Pitch Detection

Considerations for Computer Music applications:

1. Signals are often noisy, eg: poor soundcards, other instruments/voices,
2. How much frequency resolution is needed? Correct octave a must, but will a semitone suffice?
3. What latency can be tolerated (what framesize should be used for analysis?)
4. Does the instrument have well-defined/behaved harmonics?

In the paper by de la Cuadra et al., ``Efficient Pitch Detection Techniques for Interactive Music'', four (4) pitch detection algorithms are summarized:

1. Harmonic Product Spectrum
2. Maximum Likelihood
3. Cepstrum-Biased HPS
4. Weighted Autocorrelation Function