Sony DVW-707/707P Operation Manual page 22

3 MIC (microphone) AUDIO LEVEL control
If one or both of the AUDIO IN switches are set to FRONT, you can
adjust the recording level of the microphone.
2
When AUDIO is set to ON in the VF DISP 2/2 page of the setup menu,
the viewfinder DISPLAY switch is set to ON, MONITOR switch is set
to CH1, you can adjust the channel-1 audio level while watching the
indication in the viewfinder.
2-6
Chapter 2 Locations and Functions of Parts and Controls