Datasheet

AIC36 Control Software

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Figure 11. DAC Biquad Filter Tool

To test the filters with USB Audio, select a configuration from the 'Typical Configurations>Playback' panel.

The 'Stereo DAC Playback' configuration is optimized for any 'Filter A' processing block. Alternatively, a

custom script can be loaded into the Command-Line Interface panel before downloading coefficients. This

tool assumes that Adaptive Filtering is enabled for real-time filtering.

Step 1: Select the Processing Block - This specifies the number of biquads available and stereo or mono

(left). For best results, use Processing Block PRB_P2 as this works well with the default EVM setup. To

change the processing block on the device:

1. Go to the 'Analog Settings>Audio Outputs' panel to uncheck the 'Enable DACs' box.

2. Go to the 'Signal Processing>Processing Blocks' panel to select the DAC processing block.

3. Go to the 'Analog Settings>Audio Outputs' panel to check the 'Enable DACs' box.

Step 2: Specify the Sample Rate - This is a key design parameter input to the Biquad Tool. The default is

44.1kHz which is the sample rate used on the EVM. The tool will work with any sample rate from 8kHz to

96kHz, however, if a sample rate other than 44.1kHz is selected then the user must go the the clock panel

to modify the PLL and/or clock settings so that the desired sample rate is setup properly when used with

an external audio interface.

TLV320AIC36EVM-K SLAU280A–March 2009–Revised October 2012

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