Some of the riffs are audio loops, and some are just single notes on say a guitar or organ. It states in the manual for the software that you specifically can use any midi keyboard to input the notes, and record in realtime using the keyboard as well.. I'm totally lost on it..

Squeak
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GEAR: Yamaha MOXF-6, Casio MZX-500, Roland Juno-Di, M-Audio Venom, Roland RS-70, Yamaha PSR S700, M-Audio Axiom Pro-61 (Midi Controller). SOFTWARE: Mixcraft-7, PowerTracks Pro Audio 2013, Beat Thang Virtual, Dimension Le.