Multi-track MIDI encoding algorithm based on GHA for synthesizing vocal sounds

MIDI interface is originally designed for electronic musical instrument but we consider this music-note based coding concept can be extended for general acoustic signal description. We proposed applying MIDI technology to coding of bio-medical auscultation sound signals such as heart sounds used in medical diagnosis for constructing medical audio databases. Furthermore, we have tried to extend our encoding algorithm in order to apply to natural environmental sounds such as bird sounds and even to vocal sounds. Utilizing MIDI multi-track feature we could produce high-quality vocal sounds; namely we could make an electronic musical instrument sing a song. In this report, we describe briefly our proposed multi-track MIDI encoding algorithm based on GHA, and present an example of several coded experiments for vocal sounds using this algorithm.