The Sequencer Playpen is a powerful MAX/MSP MIDI control sequencer with many features not seen before. It's available free to qualified users. My web site has detailed info with many graphics, along with 3 You Tube videos showing each feature and showing a live performance of JUBILEE using the software. What makes this outstanding is that it is a ready to go, very elegantly-crafted high level program with extensive user manual and tutorial. Basically, it uses step record process to record three 24-step tracks which are independent.