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 8 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 got from fundamental frequency components and MIDI data was made from. We got the system that could deal with plural instruments without setting different parameters.