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概要

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A method to control the velocity of piano tones of MIDI tone synthesizers on the basis of equal loundness property is presented. The idea is a parameterization of equal loudness contour of velocity with a physical correlate to the loudness. A listening experiment was conducted to get the equal loudness contour on a particular sound synthesizer with the method of paired comparison, where the standard stimulus was note C_4 and the comparison stimuli were notes n in the chromatic scale C_2〜C_7. Regarding the physical correlate to the loudness, the A-weighted sound pressure level (L_A) was chosen to fix the method. By relating the L_A-value, l, of C_4 to the equal loudness contour, a mapping formula from (n,l) to velocity v, i.e., g : (n,l)→v=g(n,l), was established. By this mapping, note n played at velocity g(n,l) produces a tone whose loudnessis equal to the tone of C_4 sounded at ldB in the sense of L_A. The formula was implemented as part of a computer-aided piano performance system to specify dynamic expression.
一般社団法人情報処理学会の論文
2004-11-05