public async Task <string> ProcessVoiceToText(Stream stream, int bitRate)
{
var fn = $"a-{Guid.NewGuid()}-{bitRate}.wav";
stream.Seek(0, SeekOrigin.Begin);
var wavStream = new RawSourceWaveStream(stream, new WaveFormat(bitRate, 2));
// Debugging only
// WaveFileWriter.CreateWaveFile($"{fn}-source.wav", wavStream);
stream.Seek(0, SeekOrigin.Begin);
var newFormat = new WaveFormat(InputRate, 1);
WaveFormatConversionStream cs = new WaveFormatConversionStream(newFormat, wavStream);
// Debugging only
// WaveFileWriter.CreateWaveFile(fn, cs);
cs.Seek(0, SeekOrigin.Begin);
speechRecognizer.StartRecognition(cs);
var result = speechRecognizer.GetResult();
speechRecognizer.StopRecognition();
cs.Close();
return(result?.GetHypothesis());
}