List <int> GetMidisFromClipStreaming(AudioClip clip, RAPTPitchDetector tracker)
{
float[] audioSamples = new float[clip.samples];
clip.GetData(audioSamples, 0);
int frameSize = (int)(0.1f * (float)clip.frequency);
var r = new List <float> ();
int start = 0;
int end = start + frameSize;
float db = 0f;
while (end < audioSamples.Length)
{
int prevEnd = end;
r.AddRange(tracker.getPitch(audioSamples, start, ref end, ref db, (float)clip.frequency, true, false));
if (start == end)
{
end = prevEnd + frameSize;
}
else
{
start = end;
end += frameSize;
}
}
if (audioSamples.Length - start > tracker.RequiredSampleCount((float)clip.frequency))
{
end = audioSamples.Length;
r.AddRange(tracker.getPitch(audioSamples, start, ref end, ref db, (float)clip.frequency, true, true));
}
return(RAPTPitchDetectorExtensions.HerzToMidi(r));
}
List <int> GetMidisFromClip(AudioClip clip, RAPTPitchDetector tracker)
{
float[] audioSamples = new float[clip.samples];
clip.GetData(audioSamples, 0);
float db = 0f;
var pitchContour = tracker.getPitch(audioSamples, ref db, (float)clip.frequency);
return(RAPTPitchDetectorExtensions.HerzToMidi(pitchContour));
}
public void PitchTrackerTestFrequencySweep()
{
// 0.001 and 0.01 clip lengths are too small
float[] clipLengths = new float[] { 0.001f, 0.01f, 0.1f, 1f };
float freqStep = 50f;
float freq = 50f;
float endFreq = 700f;
float sampleRate = 22050;
var pitchTracker = new RAPTPitchDetector(22050, 40f, 800f);
float min, max, mean, median;
float db = 0f;
while (freq < endFreq)
{
foreach (var clipLen in clipLengths)
{
var inputSignal = GenerateWaveform(freq, clipLen, sampleRate);
try {
var pitchContour = pitchTracker.getPitch(inputSignal, ref db, sampleRate);
if (pitchContour.Count > 0)
{
GetStats(pitchContour, out mean, out median, out min, out max);
Assert.Greater(0.05, (max - min) / max); // verify that pitch values are consistent
Debug.Log("input:" + freq + "Hz measured:" + max + "Hz delta:" + 100 * Mathf.Abs(freq - max) / freq + "%");
Assert.Greater(0.05, Mathf.Abs(freq - max) / freq); // verify measured pitch is same as input
}
else
{
Debug.Log("Could not detect pitch. Clip length:" + clipLen + "s freq:" + freq + "Hz");
Assert.Fail();
}
} catch (System.ArgumentException e) {
// do not assert here since this is expected for small clip Lengths
Debug.Log(e.Message);
}
}
freq += freqStep;
}
}