AKD4955-A Datasheet, PDF (47/89 Pages) Asahi Kasei Microsystems – AK4955 Evaluation Board Rev.3

[AKD4955-A]
13-6. about “Notch Auto Correct”
If the gain of 5-Band EQ is set to “-1”, Equalizer becomes a notch filter.
When the center frequency of two or more notch filters is adjacent, the gap is generated in the center
frequency. When “Notch Auto Correct” button is checked, the center frequency of the notch filter is
automatically corrected. The gain setting of the automatic correction function is effective and only EQ of
“-1” is effective. (Note 24)
Note 24.There is a possibility that the automatic compensation is not correctly done
when the width of the center frequency is smaller than that of the bandwidth setting.
Setting of center frequency: 4400Hz, 5000Hz, 5400Hz / Bandwidth: 200Hz (EQ2~4)
Figure 57. “Notch Auto Correct” function is “OFF”
Setting of center frequency: 4400Hz, 5000Hz, 5400Hz / Bandwidth: 200Hz (EQ2~4)
Figure 58. “Notch Auto Correct” function is “ON”
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2011/08