Check this out. Open the Songwriter template in LP X. There is a Drummer track, and EXS24 piano, and 3 audio tracks for recording live singers/players. The Drummer track displays audio regions waveforms. Drag them to another track and they change to MIDI regions. Drag them back to the original track and they remain MIDI regions. So they are essentially Green Apple Loops, I guess. This is handy for editing them but I only discovered his by accident.