• State
  • Locked Locked
  • Replies 3 replies
  • Subscribers 32 subscribers
  • Views 649 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

TAS2563: Volume control

V M
Prodigy 40 points
Part Number: TAS2563

I followed the post that outlines how to set the volume registers to control volume. I used the max volume outlined in the datasheet(DVC_PCM 0x5092 BEE4), but that did not seem to affect the volume of the sound. I'm running in ROM mode, so I just turn on the chip and start sending data over I2S. I verified that the default reading of volume is read as outlined in the datasheet(0x4000 0000), and it gets bumped to the max value(0x5092 BEE4). Is there something else that needs to be done to change speaker volume?

  • 0
    TI__Prodigy 300 points

    Hello,

    There are a few things that TI would recommend for the Smart Amp tuning process in PPC3. It is recommended to start by tuning input gain first. This is located at the upper right-hand corner of the Audio Processing page (and is denoted by the volume icon). Tuning this first could help increase the overall volume. However, it is possible that if input gain is set too high then additional distortion will occur, so it is important to experiment with what sounds best for your application.

    After input gain, DRC can also help with output volume. DRC is also in the Audio processing page. TI recommends a level of –20 dB with a ratio of 4:1 for the threshold portion of DRC. TI also recommends a makeup gain of 0 dB to 2 dB. Another thing that you could try here is to reduce the input gain from earlier while increasing the makeup gain in order to increase volume.

    Let me know if any of these steps worked for you in increasing the volume. If they didn't, I will keep looking for additional ways.

    Thank you,

    Elizabeth Weichel

  • 0 in reply to Elizabeth Weichel
    Prodigy 20 points

    Hi Elizabeth, 

    I am interested in adopting your DRC settings in an attempt to increase output volume without causing distortion. Can you help me understand what you mean by "TI recommends a level of –20 dB with a ratio of 4:1 for the threshold portion of DRC"? 

    I am looking at the DRC configuration and am at a loss at how to apply your suggestion.

    Thanks

  • 0 in reply to Tianyu Zeng
    TI__Prodigy 300 points

    Hello Tianyu,

    My apologies for not being more clear before. The values within the Threshold, Offset, and Ratio columns can be experimented with. However, above your high frequency graph, there is the "DRC Make-up Gain (dB)" section. It is recommended to keep this between 0 and 2 dB. My first recommendation is to change the Region 2 row on your high frequency graph to [-20, 0, 4]. Try experimenting with that, and if it still is not sounding optimal, let me know.

    There is an article about Smart Amp tuning/DRC guide that you may find helpful: https://www.ti.com/lit/an/slaa751/slaa751.pdf?ts=1628176645489&ref_url=https%253A%252F%252Fwww.ti.com%252Fproduct%252FTAS2563

    Thank you,

    Elizabeth Weichel