The number of sample modules in the electronic musical instrument using pitch shifting technique

General electronic musical instruments store some sampled modules per one octave for an instrument in the memory, and generate other sounds by the pitch shifting technique. We proposed a method to reduce the number of sampled sound modules for pitch shifting. In this method, we compared an original sound with the pitch-shifted sound at the same pitch, and calculated the average error. The error of our method was less than that of an existing method. We have tested two cases; a simple sine wave and real sound samples for a piano. As a result, we could reduce the number of sampled sound modules which should be stored and the required memory space in the electronic musical instrument