WasapiCaptureRT.cs

        private void InitializeCaptureDevice(IAudioClient audioClientInterface)
        {
            var audioClient = new AudioClient((IAudioClient)audioClientInterface);
            if (waveFormat == null)
            {
                var mix = audioClient.MixFormat;
                if (mix is WaveFormatExtensible)
                {
                    if (mix.BitsPerSample == 32)
                    {
                        waveFormat = WaveFormat.CreateIeeeFloatWaveFormat(mix.SampleRate, mix.Channels);
                    }
                    else
                    {
                        waveFormat = new WaveFormat(mix.SampleRate, mix.BitsPerSample, mix.Channels);
                    }
                }
            }
              :
              :
              :
        }