Menu Display
When pressing the menu button, options include "VIDEO SET", "AUDIO SET", "EDID
SET", "MIC IN VOL SET", "ANAL OUT VOL SET", "IP QUERY", "UART QUERY", "REST
SET".
1) VIDEO SET: For input switch, select VIDEO SET, press enter, use the left & right
buttons to select current input signal and hit enter again to finish setting.
2) AUDIO SET: 3 audio input modes are supported, HDMI (audio input from signal),
analog (audio embedded), Mute (silent mode), select AUDIO SET press the enter
button, then use the left & right buttons to select audio input. Press enter again to finish
setting.
