[TUniquePtr](API\Runtime\Core\Templates\TUniquePtr)< [ISoundfieldEncoderStream](API\Runtime\AudioExtensions\ISoundfieldEncoderStream) > CreateEncoderStream ( const [FAudioPluginInitializationParams](API\Runtime\AudioExtensions\FAudioPluginInitializationParams) & InitInfo, const [ISoundfieldEncodingSettingsProxy](API\Runtime\AudioExtensions\ISoundfieldEncodingSettingsProxy) & InitialSettings )