Aaeon MB-562 Manual page 39

The Microphone In phone-jack is used to attach a microphone for live
audio input for playback, mixing, or recording. A 20dB gain can be
obtained internally. The microphone input impedance will be around
1.8k ohm.
The Game/MIDI Port connector (15-pin D-sub) is used to attach a
joystick for game interface or to attach an external FM synthesizer for
playback, mixing, or recording.
The Panasonic CD audio input connector is used to connect the audio
cable from Panasonic CD-ROM drive for playback, mixing, and
recording.
The SONY CD audio input connector is used to connect the audio
cable from SONY CD-ROM drive for playback, mixing, and recording.
This pin header can be connected to an external Volume Control-Up
switch.
This pin header can be connected to an external Volume Control-Down
switch.
Chapter 2 Installation 31