Machine-head interface
Panel button
20 MIC Interface
On the right side of the machine-head
Connecting the multi-function MIC to this connector.
21 headphone interface
On the left side of the machine-
head
This 3.5mm stereo jack (3-pin) for connecting headphones.
22 Self-defining(communication) interface
On
the left side of the machine-head
Firmware update for the machine-head (Controller), or
other features.
6