Therefore, if Xponent transmits MIDI CC 22 on Channel 7 with a value of 60, it means the right scratch wheel was rotated 4 ticks in the counter-clockwise direction and the Bank switch is set to 'B'. The number of ticks of rotation is 64 minus the MIDI Value. The MIDI Value will be lower than 64 when rotating in the counter-clockwise direction. The opposite is true for counter-clockwise rotation. Therefore, if the Xponent transmits MIDI CC 22 on Channel 1 with a value of 66, this means the left scratch wheel has rotated in the clockwise direction by 2 ticks and the Bank switch is set to A. The number of ticks of rotation is the transmitted value minus 64.
When Xponent transmits a MIDI CC with a value greater than 64, this indicates clockwise rotation. When rotating the wheel, the value transmitted contains the number of ticks of rotation and the direction. If the Bank switch on the front of Xponent is moved to position B, the left wheel will transmit on Channel 6 and the right wheel will transmit on Channel 7 instead. The left scratch wheel transmits MIDI CC 22 on Channel 1 and the right scratch wheel transmits MIDI CC 22 on Channel 2 when rotated. The right scratch wheel does the same thing but on Channel 2.
The left scratch wheel transmits MIDI Note On 22 (16h) on Channel 1 when touched and Note Off 22 on Channel 1 when released. Here is the info I received regarding how the Xponent transmits MIDI: