internal bool TTSInitialize() { if (!_ttsIsInitialized) { // NB: once there's more than one tts_engine type available we'll need to make a public TTSInitialize() method. vx_tts_status status = VivoxCoreInstance.vx_tts_initialize(vx_tts_engine_type.tts_engine_vivox_default, out _ttsManagerId); if (vx_tts_status.tts_status_success == status) { _ttsIsInitialized = true; } } return(_ttsIsInitialized); }