I have an old, analog 4-track recorder with four outputs, and I want to digitize all four tracks onto my Mac in such a way that the four tracks remain distinct, so that I can do some digital editing and cleanup of the individual tracks before I mix them on the computer.

I bought a Delta 66 soundcard, but I need some software. Could somebody recommend a good application that could do the job?

(Note: I already have old copies of Deck II and SoundEdit 16, but they don't seem up to the four-simultaneous-input task, as far as I can tell.)