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TAS5782M: Audible clicks

Danilo A.
Mastermind 25665 points
Part Number: TAS5782M

Hi Team,

Our customer used the TAS5782M as the core amplifier in their consumer audio hardware device but they noticed that there are audible clicks when changing EQ settings during the playback. According to our customer,

We successfully implemented the ability for the end user to change EQ settings according to his/her preference.
The loading of each register set of corresponding EQ parameter settings is done from playback software via Linux driver.
However, when changing EQ settings during the playback we observe audible clicks that are not part of reproduced material.

In the E2E thread below, it is suggested to mute the output signal to avoid the pop noise on the speaker, however, muting / unmuting during EQ change is not an acceptable user experience as per our customer.

https://e2e.ti.com/support/audio-group/audio/f/audio-forum/649805/tas5717-tas5717-biquad-transfer-function/2403486?tisearch=e2e-sitesearch&keymatch=TAS5782M%2520pop#2403486

Do we have alternative solution to this audible click issue?

Regards,

Danilo 

  • 0
    TI__Mastermind 35510 points

    Hi Danilo

         As you know our device can only accept I2C communication, it's speed is rather slow. And for the EQ settings, there are a lot of register values need to be changed. Theoretically, you can't avoid this noise mixed into the sound band. Sorry about that.

  • 0 in reply to Shadow He
    TI__Genius 9880 points

    Hi Shadow

    Customer just reached us out and have follow up question on this matter, please see details below.

    "It was suggested to mute the amplifier during the loading of EQ registers.

    My question is: it possible to implement gradual volume fade-out / fade-in before and after EQ settings are loaded into registers, so that volume changes are not unpleasantly abrupt?

    "

    Thank you in advance.

    Regards,
    Maynard

  • 0 in reply to May
    TI__Mastermind 35510 points

    Hi Maynard

       You can try change the volume slowly down or up. There's no automatically fade-out / fade-in.