AVer HVC130 user manual - Manual (Page 46)

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To Set the MIC Gain Level and MIC Input Source
1. Select Setting > System Settings > Video/Audio and press .
2. Select Microphone and press .
3. Select Mic Gain Level and press . Select from
the mic gain level up to 9.
AVer HVC allows you to adjust mic gain level for the
proper MIC volume and this will help to get better
reception on MIC.
4. Select MIC Through and press . Select the
source of the MIC. If you connect a MIC in AUDIO
IN port, we recommend selecting Audio in to
prevent the sound from echoing.