Canon EOS 5Ds Instruction Manual page 301

Wind Filter/Attenuator
Wind filter : When [Enable] is set, it reduces the wind noise when
Attenuator : Automatically suppresses sound distortion caused by
Using a microphone
Normally, the built-in microphone will record monaural sound.
Stereo sound recording is also possible by connecting an external
stereo microphone (commercially available) equipped with a
miniature stereo plug (φ3.5 mm) to the camera's external
microphone IN terminal (p.27).
In the <A> mode, [Sound recording] can be set to [On] or [Off]. If [On]
is set, the sound-recording level will be adjusted automatically (same as
with [Auto]), but the wind filter function will not take effect.
The sound volume balance between L (left) and R (right) cannot be
adjusted.
Audio is recorded at a 48 kHz/16-bit sampling rate.
If [z5: Silent Control] is set to [Enable h] (p.302), you can adjust the
sound-recording level with the <h> touch pad with less operation noise
during movie shooting.
recording outdoors. This feature takes effect only with
the built-in microphone. Note that [Enable] reduces
low bass sounds, so set it to [Disable] when there is
no wind. It will record a more natural sound than with
[Enable].
loud noises. Even if [Sound rec.] is set to [Auto] or
[Manual] before shooting, sound distortion may still
result if there is a very loud sound. In such a case,
setting it to [Enable] is recommended.
3 Setting the Sound Recording
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