Brass instrument type tone synthesizer

Details Brass instrument type tone synthesizer Brass instrument type tone synthesizer

1992-04-07

1993-12-21

Witkowski, Stanley J.

Music

Instruments

Electrical musical tone generation

84DIG9, 84DIG10, 331 78, G10H 112

Patent

active

052722759

ABSTRACT:
A tone signal synthesizer for simulating musical tones of a brass instrument faithfully. A nonlinear portion and a pipe linear portion are combined to simulate a brass instrument. The nonlinear portion has a resonance circuit having a resonance frequency in the vicinity of the frequency of a musical tone on the basis of an upper model, and a resonance circuit having a low resonance frequency on the basis of an outer model. Not only oscillation in the frequency of the musical tone is made by the former, but the instability of a brass instrument upon starting of tone generation is simulated by the latter. Further, not only a random number generation circuit gives a random number component to a flow rate signal, but a function table and a multiplier make the level of the random number component proportional to the square root of the flow rate signal.

REFERENCES:
patent: 4736663 (1988-04-01), Wawrzynek et al.
patent: 4984276 (1991-01-01), Smith
"On The Oscillations Of Musical Instruments", McIntyre, et al, J. Acoust, Soc. Am. 74 (5), Nov. 1983, pp. 1325-1345.
"Lip Vibrations In A Cornet Mouthpiece", Daniel W. Martin, J.A.S.A., Jan., 1942, vol. 13, pp. 305-308.
"Excitation Mechanisms In Woodwind And Brass Instruments", N. H. Fletcher, Acustica, vol. 43, 1979, pp. 63-72.
"Musical Acoustics Study Meeting", Yoshikawa, Mar. 8, 1986, vol. 4, No. 7, pp. 25-34.

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