An NSNumber that specifies the master volume of all audio channels sent through the connection.
The values are between 0.0 and 1.0 for normal volume, or greater than 1.0 for boosting the audio gain. This attribute determines the master volumes of all audio channels sent through the connection. Applications that need to set the volumes of individual channels can set the QTCaptureConnectionAudioVolumesAttribute attribute. This string value can be used in key paths for key-value coding, key-value observing, and bindings.
Available in Mac OS X v10.5 and later.
Declaration Syntax Version Information- Available in Monobjc Bridge: 10.6 (For Mac OS X 10.6 and later), 10.5 (For Mac OS X 10.5 and later)