Texas Instruments TLV320AIC3107EVM-K quick start Digital Effects Filters, Shelf Filters

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TLV320AIC3107EVM Software

4.9.3Digital Effects Filters

The digital effect filters (the biquad filters) of the TLV320AIC3107 are selected using the check boxes shown in Figure 19. The de-emphasis filters are described in the TLV320AIC3107 data sheet, and their coefficients can be changed (see Figure 17).

Figure 19. Enabling Filters

When designing filters for use with TLV320AIC3107, the software allows for several different filter types to be used. These options are shown on a tab control in the lower left corner of the screen. When a filter type is selected, and suitable input parameters defined, the response are shown in the Effect Filter Response graph. Regardless of the setting for enabling the Effect Filter, the filter coefficients are not loaded into the TLV320AIC3107 until the Download Coefficients button is pressed. To avoid noise during the update of coefficients, it is recommended that the user uncheck the Effect Filter enable check boxes before downloading coefficients. Once the desired coefficients are in the TLV320AIC3107, enable the Effect Filters by checking the boxes again.

4.9.3.1Shelf Filters

A shelf filter is a simple filter that applies a gain (positive or negative) to frequencies above or below a certain corner frequency. As shown in Figure 20, in Bass mode a shelf filter applies a gain to frequencies below the corner frequency; in Treble mode the gain is applied to frequencies above the corner frequency.

Figure 20. Shelf Filters

To use these filters, enter the gain desired and the corner frequency. Choose the mode to use (Bass or Treble); the response is plotted on the Effect Filter Response graph.

SLAU261–November 2008

TLV320AIC3107EVM-K

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Contents TLV320AIC3107EVM-K EVM-Compatible Device Data SheetsUSB-MODEVM SW2 Settings Introduction FeaturesTLV320AIC3107EVM-K Block Diagram EVM OverviewUSB-MODEVM Interface Board TLV320AIC3107EVM-K Block DiagramList of Stand-alone Jumpers Default Configuration and ConnectionsUSB-MODEVM SW2 Settings 2 TLV320AIC3107EVM Jumpers and SwitchesPower Connections EVM Connections TLV320AIC3107EVM-K Setup and InstallationSoftware Installation Quick Start Tabs Quick Start USB-MODEM ConfigurationsTLV320AIC3107EVM Software Quick Start Preset Configurations Tab Quick Start Preset ConfigurationsMain Software Screen Main Software Screen With Indicators and FunctionsDetailed TLV320AIC3107 Block Diagram Audio Input/ADC Tab Audio Input/ADC TabBypass Paths Tab Bypass Paths TabAudio Interface Tab Audio Interface TabClocks Tab Configuring the Codec Clocks and Fsref CalculationUse With PLL Setting ADC and DAC Sampling RatesUse Without PLL GPIO1 Tab GPIO1 TabAGC Tab AGC TabLeft AGC Settings Filters Tab Filters TabDigital Effects Filter ADC ADC FiltersHigh-Pass Filter DAC Digital Effects Filter DAC FiltersDe-emphasis Filters Shelf Filters Digital Effects FiltersAnalog Simulation Filters EQ FiltersUser Filters Preset Filters3.6 3D Effect 10 DAC/Line Outputs TabLine Output Mixers DAC ControlsOutput Stage Configuration Tab HP Output Stage Configuration TabHP Outputs Tab High Power Outputs TabClass-D Output Tab Class-D Output TabCommand Line Interface Tab Command Line Interface TabFile Menu Table A-1. Analog Input/Output Connectors Appendix a EVM Connector DescriptionsAnalog Interface Connectors Analog Input/Output ConnectorsTable A-2. Block a and Block B Digital Interface Pinout Block a and Block B Digital Interface Connectors J16 and J17Table A-3. Power Supply Pinout Power Supply Connector Pin Header, J15TP4 Avdd DAC Appendix B TLV320AIC3107EVM SchematicAppendix B Appendix C TLV320AIC3107EVM Layout Views Figure C-1. Assembly layerFigure C-3. Layer Figure C-5. Bottom Layer Table D-1. TLV320AIC3107EVM Bill of Materials Appendix D TLV320AIC3107EVM Bill of MaterialsNot Appendix E USB-MODEVM Schematic Ti a HIGH-PERFORMANCE Analog Division Table F-1. USB-MODEVM Bill of Materials Appendix F USB-MODEVM Bill of MaterialsDesignators Description Manufacturer Table G-1. USB Control Endpoint Hidsetreport Request Table G-2. Data Packet ConfigurationAppendix G USB-MODEVM Protocol USB-MODEVM Protocol0x12 0xA0 0x02 0x05 0xAA 0x55 0x01 0xA0 0x02 0x05 Table G-3. Gpio Pin Assignments Gpio CapabilityWriting Scripts Writing Scripts FCC Warning Evaluation BOARD/KIT Important NoticeImportant Notice