Sound production of MIDI piano tones in a dB scale on the basis of equal loudness

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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 contours on a particular sound synthesizer with the method of adjustment, where the standard stimulus was note C_4 and the comparison stimuli were notes n in the chromatic scale C_2〜C_7. A new unit velo was introduced to identify these contours so that a velo whose value is V refers to the loudness of a note that sounds equally loud as C_4 sounded at velocity V. Regarding the physical correlate to the loudness, the single event sound exposure level (L_<AE>) was chosen to fix the method. By relating the L_<AE>-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 loudness is equal to the tone of C_4 sounded at l dB in the sense of L_<AE>; a unit name dyn was given to l to refer to this loudness.

• 社団法人日本音響学会の論文

著者

• Taguti Tomoyasu

  Department Of Information Science And Systems Engineering Konan University

関連論文

• Sound production of MIDI piano tones in a dB scale on the basis of equal loudness

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