Sony FDR-AX40 How To Use Manual page 133

Descriptions of menu items
Auto:
The audio recording level is adjusted automatically.
Manual ( ):
Adjust the audio recording level with
lower the audio recording level.
Note
The manually set value will be reset each time you switch between [Auto] and [Manual].
When [Audio Rec Level] is set to [Manual], Blt-in Zoom Mic will switch to [Off].
It is recommended that you wear headphones to operate while checking the level.
When continuously recording loud sound, lower the recording level in advance to record
dynamic sound.
The limiter is always active regardless of the setting value of the recording level.
When you are using a dedicated microphone that is connected with the Multi interface
shoe, the recording level setting will be invalid, and you will not be able to adjust the
recording level .
After setting [My Voice Canceling] to [On], you cannot change the audio recording level
anymore.
[130] How to Use
My Button
You can assign functions that you frequently use when recording to one of the My Buttons.
1. - [Camera/Mic] - [
2. Select the menu item that you want to assign to a My Button using
3. Select one of the My Buttons to which the menu item will be assigned.
Menu operations
Shooting Assist] - [My Button].
to raise the audio recording level and
Camera/Mic
to
/ .