I operate a Mac -- I capture sound with two Shure 56 or 57 microphones which plug into an M-Audio OmniStudio USB, which transmits via USB to the computer where I capture the input using SoundStudio. I can also add MIDI and other tracks using GarageBand, which I have not even begun to make full use of. I smooth out the final cuts using the filters provided in Sound Studio. Occasionally I will use a program called SoundSoap to lean up older files with hisses and clicks or line noise in them, but in the current setup this is minimal.

This is a small desktop studio setup, which works very well for my purposes with really just two inputs from the instrument and voice mics.

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