Analysis-and-manipulation approach to pitch and duration of musical instrument sounds without distorting timbral characteristics

Takehiro Abe*, Katsutoshi Itoyama, Kazuyoshi Yoshii, Kazunori Komatani, Tetsuya Ogata, Hiroshi G. Okuno

*この研究の対応する著者

研究成果: Conference contribution

1 被引用数 (Scopus)

抄録

This paper presents an analysis-manipulation method that can generate musical instrument sounds with arbitrary pitches and durations from the sound of a given musical instrument (called seed) without distorting its timbrai characteristics. Based on psychoacoustical knowledge of the auditory effects of timbres, we defined timbrai features based on the spectrogram of the sound of a musical instrument as (i) the relative amplitudes of the harmonic peaks, (ii) the distribution of the inharmonic component, and (iii) temporal envelopes. First, to analyze the timbrai features of a seed, it was separated into harmonic and inharmonic components using Itoyama's integrated model. For pitch manipulation, we took into account the pitch-dependency of features (i) and (ii). We predicted the values of each feature by using a cubic polynomial that approximated the distribution of these features over pitches. To manipulate duration, we focused on preserving feature (iii) in the attack and decay duration of a seed. Therefore, only steady durations were expanded or shrunk. In addition, we propose a method for reproducing the properties of vibrato. Experimental results demonstrated the quality of the synthesized sounds produced using our method. The spectral and MFCC distances between the synthesized sounds and actual sounds of 32 instruments were reduced by 64.70% and 32.31%, respectively.

本文言語English
ホスト出版物のタイトルProceedings - 11th International Conference on Digital Audio Effects, DAFx 2008
ページ249-256
ページ数8
出版ステータスPublished - 2008 12月 1
外部発表はい
イベント11th International Conference on Digital Audio Effects, DAFx 2008 - Espoo, Finland
継続期間: 2008 9月 12008 9月 4

出版物シリーズ

名前Proceedings - 11th International Conference on Digital Audio Effects, DAFx 2008

Conference

Conference11th International Conference on Digital Audio Effects, DAFx 2008
国/地域Finland
CityEspoo
Period08/9/108/9/4

ASJC Scopus subject areas

  • 信号処理

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