Quick note erase from a track
This is actually from the manual, but an often overlooked method if getting rid of note data.
Erasing a Note in Real Time
It is possible to erase random note data while you are playing back a sequence in Overdub mode.
1 Select the track with the data you want to erase on the Main Screen.
2 Either press PLAY or PLAY START while holding OVER DUB or press OVERDUB during playback to switch to Overdub mode.
3 Locate the data you want to erase, and while holding ERASE, press the drum pad as-signed to the sound.
Besides erasing the drum track, you can erase notes by continuously pressing the note on the MIDI keyboard while holding ERASE.