REQUIRED OVERRIDES: These overrides are required fromISoundfieldFactory: ISoundfieldFactory::CreateNewEncoderStream ISoundfieldFactory::CreateNewTranscoderStream ISoundfieldFactory::CreateNewMixerStreamISoundfieldFactory::CreateEmptyPacketISoundfieldFactory::CanTranscodeFromSoundfieldFormatISoundfieldFactory::GetCustomEncodingSettingsClassISoundfieldFactory::GetDefaultEncodingSettingsCalled for every new endpoint submix created with this factory's endpoint type.