nicholas howe 373ad2a12c Metasound Audio Bus Writer Node ...

Adds a metasound node that sends its audio input to an audio bus.
Modifies the audio mixer interface to support the node.

FMixerSourceManager::StartAudioBus no longer sets bIsPlaying to false on sources that use an audio bus when the audio bus starts.
FMixerAudioBus::MixBuffer mixes its patch inputs into its MixedSourceData buffer, so that the patch input data is available when CopyCurrentBuffer is used to retrieve the mix.

[REVIEW] [at]aaron.mcleran [at]buzz.burrowes [at]phil.popp
#preflight 6372639c5368a3230a4ed041

[CL 23123823 by nicholas howe in ue5-main branch]

2022-11-14 14:44:30 -05:00

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