Canon EOS C100 Instruction Manual page 76

Recording Audio
Configuring the Built-in Microphone's Low-Cut Filter
1 Open the [Int. Mic Low Cut] submenu.
[¡ Audio Setup] > [Audio Input] > [Int. Mic Low Cut]
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2 Select the desired option and then press the joystick.
Options
[Off]: For recording audio under usual conditions.
[LC1]: For recording mainly people's voices.
[LC2]: For reducing the background sound of wind when recording
outdoors in windy surroundings (for example, on a beach or close to
buildings). Note that when you use this setting some low-frequency
sounds may be suppressed along with the sound of wind.
Selecting the Built-in Microphone's Sensitivity
1 Open the [Int. Mic Sensitivity] submenu.
[¡ Audio Setup] > [Audio Input] > [Int. Mic Sensitivity]
2 Select the desired option and then press the joystick.
Options
[Normal]: For recording audio under usual conditions.
[High]: For recording audio at a higher volume (+6 dB).
Activating the Microphone Attenuator
If the audio level is too high and the sound sounds distorted when
recording with the built-in microphone or an external microphone
connected to the MIC terminal, activate the microphone attenuator (built-
in microphone: 12 dB, external microphone (MIC terminal): 20 dB).
1 Open the [MIC/Int. Mic Att.] submenu.
[¡ Audio Setup] > [Audio Input] > [MIC/Int. Mic Att.]
2 Select [On] and then press the joystick.
[¡ Audio Setup]
[ Audio Input]
Int. Mic Low Cut]
[
[Off]
[¡ Audio Setup]
Audio Input]
[
Int. Mic Sensitivity]
[
[Normal]
[¡ Audio Setup]
Audio Input]
[
[ MIC/Int. Mic Att.]
[Off]