E INSTRUMENT MIX Control
A POWER Switch/VOLUME Control
M TAP Button
N PATTERN GROUP Button
O PATTERN GROUP Indicator
B MODE Selector
L Indicator
K SELECTOR Switches
J FUNCTION Button
H RUN/STOP Button
G BATTERY Check/
RUN Indicator
F CLEAR/RESET Button
I SCALE Selector
D TEMPO Control
C TRACK/INSTRUMENT Selection