AOC GH300 User Manual page 25

You can enable/disable the 7.1 surround sound here. After enabling the 7.1 surround
sound, you can choose between Music/Gaming mode and Movie mode (the 7.1
surround sound will be optimized according to the user scenario), or adjust the room
size (Small/Middle/Large, the 7.1 surround sound will be optimized based on the
space size).
You can also experience the 7.1 surround sound on the testing audio by clicking the
TEST button.
8.2.2 MICROPHONE
⚫ VOLUME CONTROL (Default MIC-IN= 19.53dB, LOCK=Enabled, MUTE=Disabled)
You can either adjust the overall mic volume (LOCK button=Enabled), or adjust the
Left/Right side mic volume (FRONT L/R) individually (LOCK button=Disabled). You can
mute/unmute the mic by enable/disable the MUTE button as well.
⚫ SAMPLE RATE (Default=44.1 KHz)
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