private void TestPitchDetection(float[] buffer, IPitchDetector pitchDetector)
{
for (int midiNoteNumber = 45; midiNoteNumber < 63; midiNoteNumber++)
{
float freq = (float)(8.175 * Math.Pow(1.05946309, midiNoteNumber));
SetFrequency(buffer, freq);
float detectedPitch = pitchDetector.DetectPitch(buffer, buffer.Length);
// since the autocorrelator works with a lag, give it two shots at the same buffer
detectedPitch = pitchDetector.DetectPitch(buffer, buffer.Length);
Console.WriteLine("Testing for {0:F2}Hz, got {1:F2}Hz", freq, detectedPitch);
//Assert.AreEqual(detectedPitch, freq, 0.5);
}
}
private void TestPitchDetection(float[] buffer, IPitchDetector pitchDetector)
{
for (int midiNoteNumber = 45; midiNoteNumber < 63; midiNoteNumber++)
{
float freq = (float)(8.175 * Math.Pow(1.05946309, midiNoteNumber));
SetFrequency(buffer, freq);
float detectedPitch = pitchDetector.DetectPitch(buffer, buffer.Length);
// since the autocorrelator works with a lag, give it two shots at the same buffer
detectedPitch = pitchDetector.DetectPitch(buffer, buffer.Length);
Console.WriteLine("Testing for {0:F2}Hz, got {1:F2}Hz", freq, detectedPitch);
//Assert.AreEqual(detectedPitch, freq, 0.5);
}
}
public int Read(byte[] buffer, int offset, int count)
{
if (waveBuffer == null || waveBuffer.MaxSize < count)
{
waveBuffer = new WaveBuffer(count);
}
int bytesRead = source.Read(waveBuffer, 0, count);
//Debug.Assert(bytesRead == count);
// the last bit sometimes needs to be rounded up:
if (bytesRead > 0)
{
bytesRead = count;
}
//pitchsource->getPitches();
int frames = bytesRead / sizeof(float); // MRH: was count
float pitch = pitchDetector.DetectPitch(waveBuffer.FloatBuffer, frames);
// MRH: an attempt to make it less "warbly" by holding onto the pitch for at least one more buffer
if (pitch == 0f && release < maxHold)
{
pitch = previousPitch;
release++;
}
else
{
this.previousPitch = pitch;
release = 0;
}
int midiNoteNumber = 40;
float targetPitch = (float)(8.175 * Math.Pow(1.05946309, midiNoteNumber));
WaveBuffer outBuffer = new WaveBuffer(buffer);
pitchShifter.ShiftPitch(waveBuffer.FloatBuffer, pitch, targetPitch, outBuffer.FloatBuffer, frames);
return(frames * 4);
}
/// <summary>
/// Read the buffer and launch the Pitch Detection that will be saved in the Pitch Class.
/// </summary>
/// <param name="buffer">Byte buffer of the raw signal</param>
/// <param name="offset">Offset for the buffer</param>
/// <param name="count">Lengh of the buffer</param>
/// <returns></returns>
public int Read(byte[] buffer, int offset, int count)
{
if (waveBuffer == null || waveBuffer.MaxSize < count)
{
waveBuffer = new WaveBuffer(count);
}
int bytesRead = source.Read(waveBuffer, 0, count);
//The last bit sometimes needs to be rounded up:
if (bytesRead > 0)
{
bytesRead = count;
}
int frames = bytesRead / sizeof(float);
//Launch the pitch detection
float pitch = pitchDetector.DetectPitch(waveBuffer.FloatBuffer, frames);
if (pitch == 0f && release < maxHold)
{
pitch = previousPitch;
release++;
}
else
{
this.previousPitch = pitch;
release = 0;
}
//Save the pitch in an array in the Pitch Class
lock (AR.Lock)
{
AR.getPitch().Add(pitch);
if (AR.isRecording)
{
AR.getPitchRecorded().Add(pitch);
}
}
return(bytesRead);
}
