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 Quick Tuning Procedure

A deep understanding of audio and speaker fundamentals, as well as familiarity with the smart amp device, is extremely helpful toward achieving the optimal tuning but takes time and practice to develop. The goal of this application report is to facilitate rapid implementation of quality audio for any speaker using the smart amp technology, with little audio experience required. This procedure excludes detail on any particular feature to focus on the minimum steps required for any good tuning. This document provides details on certain features and functions, which are referenced and located throughout the document.

This particular section focuses on the common example of reference matching, where the user is attempting to match the acoustic response of the target device to a reference sound source. In some cases the customer has a particular reference device, such as a phone, that has the audio performance and character that they want to replicate in their product. This reference is a great place to start for tuning because it gives the tuner some direction of audio priority as well as some objectivity. In this report, the device under tuning refers to the target device and the reference refers to the reference device. Tuning to match only one speaker at a time is preferable; so, use left-only or right-only tracks on the reference device if possible.

TI highly recommends that the user study the algorithm signal chain before tuning to understand the effect and sequential order of each signal path block on the audio signal. TI also recommends to tune the speaker in the quietest room available for both measurement and listening purposes.