Blackmagic Forum

I am trying to ascertain how to set (and monitor if possible) the audio gain for a capture device.

I have tried settings the scale on inputs, outputs of both digital and analog.

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deckLinkConfiguration->SetFloat(bmdDeckLinkConfigDigitalAudioInputScale, scale)

I have tried setting the value on:

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bmdDeckLinkConfigDigitalAudioOutputScale
bmdDeckLinkConfigDigitalAudioInputScale
bmdDeckLinkConfigAnalogAudioInputScaleChannel1
bmdDeckLinkConfigAnalogAudioOutputScaleChannel1

But I get an error:

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Error Domain=NSOSStatusErrorDomain Code=-2147483647 "(null)"

Any help would be much appreciated.