SLUUDP0 November   2026 TAS5822M

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1General Overview
    1. 1.1 Supported Use Cases
  5. 2Process Flows
    1. 2.1 Overview
    2. 2.2 Process Flow 1
      1. 2.2.1  SRC
      2. 2.2.2  Input Mixer
      3. 2.2.3  Equalizer
      4. 2.2.4  Volume
      5. 2.2.5  DPEQ
      6. 2.2.6  2-Band DRC
      7. 2.2.7  AGL
      8. 2.2.8  Clipper
      9. 2.2.9  Output Crossbar
      10. 2.2.10 DSP Memory Map
  6. 3Audio Processing Blocks
    1. 3.1 Input Mixer
    2. 3.2 Equalizer
    3. 3.3 Volume
    4. 3.4 DPEQ
      1. 3.4.1 DPEQ
      2. 3.4.2 Energy Sense
      3. 3.4.3 Low Level EQ
      4. 3.4.4 High Level EQ
    5. 3.5 2-Band DRC
      1. 3.5.1 DRC Time Constant
      2. 3.5.2 Crossover
    6. 3.6 AGL
    7. 3.7 Clipper
    8. 3.8 Output Crossbar
  7.   A Appendix
    1.     A.1 DSP Memory Map

3.5.1 DRC Time Constant

Change time constants by entering new values for each band. Attack(ms) determines the attack time of the DRC and Release(ms) determines the release time once the windowed energy band passes. Energy(ms) controls the time averaging windowing used to determine the average signal energy, and therefore, how the incoming signal compares to the set DRC curve. Having control over the DRC time constant for a given frequency band is beneficial for avoiding beating tones caused by the DRC attack and the incoming signal frequency.

The mixer gain controls the relative gain of each of the two frequency bands after the DRCs when the frequencies are mixed together. This function is used to attenuate one of the frequency bands relative to the other, if needed. Make note of the sign of the gain coefficients. Since filters affect phase, a phase reversal or a 180 degree phase shift is potentially necessary. Use a negative sign on the coefficient to reverse the phase for the second order LR filter.