static void Main(string[] args)
{
var songs = new List <Song>();
songs.AddRange(DeserializeSongs.LoadSongs(args));
songs.AddRange(DeserializeSongs.LoadSongs(DefaultSongAddress));
DetectSongs.Initialize(songs);
var sb = new StringBuilder();
songs.Select(item => sb.Append($"{item.name}, ")).ToArray();
Console.WriteLine($"{songs.Count} songs loaded: {sb.ToString()}");
var deviceCount = WaveInEvent.DeviceCount;
if (deviceCount == 0)
{
Console.WriteLine("No microphone device found.");
return;
}
for (int i = 0; i < deviceCount; i++)
{
var deviceInfo = WaveInEvent.GetCapabilities(i);
Console.WriteLine("Device {0}: {1}, {2} channels",
i, deviceInfo.ProductName, deviceInfo.Channels);
}
Console.WriteLine($"Select device from {0} to {deviceCount - 1}");
int index;
while (!int.TryParse(Console.ReadLine(), out index))
{
Console.WriteLine($"Select device from {0} to {deviceCount - 1}");
}
Console.WriteLine("Press escape to finish process.");
Freq2Note.Init();
var waveIn = new WaveInEvent()
{
DeviceNumber = index
};
waveIn.DataAvailable += AudioDataAvailable;
waveIn.WaveFormat = new WaveFormat(SamplingRate, 1);
waveIn.BufferMilliseconds = (int)((double)BufferSize / (double)SamplingRate * 1000.0);
bwp = new BufferedWaveProvider(waveIn.WaveFormat)
{
BufferLength = BufferSize * 2, DiscardOnBufferOverflow = true
};
try
{
waveIn.StartRecording();
}
catch
{
string msg = "Could not record from audio device!\n\n";
msg += "Is your microphone plugged in?\n";
msg += "Is it set as your default recording device?";
Console.WriteLine(msg, "ERROR");
}
ThreadPool.QueueUserWorkItem(EscapeLoad, null);
while (true)
{
lock (lockObj)
{
if (keyPressed)
{
break;
}
}
var note = Process();
if (note != null)
{
DetectSongs.NoteStreamLoader(note.Value);
}
var song = DetectSongs.FindSong();
if (song != null)
{
Console.WriteLine($"------------------------------------\nSong detect: {song.Value.name}\n------------------------------------");
}
}
waveIn.StopRecording();
waveIn.Dispose();
}
private static NoteOctave?Process()
{
// check the incoming microphone audio
int frameSize = BufferSize;
var audioBytes = new byte[frameSize];
bwp.Read(audioBytes, 0, frameSize);
// return if there's nothing new to plot
if (audioBytes.Length == 0)
{
return(null);
}
if (audioBytes[frameSize - 2] == 0)
{
return(null);
}
// incoming data is 16-bit (2 bytes per audio point)
int BYTES_PER_POINT = 2;
// create a (32-bit) int array ready to fill with the 16-bit data
int graphPointCount = audioBytes.Length / BYTES_PER_POINT;
// create double arrays to hold the data we will graph
double[] pcm = new double[graphPointCount];
double[] fft = new double[graphPointCount];
double[] fftReal = new double[graphPointCount / 2];
// populate Xs and Ys with double data
for (int i = 0; i < graphPointCount; i++)
{
// read the int16 from the two bytes
Int16 val = BitConverter.ToInt16(audioBytes, i * 2);
// store the value in Ys as a percent (+/- 100% = 200%)
pcm[i] = (double)(val) / Math.Pow(2, 16) * 200.0;
}
// calculate the full FFT
fft = FourierProcess.FFT(pcm);
// determine horizontal axis units for graphs
double fftMaxFreq = SamplingRate / 2;
double fftPointSpacingHz = fftMaxFreq / graphPointCount;
// just keep the real half (the other half imaginary)
Array.Copy(fft, fftReal, fftReal.Length);
/*var sb = new StringBuilder();
* fftReal.Select(item => sb.Append($"{item.ToString("F2")}, ")).ToArray();
* Console.WriteLine(sb.ToString());*/
var peekFrequency = FourierProcess.FindMaxPeekIndex(fftReal) * fftPointSpacingHz;
var noteAccuracy = Freq2Note.GetNote(peekFrequency);
if (noteAccuracy.accuracy > 0.5)
{
Console.WriteLine($"Frequency: {peekFrequency:F2}Hz, Note: {noteAccuracy.note}{noteAccuracy.octave}, Accuracy: {noteAccuracy.accuracy * 100:F0}%");
return(new NoteOctave()
{
note = noteAccuracy.note, octave = noteAccuracy.octave
});
}
return(null);
}
