Called upon (de-)activating a bus in the host application. The Plug-in should only processed an activated bus,
the host could provide less see \ref AudioBusBuffers in the process call (see \ref IAudioProcessor::process) if last buses are not activated
Called upon (de-)activating a bus in the host application. The Plug-in should only processed an activated bus, the host could provide less see \ref AudioBusBuffers in the process call (see \ref IAudioProcessor::process) if last buses are not activated