Music – Instruments – Electrical musical tone generation
Patent
1994-01-21
1996-05-28
Witkowski, Stanley J.
Music
Instruments
Electrical musical tone generation
84DIG9, 84DIG10, G10H 112
Patent
active
055213294
ABSTRACT:
A musical tone synthesizing apparatus provides a closed loop containing an adder, a delay circuit, a filter and a gain control portion. The delay circuit has a delay time which is set responsive to a tone pitch of a musical tone to be produced. An excitation signal is produced in response to the musical tone to be produced and is introduced into the closed loop through the adder, so that the excitation signal circulates through the closed loop. The gain control portion is provided to control a loop gain of the closed loop on the basis of a preset parameter and another parameter which is controlled responsive to a tone color of the musical tone to be produced. The signal circulating through the closed loop is picked up as a musical tone signal representing the musical tone to be produced. By controlling the loop gain of the closed loop, an attenuation characteristic of the musical tone signal is controlled. Hence, it is possible to freely control a sounding time of a decay sound such as a guitar sound.
REFERENCES:
patent: Re31004 (1982-08-01), Niimi
patent: 4655115 (1987-04-01), Nishimoto
patent: 5252776 (1993-10-01), Mutoh
patent: 5382751 (1995-01-01), Kitayama et al.
Hirano Masashi
Yamauchi Akira
Witkowski Stanley J.
Yamaha Corporation
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