Additional Pro Tools Hardware Options Pro Tools software systems also supports the following Pro Tools hardware options. PRE (Eight-channel microphone preamp) Eleven Rack (guitar processor) MIDI I/O (10 x 10 USB MIDI interface) Worksurfaces and MIDI control surfaces: Avid Artist Series controllers Avid Pro Series controllers C|24 Command|8 M-Audio Keyboards (such as Axiom Pro) Third-party MIDI controllers (such as Mackie HUI, Peavey PC-1600, or CM Labs Motor Mix)