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Electronic tone generation apparatus for modifying externally input sound    
United States Patent5136912   
Link to this pagehttp://www.wikipatents.com/5136912.html
Inventor(s)Morikawa; Shigenori (Tokyo, JP); Hanzawa; Kohtaro (Tokyo, JP); Nakamura; Kazuhisa (Tokyo, JP)
AbstractA tone generation control unit has four waveform read/write channels for selectively the reading or writing data in a waveform memory. A plurality of waveform signals stored in the waveform memory are converted into analog signals to be subjected to timbre and tone volume control through voltage-controlled filters and voltage-controlled amplifiers before being fed to a mixing adder. An output signal of the mixing adder is converted into a digital signal which is stored in the waveform memory again through processing of the tone generation control unit. The stored converted output from the mixing adder is later used again as a new sound source waveform which is operated on to produce tones.



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Drawing from US Patent 5136912
Electronic tone generation apparatus for modifying externally input sound - US Patent 5136912 Drawing
Electronic tone generation apparatus for modifying externally input sound
Inventor     Morikawa; Shigenori (Tokyo, JP); Hanzawa; Kohtaro (Tokyo, JP); Nakamura; Kazuhisa (Tokyo, JP)
Owner/Assignee     Casio Computer Co., Ltd. (Tokyo, JP)
Patent assignment
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Publication Date     * August 11, 1992
Application Number     07/663,729
PAIR File History     Application Data   Transaction History
Image File Wrapper   Patent Term   Fees
Litigation
Filing Date     March 1, 1991
US Classification     84/603 84/604 84/622
Int'l Classification     G10H 001/12 G10H 007/02
Examiner     Witkowski; Stanley J.
Assistant Examiner    
Attorney/Law Firm     Frishauf, Holtz, Goodman & Woodward
Address
Parent Case     This is a division of application Ser. No. 07/456,617 filed Dec. 22, 1989 (now U.S. Pat. No. 5,025,700), which is a continuation of Ser. No. 07/336,524 filed Apr. 10, 1989 (abandoned) which is a continuation of Ser. No. 07/162,637 filed Mar. 1, 1988 (abandoned) which is a Division of Ser. No. 902,530, filed Sept. 2, 1986, now U.S. Pat. No. 4,754,680.
Priority Data     Sep 10, 1985[JP]60-200259 Sep 11, 1985[JP]60-201301
USPTO Field of Search     84/602 84/603 84/604 84/605 84/606 84/607 84/602 84/603 84/604 84/605 84/606 84/607 84/DIG. 9 84/DIG. 10 364/419 364/724.01 364/2 364/3 364/4 364/5 364/6 364/7 364/8 364/9 364/10 364/11 364/12 364/13 364/14 364/15 364/16 364/17 364/18 364/19 364/20 364/21 364/22 364/23 364/24 364/25 364/26 364/27 364/28 364/29 364/30 364/31 364/32 364/33 364/34 364/35 364/36 364/37 364/38 364/39 364/40 364/41 364/42 364/43 364/44 364/45 364/46 364/47 364/48 364/49 364/50 364/51 364/52 364/53 364/54 364/55 364/56 364/57 364/58 364/59 364/60 364/61 364/62 364/63 364/64 364/65 364/66 364/67 364/68 364/69 364/70 364/71 364/72 364/73 364/74 364/75 364/76 364/77 364/78 364/79 364/80 364/81 364/82 364/83 364/84 364/85 364/86 364/87 364/88 364/89 364/90 364/91 364/92 364/93 364/94 364/95 364/96 364/97 364/98 364/99 364/100 364/101 364/102 364/103 364/104 364/105 364/106 364/107 364/108 364/109 364/110 364/111 364/112 364/113 364/114 364/115 364/116 364/117 364/118 364/119 364/120 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Patent Tags     electronic tone generation modifying externally input sound
   
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Suzuki
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