/**
* The main flow of the YIN algorithm. Returns a pitch value in Hz or -1 if
* no pitch is detected.
*
* @return a pitch value in Hz or -1 if no pitch is detected.
*/
public PitchDetectionResult getPitch(float[] audioBuffer)
{
int tauEstimate;
float pitchInHertz;
// step 2
difference(audioBuffer);
// step 3
cumulativeMeanNormalizedDifference();
// step 4
tauEstimate = absoluteThreshold();
// step 5
if (tauEstimate != -1)
{
float betterTau = parabolicInterpolation(tauEstimate);
// step 6
// TODO Implement optimization for the AUBIO_YIN algorithm.
// 0.77% => 0.5% error rate,
// using the data of the YIN paper
// bestLocalEstimate()
// conversion to Hz
pitchInHertz = sampleRate / betterTau;
}
else
{
// no pitch found
pitchInHertz = -1;
}
result.setPitch(pitchInHertz);
return(result);
}
