Automatic MIDI data making from music WAVE data performed by 2 instruments using blind signal separation

Abstract

This paper deals with automatic MIDI data making system. We treat eight kinds of instruments include polyphonic ones. First we performed blind signals separation by extended H-J method, and estimated channels of each frequency components, Then harmonics structures and decay rates were automatically got from and according to these data, only fundamental frequency components were extracted. Finally pitch, volume, length, attack time, tone, and tempo were obtained from fundamental frequency components and MIDI data was made from this. We obtained a system that could deal with multiple instruments without setting different parameters.