Simulation of Real- time Pitch Shifting Algorithm

Abstract

Pitch, known as the fundamental frequency, is one of the main characteristics of sound. The purpose of this study is to change the pitch of a signal without changing its length. The solution of this problem is PSOLA algorithm, which is the best method to shift pitch in musical industry application . pitch-shifting algorithms can be divided into two categories; firstly time-domain which algorithm divided into three sections: a pitch detector(determine a fundamental frequency),a time compressor/expander(used to change the duration of the signal) ,and a pitch shifter(achieve a high quality output), secondly frequency-domain techniques like the time-domain technique is based on shifting small overlapping window blocks of data in time and resampling. There are various methods of detecting and shifting pitch, but in the interests of simplicity, accuracy, and speed, a three step process is used