SLAA936A September   2020  – March 2021 TAS2563

 

  1.   Trademarks
  2. 1Introduction
  3. 2Quick Tuning Procedure
    1. 2.1  Initialize Tuning
    2. 2.2  Flatten Protection
    3. 2.3  Frequency Response Matching
    4. 2.4  Microphone Setup
    5. 2.5  Record Reference Device Response
    6. 2.6  Set Input Gain
    7. 2.7  Equalizer
    8. 2.8  Dynamic Range Compression (DRC)
    9. 2.9  Smart Amp Protection
    10. 2.10 Speaker Protection Verification
    11. 2.11 System Signal Chain
    12. 2.12 Tuning Elements
      1. 2.12.1 Input Gain
      2. 2.12.2 Equalizer
        1. 2.12.2.1 Biquads
        2. 2.12.2.2 Dynamic EQ
      3. 2.12.3 Dynamic Range Control
        1. 2.12.3.1 2-band DRC
        2. 2.12.3.2 DRC Test
      4. 2.12.4 Smart Amp Speaker Protection
    13. 2.13 PDM MIC
  4. 3Related Documentation
  5. 4Revision History

2.12.2.1 Biquads

Located under the Audio Processing page, the biquad stage comprises ten biquad filters which feature an array of filter options such as first-order or second-order low-pass and high-pass, notch, bass and treble shelf, and band pass. The configuration options vary by filter type. The most typical filter is the equalizer, where the range can be set as the bandwidth or Q.

Figure 2-15 shows an example setting for a bandpass filter using the EQ control.

GUID-20200819-CA0I-CBQ3-M9H2-VH6GTZL09QBJ-low.pngFigure 2-15 Equalizer and Biquad Control