// Test between 20Hz and 500Hz. This works very well, although it is hard to eliminate octave errors
// This test will play original, then a sine at the frequency it detected. The two should line up.
private static void pitchdetectwav(AudioPlayer pl, string strFilename, PitchDetection.PitchDetectAlgorithm algorithm)
{
string strInstdir = mediadirpitch;
WaveAudio w = new WaveAudio(strInstdir + strFilename);
if (w.getNumChannels() != 1) w.setNumChannels(1, true);
double dfreq = PitchDetection.DetectPitch(w, 50,500,algorithm);
WaveAudio testPitch = new Triangle(dfreq, 0.7).CreateWaveAudio(1.0);
pl.Play(w);
pl.Play(testPitch);
}