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Please use this identifier to cite or link to this item: http://hdl.handle.net/10119/11929

Title: Study on Analyzing Individuality of Instrurment Sounds Using Non-negative Matrix Factorization
Authors: Kobayashi, Keisuke
Morikawa, Daisuke
Akagi, Masato
Issue Date: 2014
Publisher: 2014 RISP International Workshop on Nonlinear Circuits, Communications and Signal Processing (NCSP'14)
Magazine name: 2014 RISP International Workshop on Nonlinear Circuits, Communications and Signal Processing (NCSP'14)
Start page: 37
End page: 40
Abstract: Nowadays, sound production softwares are popularly used in computer music. However, to express individuality of instrument sounds, especially piano sounds, is still a challenging problem. Though individuality of a piano sound exists in its harmonic structures, the temporal variation of the harmonic structures has not been taken into consideration in the previous researches. This paper aims to study the individuality of piano sounds in their harmonic structures and temporal variation. Analyses are conducted using Non-negative Matrix Factorization (NMF). The results show that the temporal variation of high frequency components above 4 kHz is important to distinguish upright pianos and grand pianos. In addition, grand piano sounds are divided into 4 types by individuality, and individuality of upright piano sounds is observed by NMF analysis with fixing parts of basis matrix.
Rights: This material is posted here with permission of the Research Institute of Signal Processing Japan. Keisuke Kobayashi, Daisuke Morikawa and Masato Akagi, 2014 RISP International Workshop on Nonlinear Circuits, Communications and Signal Processing (NCSP'14), 2014, 37-40.
URI: http://hdl.handle.net/10119/11929
Material Type: publisher
Appears in Collections:b11-1. 会議発表論文・発表資料 (Conference Papers)

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