Electrical audio signal processing systems and devices – Sound effects – Reverberators
Patent
1990-02-08
1991-11-12
Isen, Forester W.
Electrical audio signal processing systems and devices
Sound effects
Reverberators
84630, 84DIG26, H03G 300
Patent
active
050654330
ABSTRACT:
An audio signal data processing system comprises an input device sequentially supplying incoming audio signal data, a data memory control device writing and reading-out the audio signal data into and from a data memory, a delay memory control device sequentially reading-out the audio signal data from the data memory and storing the data into a delay memory and sequentially reading-out the audio signal data from the delay memory and writing the data into the data memory, an arithmetic device multiplying predetermined coefficient data by the audio signal data having been read-out by the delay memory control device and written into the data memory and summing up results of the multiplication. The arithmetic device includes a plurality of multiplication and summing devices multiplying coefficient data by the audio signal data for each of data groups which are obtained by grouping a predetermined number of the audio signal data read-out by the reading device sequentially in the order of reading and subsequently summing up the multiplied values, and a filter device for executing a filter characteristic operation for calculated values respectively obtained by each of the multiplying and summing device, wherein a filter characteristic of the filtering device is made adjustable.
REFERENCES:
patent: 4392405 (1983-07-01), Franz et al.
patent: 4570523 (1986-02-01), Futamase et al.
patent: 4586417 (1986-05-01), Kato et al.
patent: 4803731 (1989-02-01), Niimi et al.
Hayashi Kazuhiro
Ida Kazunaga
Iizuka Tatsushi
Ishihara Hiroyuki
Matsumoto Yukio
Chen Sylvia
Isen Forester W.
Pioneer Electronic Corporation
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