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Original question:

TLV320AIC3204EVM-K: EQ parameter debugging of TLV320AIC3204

TLV320AIC3204EVM-K: What are the registers of AIC3204 related to EQ?

Luo Lu
Prodigy 220 points
Part Number: TLV320AIC3204EVM-K

Tool/software:

Hello, same microphone and speaker. After configuring the parameters of EVM with the adaptive filter in the tool, I exported the register configuration of 44,45,46,62,63,64 pages, and wrote it into ALV3204 (our prototype) through the master control. By comparing the sound effects of EVM and prototype, I found that there were differences between them. I wonder if there are any other registers related to the parameters in the adaptive filter screen?

  • 0
    TI__Mastermind 35980 points

    Hi Luo,

    I would try to configure the EVM to be as close to the prototype use case as possible, and copy all register pages to the prototype in order to get the EVM and prototype to sound the same. Things like gain and signal path can affect the final resulting sound.

    To verify the filter is set up correctly, I would try to run a sine sweep through the codec and measure the resulting amplitude (amplitude vs frequency graph).

    Best regards,
    Jeff McPherson

  • 0 in reply to Jeff McPherson
    Prodigy 220 points

    I use HPL and HPR for the left channel, and LOL and LOR for the right channel. If I modify the register configuration on page 44,45,46,62,63,64, the EQ of both channels will change, right?

    regards.

  • 0 in reply to Luo Lu
    TI__Mastermind 35980 points

    Hi Luo,

    The biquads are separated into left and right channels according to the table below:

    Best regards,
    Jeff McPherson

  • 0 in reply to Jeff McPherson
    Prodigy 220 points

    Hi Jeff,

    But I modified the adaptive filter screen and went to the register list, and found that the registers on page 8,9,10 were unchanged, and the registers on page 44,45,46,62,63,64 had changed.Why is that?

    regards.

  • 0 in reply to Luo Lu
    TI__Mastermind 35980 points

    Hi Luo,

    That is because you are using the Adaptive Filter function. This stores the coefficients in a different buffer, waiting for a command to switch which buffer is active. See section 2.3.3.2.7 in the application reference guide for details on this.

    If you do not want to use adaptive filtering so that the coefficients are applied immediately, then you can instead write the same values to the locations in Table 2-9 that I shared above.

    Best regards,
    Jeff McPherson