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Impact on the sensation of consonance by controlling spectral components of simultaneous pitches consisting a chord in sound synthesis using the additive method

Pluta Marek

Vibrations in Physical Systems

2023

Vol. 34, nr 2

art. no. 2023209

In pitched sounds the ratios between frequencies of spectral components remain close to natural numbers. In acoustic instruments these ratios deviate from exact values due to damping or boundary conditions, complicating use of musical systems defining frequency ratios associated with musical intervals. If such system is imposed on the fundamental frequencies of pitches consisting a chord, higher spectral components may deviate noticeably, strengthening or weakening the effects of beating and roughness caused by their proximity, and changing chord characteristics in terms of consonance-dissonance gradation. Unlike acoustic instruments, sound synthesizers can precisely adjust components of generated signal, and use this phenomenon as a controllable timbre effect. For this purpose spectral components of a chord within the range of beating and roughness are modified to gradually strengthen or weaken both phenomena. The study presents the assumptions of the effect and its implementation in a sound synthesizer based on the additive method.

Reflections on sound timbre definitions

Sankiewicz M., Budzyński G.

Archives of Acoustics

2007

Vol. 32, No. 3

591--602

The article is concerned with systematic classification of concepts and terms in acoustics. Special attention is attached to definitions of timbre. The article presents a review of definitions of timbre published in the literature. Inadequacy of the currently used IEC definition is shown and a new definition of timbre is proposed. Discussed are advantages of the new definition and the prospects for common acceptance of this definition in acoustics.