public void StartPreview(bool windowsN)
        {
            this.windowsN = windowsN;
            try
            {
                MMDevice speakers = null;
                if (_audioOutputSingleton.SelectedAudioOutput.Value == null)
                {
                    speakers = WasapiOut.GetDefaultAudioEndpoint();
                }
                else
                {
                    speakers = (MMDevice)_audioOutputSingleton.SelectedAudioOutput.Value;
                }

                _waveOut = new WasapiOut(speakers, AudioClientShareMode.Shared, true, 80, windowsN);

                _buffBufferedWaveProvider =
                    new BufferedWaveProvider(new WaveFormat(AudioManager.INPUT_SAMPLE_RATE, 16, 1));
                _buffBufferedWaveProvider.ReadFully = true;
                _buffBufferedWaveProvider.DiscardOnBufferOverflow = true;

                RadioFilter filter = new RadioFilter(_buffBufferedWaveProvider.ToSampleProvider());

                CachedLoopingAudioProvider natoEffect =
                    new CachedLoopingAudioProvider(filter.ToWaveProvider16(), new WaveFormat(AudioManager.INPUT_SAMPLE_RATE, 16, 1), CachedAudioEffect.AudioEffectTypes.NATO_TONE);

                //add final volume boost to all mixed audio
                _volumeSampleProvider = new VolumeSampleProviderWithPeak(natoEffect.ToSampleProvider(),
                                                                         (peak => SpeakerMax = (float)VolumeConversionHelper.ConvertFloatToDB(peak)));
                _volumeSampleProvider.Volume = SpeakerBoost;


                if (speakers.AudioClient.MixFormat.Channels == 1)
                {
                    if (_volumeSampleProvider.WaveFormat.Channels == 2)
                    {
                        _waveOut.Init(_volumeSampleProvider.ToMono());
                    }
                    else
                    {
                        //already mono
                        _waveOut.Init(_volumeSampleProvider);
                    }
                }
                else
                {
                    if (_volumeSampleProvider.WaveFormat.Channels == 1)
                    {
                        _waveOut.Init(_volumeSampleProvider.ToStereo());
                    }
                    else
                    {
                        //already stereo
                        _waveOut.Init(_volumeSampleProvider);
                    }
                }

                _waveOut.Play();
            }
            catch (Exception ex)
            {
                Logger.Error(ex, "Error starting audio Output - Quitting! " + ex.Message);

                ShowOutputError("Problem Initialising Audio Output!");

                Environment.Exit(1);
            }

            try
            {
                _speex = new Preprocessor(AudioManager.SEGMENT_FRAMES, AudioManager.INPUT_SAMPLE_RATE);
                //opus
                _encoder = OpusEncoder.Create(AudioManager.INPUT_SAMPLE_RATE, 1,
                                              FragLabs.Audio.Codecs.Opus.Application.Voip);
                _encoder.ForwardErrorCorrection = false;
                _decoder = OpusDecoder.Create(AudioManager.INPUT_SAMPLE_RATE, 1);
                _decoder.ForwardErrorCorrection = false;

                var device = (MMDevice)_audioInputSingleton.SelectedAudioInput.Value;

                if (device == null)
                {
                    device = WasapiCapture.GetDefaultCaptureDevice();
                }

                device.AudioEndpointVolume.Mute = false;

                _wasapiCapture                   = new WasapiCapture(device, true);
                _wasapiCapture.ShareMode         = AudioClientShareMode.Shared;
                _wasapiCapture.DataAvailable    += WasapiCaptureOnDataAvailable;
                _wasapiCapture.RecordingStopped += WasapiCaptureOnRecordingStopped;

                //debug wave file
                //      _waveFile = new WaveFileWriter(@"C:\Temp\Test-Preview.wav", new WaveFormat(AudioManager.INPUT_SAMPLE_RATE, 16, 1));

                _wasapiCapture.StartRecording();
            }
            catch (Exception ex)
            {
                Logger.Error(ex, "Error starting audio Input - Quitting! " + ex.Message);
                ShowInputError();

                Environment.Exit(1);
            }
        }
        public void StartPreview(int mic, MMDevice speakers)
        {
            try
            {
                _settings = SettingsStore.Instance;
                _waveOut  = new WasapiOut(speakers, AudioClientShareMode.Shared, true, 40);

                _buffBufferedWaveProvider =
                    new BufferedWaveProvider(new WaveFormat(AudioManager.INPUT_SAMPLE_RATE, 16, 1));
                _buffBufferedWaveProvider.ReadFully = true;
                _buffBufferedWaveProvider.DiscardOnBufferOverflow = true;

                RadioFilter filter = new RadioFilter(_buffBufferedWaveProvider.ToSampleProvider());

                //add final volume boost to all mixed audio
                _volumeSampleProvider = new VolumeSampleProviderWithPeak(filter,
                                                                         (peak => SpeakerMax = (float)VolumeConversionHelper.ConvertFloatToDB(peak)));
                _volumeSampleProvider.Volume = SpeakerBoost;

                if (speakers.AudioClient.MixFormat.Channels == 1)
                {
                    if (_volumeSampleProvider.WaveFormat.Channels == 2)
                    {
                        _waveOut.Init(_volumeSampleProvider.ToMono());
                    }
                    else
                    {
                        //already mono
                        _waveOut.Init(_volumeSampleProvider);
                    }
                }
                else
                {
                    if (_volumeSampleProvider.WaveFormat.Channels == 1)
                    {
                        _waveOut.Init(_volumeSampleProvider.ToStereo());
                    }
                    else
                    {
                        //already stereo
                        _waveOut.Init(_volumeSampleProvider);
                    }
                }

                _waveOut.Play();
            }
            catch (Exception ex)
            {
                Logger.Error(ex, "Error starting audio Output - Quitting! " + ex.Message);

                ShowOutputError("Problem Initialising Audio Output!");

                Environment.Exit(1);
            }

            try
            {
                _speex = new Preprocessor(AudioManager.SEGMENT_FRAMES, AudioManager.INPUT_SAMPLE_RATE);
                //opus
                _encoder = OpusEncoder.Create(AudioManager.INPUT_SAMPLE_RATE, 1,
                                              FragLabs.Audio.Codecs.Opus.Application.Voip);
                _encoder.ForwardErrorCorrection = false;
                _decoder = OpusDecoder.Create(AudioManager.INPUT_SAMPLE_RATE, 1);
                _decoder.ForwardErrorCorrection = false;

                _waveIn = new WaveIn(WaveCallbackInfo.FunctionCallback())
                {
                    BufferMilliseconds = AudioManager.INPUT_AUDIO_LENGTH_MS,
                    DeviceNumber       = mic
                };

                _waveIn.NumberOfBuffers = 2;
                _waveIn.DataAvailable  += _waveIn_DataAvailable;
                _waveIn.WaveFormat      = new WaveFormat(AudioManager.INPUT_SAMPLE_RATE, 16, 1);

                //debug wave file
                //_waveFile = new WaveFileWriter(@"C:\Temp\Test-Preview.wav", _waveIn.WaveFormat);

                _waveIn.StartRecording();
            }
            catch (Exception ex)
            {
                Logger.Error(ex, "Error starting audio Input - Quitting! " + ex.Message);
                ShowInputError();

                Environment.Exit(1);
            }
        }
        public void StartPreview(int mic, MMDevice speakers)
        {
            try
            {
                _waveOut = new WasapiOut(speakers, AudioClientShareMode.Shared, true, 40);

                _buffBufferedWaveProvider           = new BufferedWaveProvider(new WaveFormat(AudioManager.INPUT_SAMPLE_RATE, 16, 1));
                _buffBufferedWaveProvider.ReadFully = true;
                _buffBufferedWaveProvider.DiscardOnBufferOverflow = true;

                RadioFilter filter = new RadioFilter(_buffBufferedWaveProvider.ToSampleProvider());

                //add final volume boost to all mixed audio
                _volumeSampleProvider        = new VolumeSampleProviderWithPeak(filter, (peak => SpeakerMax = peak));
                _volumeSampleProvider.Volume = SpeakerBoost;

                if (speakers.AudioClient.MixFormat.Channels == 1)
                {
                    if (_volumeSampleProvider.WaveFormat.Channels == 2)
                    {
                        _waveOut.Init(_volumeSampleProvider.ToMono());
                    }
                    else
                    {
                        //already mono
                        _waveOut.Init(_volumeSampleProvider);
                    }
                }
                else
                {
                    if (_volumeSampleProvider.WaveFormat.Channels == 1)
                    {
                        _waveOut.Init(_volumeSampleProvider.ToStereo());
                    }
                    else
                    {
                        //already stereo
                        _waveOut.Init(_volumeSampleProvider);
                    }
                }

                _waveOut.Play();
            }
            catch (Exception ex)
            {
                Logger.Error(ex, "Error starting audio Output - Quitting! " + ex.Message);

                MessageBox.Show($"Problem Initialising Audio Output! Try a different Output device and please post your client log on the forums", "Audio Output Error", MessageBoxButton.OK,
                                MessageBoxImage.Error);

                Environment.Exit(1);
            }

            try
            {
                //opus
                _encoder = OpusEncoder.Create(AudioManager.INPUT_SAMPLE_RATE, 1, FragLabs.Audio.Codecs.Opus.Application.Voip);
                _encoder.ForwardErrorCorrection = false;
                _decoder = OpusDecoder.Create(AudioManager.INPUT_SAMPLE_RATE, 1);
                _decoder.ForwardErrorCorrection = false;

                _waveIn = new WaveIn(WaveCallbackInfo.FunctionCallback())
                {
                    BufferMilliseconds = AudioManager.INPUT_AUDIO_LENGTH_MS,
                    DeviceNumber       = mic
                };

                _waveIn.NumberOfBuffers = 2;
                _waveIn.DataAvailable  += _waveIn_DataAvailable;
                _waveIn.WaveFormat      = new WaveFormat(AudioManager.INPUT_SAMPLE_RATE, 16, 1);

                _waveIn.StartRecording();
            }
            catch (Exception ex)
            {
                Logger.Error(ex, "Error starting audio Input - Quitting! " + ex.Message);

                MessageBox.Show($"Problem Initialising Audio Input! Try a different Input device and please post your client log on the forums", "Audio Input Error", MessageBoxButton.OK,
                                MessageBoxImage.Error);

                Environment.Exit(1);
            }
        }