SIGMA DP3 Quattro - Manual (Page 128)

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SOUND SETTINGS
This section explains settings about the Shutter Sound, Operation Sound,
Sound Volume and Playback Volume.
These sound settings can be set from [ Camera Settings] (P.27) →
[ Sound Setting].
Shutter Sound
It is possible to set the Shutter Sound by setting to [ On] or [Off].

The default setting is [ On].
Operation Sound
It is possible to set the Operation Sound when the focus is verified, alarm
when the focus is not verified and operation sound of the self-timer by
setting to [ On] or [Off].

The default setting is [ On].
Sound Volume
It is possible to set the volume of Shutter Sound and Operation Sound from
0 to 5 in six levels. It is possible to down the volume by the button and
up by the button.

Setting of 0 does not make sound.

The default setting is 3.
Playback Volume
It is possible to set the Playback Volume and Sound Memo volume from 0
to 5 in six levels. It is possible to reduce the volume by pressing the
button and increase the volume by pressing the button.

Setting of 0 does not make sound.

The default setting is 3.