Pitch detection of musical sounds noticing minimum output of parallel connected comb filters

Abstract

This paper proposes a simple pitch detection method using the parallel connected comb filters. We can know the pitches of a musical sound by detecting the smaller outputs in twelve comb filters connected in parallel. Each comb filter has zero points corresponding to each pitch and its harmonic frequencies, and so the outputs of the comb filters corresponding to input pitch frequencies have smaller frequency components, and show smaller outputs than other comb filters' ones. We could detect the pitches with the probability of 98.2% for double tones and 91.1% for triple tones.

Pitch estimation for musical sounds with percussion sound using resonator-type comb filters

“…We proposed a unique method of the pitch estimation that is based on the elimination of the pitch (fundamental frequency) and its harmonic components using the cascade or parallel connections of the comb filterers ) 1 ) ( ( N z z H [4] [5]. The idea using comb filters is old, but our method is new in the following points, that is, the pitch name detection using the cascade or parallel connection of comb filters by the oversampling method, and the octave detection by changing the filter order.…”