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

Abstract

This paper proposes a new pitch estimation method using resonator-type comb filters ) 1 /( 1 ) ( N z z H − − = for the polyphony musical sounds including a percussion sound. We can estimate one pitch of an input sound by detecting the output having maximum amplitude in twelve resonator-type comb filters connected in parallel. To detect other pitches of a polyphony, we connect one notchtype comb filter N z z H − − = 1 ) ( , that can eliminate the sound of with the pitch detected before, in series to the parallel connected resonator-type comb filters and again detect the maximum output in the parallel resonator-type comb filters. We could obtain a good performance of the pitch estimation using four musical instruments with pitch and six percussions without pitch.