass? Thanks in advance, everyone.