Hi, Does my mac have an audio in port? My mac was the last 1.25 DP MDD mac. I think it does. Here's why I want to know - I want to be able to hook up my electronic drumset to the mac to use in Garageband as a "real instrument" and Apple said you can do it if you have an audio in port. There are 3 audio plugs on the back, and I'm pretty sure one's line in. I am going to buy a Midi to USB device to record the drums as a "midi" kit. I'm collaborating with a friend who's far away. The audio in would only be used so that the person who's getting the midi-file can hear the "feel" of the kit I was using. They'll assign the various kit sounds at their studio. 2nd question: If I do have a line in - can I "play back" a software instrument while recording a real instrument? I would "record the midi drums" as follows: Drums ---> Midi ---> USB ---> Garageband to record Then would produce the "audio/real instrument version by": Garage band ---> USB ---> MIDI ---> Drum kit ---> Audio out ---> line in ---> garage band as a real instrument. Does that make sense and will it work? I'm really new to this aspect of my computer.