Electrical audio signal processing systems and devices – Including frequency control – Having automatic equalizer circuit
Reexamination Certificate
2006-03-02
2011-11-29
Chin, Vivian (Department: 2614)
Electrical audio signal processing systems and devices
Including frequency control
Having automatic equalizer circuit
C381S098000, C381S101000, C381S102000
Reexamination Certificate
active
08068621
ABSTRACT:
An apparatus is provided for controlling a graphic equalizer which is implemented by digital filters, each being assignable to a frequency band for regulating a level of the frequency band. In the apparatus, a set of control devices are provided in correspondence to respective frequency bands, each control device being operable to specify the level of the corresponding frequency band to either of a reference level or other level than the reference level. An assignment section operates when a number of the digital filters is less than a total number of the frequency bands, for assigning the digital filters to the frequency bands which are specified with the levels other than the reference level. A control section controls remaining digital filters which are not assigned to any of the frequency bands in a through state. A disabling section operates when the assignment section assigns all of the digital filters to the frequency bands which are specified with levels other than the reference level, for disabling operation of a control device which currently specifies the reference level.
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Digital Audio Mixing System, Information Regarding PM1D, System Software V1.41, CS1D Reference Manual (Software) Ver. 1.41, Yamaha Corporation, Japan, pp. 13-16, entire manual can be accessed online from: http://www2.yamaha.co.jp/manual/pdf/pa/english/mixers/CS1DE.pdf.
Okabayashi Masaaki
Takahashi Shigeki
Chin Vivian
Fahnert Friedrich W
Morrison & Foerster / LLP
Yamaha Corporation
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