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

2.3 Frequency Response Matching

This subsection addresses how the tuner can use the smart amp tuning elements of input gain, EQ, DRC, and smart amp to match the pink noise response of a reference sound source. At this point the user must implement the EVM or prototype device, PPC3 GUI, a microphone, any audio player software, and an audio analysis software tool, such as RoomEQ Wizard.

Use a prepared playlist of reference pink noise audio tracks here starting with 0 dBFS or –6 dBFS and decreasing to –78 dBFS. Most audio processing software can generate these audio tracks. If the reference device has more than one speaker, the user must utilize a left-only or right-only track to avoid measuring the stereo response of the device. Alternatively, ask the TI audio engineer to provide these files. After acquiring these tracks, copy the files to the reference device and open the tracks in an audio player on the PC connected to the target device. TI recommends to make a playlist from the noise tracks on each device.