Pitch Detection in the Browser

1. What is a pitch detector?
2. How do we detect the pitch of sound?
3. What are different methods of pitch tracking?

What is a pitch detector?

A pitch detection algorithm (PDA) is an algorithm designed to estimate the pitch or fundamental frequency of a quasiperiodic or oscillating signal, usually a digital recording of speech or a musical note or tone.

How do we detect the pitch of sound?

High-pitched sounds are detected by cells with shorter hair bundles, located closest to where sound enters the ear; lower-pitched sounds are detected by cells with taller hair bundles located further in, and that pattern progresses through the several thousand hair cells that are essential for hearing.

What are different methods of pitch tracking?

Among the various pitch detection algorithms, the following methods can be selected: modified autocorrelation method (AUTOC),² cepstrum method, multiband summary correlogram (MBSC),⁶ BaNa,⁷ YIN,⁴ yet another algorithm for pitch tracking (YAAPT),⁵ average magnitude difference function (AMDF),² SWIPE,²⁹ and pitch ...