Fire wire is going the way of the dinosaurs. So get a USB based interface.

A good interface will give you the audio and midi inputs that you will need plus the outputs you need.

Some of the newer keyboards (midi) have a USB output and if that's the kind you have, you don't need the interface to have midi inputs.

My Focusrite has 2 audio inputs both low and high impedance, a midi in/out 5 pin connector, and 8 audio outputs that are all assignable.


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The magic you are looking for is in the work you are avoiding.