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AIC3254 Control Software

The Small Speaker EQ section, contains filter presets that are suitable for small speaker applications.

Emphasizing certain frequencies and reducing low-frequency energy provides higher volume with less

distortion and more intelligible speech and music for small speakers. These presets use the first seven

biquads of the cascade for filtering whereas the rest of the 13 graphic equalizer sliders can be used to

emphasize other frequencies. This feature is enabled by setting the green ON/OFF switch to ON.

Although an option is available to program the codec for this feature when the panel pops up, provision is

made to re-program this miniDSP application by clicking the Program EQ into miniDSP button.

Figure 14. Equalizers miniDSP Application

4.1.3.2 Spectrum Analyzer

The 20-Band Spectrum Analyzer provides a visual representation of the frequency content of the input

signal (Figure 150. If Both Channels is selected in the selection box below the display window, the

AIC3254 CS polls the registers related to both channels. To enable polling, set the ON/OFF switch to ON.

Modifying the DAC volume control does not affect the spectrum reading because the analysis is done

before the DAC volume control.

Although an option is available to program the codec for this feature when the panel pops up, provision is

made to re-program this miniDSP application by clicking the Program Spectrum Analyzer into miniDSP

button.

SLAU264A–October 2008–Revised September 2012 TLV320AIC3254EVM-K

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