Waveshape memory type electronic musical instrument
Patent 4133242 Issued on January 9, 1979. Estimated Expiration Date: 
March 2, 1997. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
March 2, 1997. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3515792 3823390 3882751 3903775 Electronic piano circuit Frequency separator for digital musical instrument chorus effect Method of synthesizing a musical sound Touch responsive control system for a keyboard electronic musical instrument Patent #: 4033219 InventorsAssigneeApplicationNo. 05/773787 filed on 03/02/1977US Classes:84/605, Read out at different rates84/623, Time varying or dynamic Fourier components84/624ModulationExaminersPrimary: Witkowski, Stanley J.Attorney, Agent or FirmInternational ClassesG10H 7/06 (20060101)G10H 1/053 (20060101) G10H 7/02 (20060101) Foreign Application Priority Data1976-03-05 JPAbstractA waveshape memory type electronic musical instrument produces a tone signal by cyclically reading wave value samples of a tone waveshape stored in a waveshape memory. The electronic musical instrument comprises a function generator for generating a periodic function signal which includes the mathematical product of an amplitude term varying as a function of time and a cyclic term of a selected frequency, and a multiplier for modulating a part of the tone waveshape by the periodic function signal, thereby producing a musical tone signal changing in waveshape as time lapses. | |
