Graphic audio equalizer with parametric equalizer function
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United States of America Patent
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Issued Date -
Jul 29, 2004
app pub date -
Apr 2, 2003
filing date -
Jan 28, 2003
priority date (Note) -
Abandoned
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Abstract
A graphic audio equalizer alters an audio frequency response in selected frequency bands using a plurality of filters of variable level, fixed frequency band and fixed center-frequency frequency. A circuit simulates the operation of a parametric audio equalizer to alter an audio frequency response in the shape of at least one bell curve defined by center frequency, Q-factor and maximum level, the following functions being implemented in the circuit: selection of one of the fixed frequency bands as the center frequency, selection of further fixed frequency bands on both sides of the fixed frequency band which determines the center frequency in order to stipulate the Q-factor, and adjustment of the levels of the further fixed frequency bands on the basis of the maximum level of the fixed frequency band which determines the center frequency in line with the shape of the bell curve.
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