Cassp, I know what you mean about the XP-50. I used to have the XP-60. That was an awsome feature assigning patterns to the keys. Plus you could use that method to record. My old Yamaha EX-7 did this too, but it was a strictly a performance feature, and could not be used for internal recording.
Squeak
_________________________
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.