Alesis D4 Reference Manual page 27

Non-Registered Parameter LSB (0-127) This works similarly to controller 98
99
but the controller value selects the Least Significant Byte of the parameter to
be controlled.
121 Reset All Controllers (0) Any value sent for this controller resets volume to
maximum, pitch bend to zero, and restores all non-registered parameters to
their default values.
Pitch Bend Sending a pitch bend command prior to triggering a note or
PB
group of notes will change the pitch of the notes being triggered. Pitch bend
messages sent while a drum sound is playing have no effect on the sound.
The amount of pitch bend range depends on the sound you've called up, and
can deviate by more than the amount allowed by the tuning function.
1. The bottom line of the third page shows the Controllers status. Example:
2. Make sure the cursor is under the Controllers status.
PROG CHANGE: ON
CONTROLLERS: ON
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