Texas Instruments TAS5731EVM, Руководство пользователя, Страница: 13 / 26

www.ti.com
Using the GUI Software
3.4 Using EQ Function
The Bi-Quad registers in the TAS5731 can be programmed for EQ and other signal processing
applications using the BQ blocks on the GUI. Commonly used signal processing functions are EQ, Treble-
Shelf, Bass-Shelf, Low-pass and high-pass filters. In particular, the EQ function can be used to equalize
(hence the name EQ) a speaker’s non-ideal frequency response. The BQ blocks on the GUI are
highlighted in the
Figure 14 .
Figure 14. TAS57xx GUI EQ Blocks
When a BQ-block is selected on the GUI by using a single mouse click, the device registers associated
with that particular BQ block are displayed in the properties window. Double-Clicking on the BQ-block,
opens up the ‘Filter creation tool’ window. The
Figure 15 shows the filter-creation window corresponding to
block BQ1, where eight Bi-Quad registers are available for programming. Each of these can be
independently programmed by using the corresponding entry fields. The default setting for all Bi-Quads is
All-Pass mode. The different filter options available are seen in the drop-down menu in Fig 15. The
frequency and phase response of the filters can be viewed using the frequency and phase response tabs
of the filter tool. Finally, when the APPLY button is clicked, the Bi-Quad registers of the device are
updated with the programmed settings.
13 SLOU331A – December 2011 – Revised August 2014 TAS5731EVM Evaluation Module
Submit Documentation Feedback
Copyright © 2011–2014, Texas Instruments Incorporated