Wwise SDK 2022.1.4

Registers a callback to allow the game to modify or override the volume to be applied at the output of an audio bus. The callback must be registered once per bus ID. Call with in_pfnCallback = NULL to unregister.

Note: The bus in_busID needs to be a mixing bus.

Note: The callback function will not be called for the Master Audio Bus, since the output of this bus is not a bus, but is instead an Audio Device.

See also

• Advanced Mix Customization Using the Speaker Matrix Callback
• Integration Details - Environments and Game-defined Auxiliary Sends
• AkSpeakerVolumeMatrixCallbackInfo
• AK::IAkMixerInputContext
• AK::IAkMixerPluginContext

Returns

• AK_Success if successful
• AK_IDNotFound if the bus is not found
• AK_NotInitialized if the sound engine is not initialized
• AK_InsufficientMemory if there is not enough memory to complete the operation

Parameters

in_busID	Bus ID, as obtained by GetIDFromString( bus_name ).
in_pfnCallback	Callback function.
in_pCookie	User cookie.