Music – Instruments – Electrical musical tone generation
Patent
1994-07-25
1997-03-25
Shoop, Jr., William M.
Music
Instruments
Electrical musical tone generation
G10H 700
Patent
active
056146850
ABSTRACT:
When a digital signal processor (i.e., DSP) performs a data processing on data stored in a memory (e.g., RAM) in accordance with instructions given from a CPU, data read/write controls are carried out with respect to the data transmitted between the DSP and memory. In accordance with built-in micro-programs, the DSP produces plural musical tone signals in time-division manner. When employing 32-bit data to be processed in the DSP, this 32-bit data is divided into four sets of 8-bit data, which are sequentially written in the memory, for example. Thereafter, the DSP reads such four sets of 8-bit data from the memory, and then, the DSP converts them into the 32-bit data, so that the DSP can perform the predetermined data processing on the converted 32-bit data. Thus, the DSP, employing M-bit data to be processed therein, can be freely coupled with the memory which stores N-bit data (where M.gtoreq.N), as long as "M" is equal to or a multiple of "N".
REFERENCES:
patent: 4794837 (1989-01-01), Katoh
patent: 4809577 (1989-03-01), Fujita
patent: 4916996 (1990-04-01), Suzuki et al.
patent: 5046004 (1991-09-01), Tsumura et al.
Matsumoto Shuuichi
Takeuchi Chifumi
Donels Jeffrey W.
Shoop Jr. William M.
Yamaha Corporation
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