SLOU590 January   2025 TAS5802 , TAS5815

 

  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
    3. 2.3  Process Flow 2
      1. 2.3.1  SRC
      2. 2.3.2  Input Mixer
      3. 2.3.3  Equalizer
      4. 2.3.4  Volume
      5. 2.3.5  DPEQ
      6. 2.3.6  3-Band DRC
      7. 2.3.7  AGL
      8. 2.3.8  Clipper
      9. 2.3.9  Output Crossbar
      10. 2.3.10 DSP Memory Map
    4. 2.4  Process Flow 3
      1. 2.4.1 SRC
      2. 2.4.2 Input Mixer
      3. 2.4.3 Equalizer
      4. 2.4.4 Volume
      5. 2.4.5 DPEQ
      6. 2.4.6 2-Band DRC
      7. 2.4.7 Clipper
      8. 2.4.8 Output Crossbar
      9. 2.4.9 DSP Memory Map
    5. 2.5  Process Flow 4
      1. 2.5.1 SRC
      2. 2.5.2 Input Mixer
      3. 2.5.3 Equalizer
      4. 2.5.4 Volume
      5. 2.5.5 DPEQ
      6. 2.5.6 3-Band DRC
      7. 2.5.7 Clipper
      8. 2.5.8 Output Crossbar
      9. 2.5.9 DSP Memory Map
    6. 2.6  Process Flow 5
      1. 2.6.1  SRC
      2. 2.6.2  Input Mixer
      3. 2.6.3  Equalizer
      4. 2.6.4  Volume
      5. 2.6.5  DPEQ
      6. 2.6.6  2-Band DRC
      7. 2.6.7  AGL
      8. 2.6.8  Clipper
      9. 2.6.9  Output Crossbar
      10. 2.6.10 DSP Memory Map
    7. 2.7  Process Flow 6
      1. 2.7.1  SRC
      2. 2.7.2  Input Mixer
      3. 2.7.3  Equalizer
      4. 2.7.4  Volume
      5. 2.7.5  DPEQ
      6. 2.7.6  3-Band DRC
      7. 2.7.7  AGL
      8. 2.7.8  Clipper
      9. 2.7.9  Output Crossbar
      10. 2.7.10 DSP Memory Map
    8. 2.8  Process Flow 7
      1. 2.8.1 SRC
      2. 2.8.2 Input Mixer
      3. 2.8.3 Equalizer
      4. 2.8.4 Volume
      5. 2.8.5 DPEQ
      6. 2.8.6 2-Band DRC
      7. 2.8.7 Clipper
      8. 2.8.8 Output Crossbar
      9. 2.8.9 DSP Memory Map
    9. 2.9  Process Flow 8
      1. 2.9.1  SRC
      2. 2.9.2  Input Mixer
      3. 2.9.3  Equalizer
      4. 2.9.4  Volume
      5. 2.9.5  DPEQ
      6. 2.9.6  3-Band DRC
      7. 2.9.7  Clipper
      8. 2.9.8  Output Crossbar
      9. 2.9.9  DPEQ
      10. 2.9.10 DSP Memory Map
    10. 2.10 Process Flow 9
      1. 2.10.1  SRC
      2. 2.10.2  Input Mixer
      3. 2.10.3  Equalizer
      4. 2.10.4  Volume
      5. 2.10.5  DPEQ
      6. 2.10.6  2-Band DRC
      7. 2.10.7  AGL
      8. 2.10.8  Clipper
      9. 2.10.9  Output Crossbar
      10. 2.10.10 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 3-Band DRC
      1. 3.5.1 DRC Time Constant
      2. 3.5.2 Crossover
    6. 3.6 2-Band DRC
      1. 3.6.1 DRC Time Constant
      2. 3.6.2 Crossover
    7. 3.7 AGL
    8. 3.8 Clipper
    9. 3.9 Output Crossbar
  7.   A Appendix
    1.     A.1 DSP Memory Map for Process Flow 1, 3, 5 and 7
    2.     A.2 DSP Memory Map for Process Flow 2, 4, 6 and 8
    3.     A.3 DSP Memory Map for Process 9

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 uses to determine the average signal energy, and therefore where the incoming signal compares to the set DRC curve. It is beneficial to have control over the DRC time constant for a given frequency band to avoid beating tones caused by the DRC attack and the incoming signal frequency.

The mixer gain controls the relative gain of each of the 3 frequency bands after the DRCs when they are mixed together. This is used to attenuate one of the frequency bands relative to the others, if needed. Make note of the sign of the gain coefficients. Because filters affect phase, a phase reversal or a 180 degree phase shift may be necessary. Use a negative sign on the coefficient to reverse the phase for the second order LR filter.