Music – Instruments – Electrical musical tone generation
Patent
1990-08-02
1993-02-16
Shoop, Jr., William M.
Music
Instruments
Electrical musical tone generation
84625, 84659, 84660, 84661, 84DIG9, 84DIG26, G10H 102, G10H 106, G10H 116, G10H 500
Patent
active
051873133
ABSTRACT:
A musical tone synthesizing apparatus simulating a wind instrument includes an excitation circuit simulating a reed operation of a mouth piece portion, a resonance circuit simulating a resonance tube and a musical tone control circuit. The excitation circuit produces an excitation signal based on an input signal and a reflected wave signal transmitted from the resonance circuit. The excitation signal is input to the resonance circuit. The resonance circuit includes a bi-directional transmission circuit and a junction unit which is inserted into the bi-directional transmission circuit. The junction unit caries out a scattering operation corresponding to a scattering operation of compression wave of air which is occurred in the vicinity of the tone hole of the resonance tube. The excitation signal propagates through the bi-directional transmission circuit in a forward direction as a progressive wave signal. Then, a signal which is occurred by a scattering operation of the junction unit and the like propagates through the bi-directional transmission circuit in a backward direction as foregoing reflected wave signal. The signal operation of the resonance circuit, i.e., the delay time required for circulating the excitation signal through the closed-loop including the excitation circuit at least is controlled by the musical tone control circuit in response to an open/close operation applied to a tone hole so that musical tones which are generated by the non-electronic wind instrument having a plurality of tone holes are to be synthesized.
REFERENCES:
patent: 4463650 (1984-08-01), Rupert
patent: 4864625 (1989-09-01), Hanzawa et al.
patent: 4984276 (1991-01-01), Smith
Shoop Jr. William M.
Sircus Brian
Yamaha Corporation
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