Musical tone synthesizing apparatus capable of changing musical

Details Musical tone synthesizing apparatus capable of changing musical Musical tone synthesizing apparatus capable of changing musical

1993-09-16

1996-04-16

Shoop, Jr., William M.

Music

Instruments

Electrical musical tone generation

84617, G10H 700

Patent

active

055084699

ABSTRACT:
A musical tone synthesizing apparatus comprises a digital signal processor (i.e., DSP), a main memory and a sub memory. The main memory stores main instructions, while the sub memory stores sub instructions. In accordance with the main instructions and the sub instructions, the DSP performs several kinds of arithmetical operations in a time-division manner. Herein, the main instructions embody algorithms representing a sound source which contains a non-linear table. The contents of the non-linear table represents a non-linear characteristic of a musical instrument to be simulated. Values to be stored in the non-linear table are calculated in accordance with a predetermined mathematical computation utilizing a series expansion, a recurrence formula and the like. By rewriting the contents of the non-linear table, a non-linear characteristic to be applied to musical tone signals is altered in real time. Incidentally, the sub instructions are used to perform several kinds of operations such as an operation of rewriting the contents of the non-linear table and/or a low-pass filtering operation.

REFERENCES:
patent: 4747332 (1988-05-01), Uchiyama et al.
patent: 4984276 (1991-01-01), Smith
patent: 5248844 (1993-09-01), Kunimoto
patent: 5383386 (1995-01-01), Kudo et al.

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