virtual bool RequestChunk ( const FSoundWaveProxyPtr & SoundWave, uint32 ChunkIndex, [TFunction](API\Runtime\Core\GenericPlatform\TFunction)< void(EAudioChunkLoadResult)> OnLoadCompleted, [ENamedThreads::Type](API\Runtime\Core\Async\ENamedThreads__Type) ThreadToCallOnLoadCompletedOn, bool bForImmediatePlayback )