Music – Instruments – Electrical musical tone generation
Reexamination Certificate
2011-05-24
2011-05-24
Warren, David S. (Department: 2832)
Music
Instruments
Electrical musical tone generation
C084S630000, C084S662000, C381S063000, C708S300000, C708S315000
Reexamination Certificate
active
07947891
ABSTRACT:
A product-sum operation circuit has delay circuits of the first to the (n−1)th stage for delaying musical tone data, multiplying circuits60-6(n−1) for multiplying the musical signal data or the delayed musical signal data output from the delay circuits by impulse response coefficients, and adders71-7(n−1) for summing up data output from the multiplying circuits. The product-sum operation circuit is provided with a feed back circuit. The feed back circuit includes a multiplying circuit80that receives the delayed data from the delay circuit at the (n−1)th stage and multiplies the received data by a multiplication coefficient, and an adder81for adding data from the multiplying circuit80to the delayed data from the delay circuit at the “p”th stage.
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Casio Computer Co. Ltd.
Holtz Holtz Goodman & Chick PC
Warren David S.
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