The device has 3 inputs as you will see in the picture I attach.
Two analog inputs and 1 digital:
- Analog micro
- Analog headphones
- USB input <-- This is how the headphones are plugged to have dolby
surround enabled and some of illuminations settings (the headphones can have multiple illumination colors, I mention this as means to be able to identify possible unknown switches the device may have).
Seem two inputs of Mixer Unit are USB streaming (Terminal 1) and Microphone(Terminal 8),
output is Speaker (Terminal 3) through Feature Unit (UnitID 2) with "Speaker Playback Volume"
This look like control in MU is "Microphone Playback Switch"
bDescriptorType 36 bDescriptorSubtype 2 (INPUT_TERMINAL) bTerminalID 1 wTerminalType 0x0101 USB Streaming
bDescriptorType 36 bDescriptorSubtype 6 (FEATURE_UNIT) bUnitID 2 bSourceID 10
bDescriptorType 36 bDescriptorSubtype 3 (OUTPUT_TERMINAL) bTerminalID 3 wTerminalType 0x0301 Speaker bAssocTerminal 0 bSourceID 2
bDescriptorType 36 bDescriptorSubtype 3 (OUTPUT_TERMINAL) bTerminalID 4 wTerminalType 0x0101 USB Streaming
bDescriptorType 36 bDescriptorSubtype 5 (SELECTOR_UNIT) bUnitID 5 bNrInPins 1 baSource( 0) 6
bDescriptorType 36 bDescriptorSubtype 6 (FEATURE_UNIT) bUnitID 6 bSourceID 7
bDescriptorType 36 bDescriptorSubtype 2 (INPUT_TERMINAL) bTerminalID 7 wTerminalType 0x0201 Microphone
bDescriptorType 36 bDescriptorSubtype 2 (INPUT_TERMINAL) bTerminalID 8 wTerminalType 0x0201 Microphone
bDescriptorType 36 bDescriptorSubtype 6 (FEATURE_UNIT) bUnitID 9 bSourceID 8
bDescriptorType 36 bDescriptorSubtype 4 (MIXER_UNIT) Warning: Descriptor too short bUnitID 10 bNrInPins 2 baSourceID( 0) 9 baSourceID( 1) 1