Pitch Shifting Based Phase Vocoder for Synthesizing Javanese Gamelan Gong Ageng

Abstract

This paper describes the analysis and synthesis of Javanese Gamelan Gong Ageng using the pitch shifting based Phase Vocoder. Javanese Gamelan is a traditional Indonesian musical instrument played with a repetitive pattern. Gong is one of a group of instruments in the Javanese Gamelan. Gong Ageng is a large gong used in Javanese Gamelan musical to mark the end of each cycle gong. In order to synthesize the tone Gong Ageng with a fundamental frequency, it is necessary to have a tone Gong Ageng selected as a reference signal. We take voice samples for the experiments by recordings the original Gong Ageng. The synthesis stages will be held until it reaches synthetic tones which are similar to the tone of Gong Ageng. To measure their similarities to the original tone, it is necessary to test the error in order to determine the error rate. The error rate is measured by using MSE (Mean Square Error) in order to compare the original signal with the synthetic signal from the tone of Gong Ageng in the frequency domain. The results obtained is MSE = 0.0172. Thus, the accuracies reach 99.98%.