K5synth

One more thing: if you are controlling a synth with an arpeggiator or  
sequencer from he K5, you may have a problem as the K5 sends more  
than just a note-off when you release a note - it sends an All Notes  
Off message when you release the last note. If you have a midi data  
filter program or hardware, you might try to filter that message out.

Joel