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NN:devicetopology.IPerChannelDbLevel

IPerChannelDbLevel (devicetopology.h)

The IPerChannelDbLevel interface represents a generic subunit control interface that provides per-channel control over the volume level, in decibels, of an audio stream or of a frequency band in an audio stream.

IPerChannelDbLevel

IPerChannelDbLevel interface [Core Audio]

described

coreaudio.iperchanneldblevel

devicetopology/IPerChannelDbLevel

coreaudio\iperchanneldblevel.htm

CoreAudio

e70b4518-c9de-4426-b8e5-db80656699a9

12/05/2018

IPerChannelDbLevel, IPerChannelDbLevel interface [Core Audio], IPerChannelDbLevel interface [Core Audio],described, coreaudio.iperchanneldblevel, devicetopology/IPerChannelDbLevel

devicetopology.h

Windows

Windows Vista [desktop apps only]

Windows Server 2008 [desktop apps only]

Windows

19H1

IPerChannelDbLevel

devicetopology/IPerChannelDbLevel

c++

APIRef

kbSyntax

COM

Devicetopology.h

IPerChannelDbLevel

IPerChannelDbLevel interface

-description

The IPerChannelDbLevel interface represents a generic subunit control interface that provides per-channel control over the volume level, in decibels, of an audio stream or of a frequency band in an audio stream. A positive volume level represents gain, and a negative value represents attenuation.

Clients do not call the methods in this interface directly. Instead, this interface serves as the base interface for the following interfaces, which clients do call directly: