Aurio

/* Read a high definition MKV video file with FFmpeg, 
 * convert it to telephone sound quality, 
 * and write it to a WAV file with NAudio. */
var sourceStream = new FFmpegSourceStream(new FileInfo("high-definition-video.mkv"));
var ieee32BitStream = new IeeeStream(sourceStream);
var monoStream = new MonoStream(ieee32BitStream);
var resamplingStream = new ResamplingStream(monoStream, ResamplingQuality.Low, 8000);
var sinkStream = new NAudioSinkStream(resamplingStream);
WaveFileWriter.CreateWaveFile("telephone-audio.wav", sinkStream);

// Setup STFT with a window size of 100ms and an overlap of 50ms
var source = AudioStreamFactory.FromFileInfoIeee32(new FileInfo("somefilecontainingaudio.ext"));
var windowSize = source.Properties.SampleRate/10;
var hopSize = windowSize/2;
var stft = new STFT(source, windowSize, hopSize, WindowType.Hann);
var spectrum = new float[windowSize/2];

// Read all frames and get their spectrum
while (stft.HasNext()) {
    stft.ReadFrame(spectrum);
    // do something with the spectrum (e.g. build spectrogram)
}

// Setup the source (AudioTrack is Aurio's internal representation of an audio file)
var audioTrack = new AudioTrack(new FileInfo("somefilecontainingaudio.ext"));

// Setup the fingerprint generator (each fingerprinting algorithms has its own namespace but works the same)
var defaultProfile = FingerprintGenerator.GetProfiles()[0]; // the first one is always the default profile
var generator = new FingerprintGenerator(defaultProfile);

// Setup the generator event listener
generator.SubFingerprintsGenerated += (sender, e) => {
    // Print the hashes
    e.SubFingerprints.ForEach(sfp => Console.WriteLine("{0,10}: {1}", sfp.Index, sfp.Hash));
};

// Generate fingerprints for the whole track
generator.Generate(audioTrack);

// Setup the sources
var audioTrack1 = new AudioTrack(new FileInfo("somefilecontainingaudio1.ext"));
var audioTrack2 = new AudioTrack(new FileInfo("somefilecontainingaudio2.ext"));

// Setup the fingerprint generator
var defaultProfile = FingerprintGenerator.GetProfiles()[0];
var generator = new FingerprintGenerator(defaultProfile);

// Create a fingerprint store
var store = new FingerprintStore(defaultProfile);

// Setup the generator event listener (a subfingerprint is a hash with its temporal index)
generator.SubFingerprintsGenerated += (sender, e) => {
    var progress = (double)e.Index / e.Indices;
    var hashes = e.SubFingerprints.Select(sfp => sfp.Hash);
    store.Add(e);
};

// Generate fingerprints for both tracks
generator.Generate(audioTrack1);
generator.Generate(audioTrack2);

// Check if tracks match
if (store.FindAllMatches().Count > 0) {
   Console.WriteLine("overlap detected!");
}

var drumTrack = new AudioTrack(new FileInfo("drums.wav"));
var guitarTrack = new AudioTrack(new FileInfo("guitar.wav"));
var vocalTrack = new AudioTrack(new FileInfo("vocals.wav"));
var band = new TrackList<AudioTrack>(new[] {drumTrack, guitarTrack, vocalTrack});

new MultitrackPlayer(band).Play();