Program Description
3-20
Figure 3−8. Audio Effects Filter Screen
Different filter coefficients can be loaded for left and right channels, though
usually these are set the same. Six preconfigured filters are selectable using
the drop-down list box of this screen. Selecting one of these updates the
coefficients and causes the graph of the filter response to update. However,
nothing is loaded into the AIC26 until the Download button is pressed.
If changes are made to coefficient values directly, the response can be viewed
on the graph by pressing the View Response button. It is recommended that
you view the response before downloading values to the AIC26, as some
values can cause clipping or oscillation of the filter. The filter equation is
described in the AIC26 data sheet.
Checking the Boost Filter On box enables the filter.
There is another digital filter, the de-emphasis filter, provided by the AIC26 for
the audio DAC. Checking the Deemphasis Filter On box enables the filter.
Moreover, to reduce the AIC26’s power-up pop noise, two pop-reduction
functions were added to the AIC26 and are selectable on this screen. They are
the audio output driver pop-reduction and the audio DAC pop-reduction. Refer
to the data sheet for the details of the pop-reduction features.
Summary of Contents for TLV320AIC26EVM
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Page 15: ...Quick Start 2 3 Getting Started Figure 2 1 Default Software Screen ...
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Page 26: ...Program Description 3 10 Figure 3 1 Data Acquisition Screen With ADC Registers Reading ...
Page 28: ...Program Description 3 12 Figure 3 3 Data Acquisition Screen With Boost Filter Parameters ...
Page 37: ...3 21 Operation THIS PAGE INTENTIONALLY LEFT BLANK ...
Page 39: ...Component Locations 4 2 4 1 Component Locations ...