TAS2563: Usage and principles of Audio Processing

Hi Fumiya,

Adding comments on each section below:

• Smart Amp:
  • You can refer to the third video of this series for smart amp tuning section overview: https://www.ti.com/video/series/smart-amp.html#
  • Main things to consider are the protection priorities. You may start by setting all priorities to 1 for a flatter response, then adjust if needed. It is best to test with a variety of test signals such as sine tones, noise of different colors, and music of different genres, sometimes an artifact can occur in only one of these type signals.
  • The Characterization data is already set during the characterization process, usually this is not changed.
• DEQ:
  • This is a combination of an EQ filter and a DRC. The setup is similar to a conventional EQ filter; however, the attenuation is applied dynamically based off the input signal amplitude. If the signal is low the attenuation is less, as the signal reaches full-scale the attenuation reaches the peak value.
  • This feature is usually used to mitigate harsh sounds or physical vibrations associated with specific frequencies.
• DRC:
  
  • The tuning video mentioned above also has good guidelines on how to setup the DRC.
  • Specially for TAS2563 QFN, start by setting the gain of the bands to -1, 1 and 1.
  • DRC tuning is usually one of the last steps of the tuning process, and the purpose is mainly to increase overall loudness while keeping peaks under control using higher ratios at region 2.
• Before and during the tuning process, you can play stepped frequency sine tone, this helps identifying specific problematic frequencies.
• Since you have a reference unit, you can take frequency response SPL plots of the reference at different input amplitude levels, then use that to compare during the tuning process.
• Overall, there is a tuning guideline document available here:  Smart Amp Tuning Guide

Let me know if there's any further specific question.

Best regards,
-Ivan Salazar
Applications Engineer