I have tried making a regular phone call and using the duo app on android but both of them seems to dampen out non-vocal frequency ranges which makes it really hard to hear my father play the violin or guitar and me to play along. It is like it works for one second but then some kind of misplaced adaptive noise cancelling sets in and ruins the phone call.

Is there any android app you can use for real time calls which does not equalize away the instruments? I just want to play along with my dad, it should not be this hard...

  • Hi. Have you tried switching off the "Noise reduction" setting under "Call Settings" for Android?
    – Z Z
    Nov 2, 2021 at 8:25
  • Unfortunately my settings are in swedish so I don't know how they translated that. I don't find "brusreduktion" which would be the obvious translation.
    – Emil
    Nov 2, 2021 at 11:40
  • There is a setting called "Hörapparater" (hearing aids) which I have turned off, could it be that one?
    – Emil
    Nov 2, 2021 at 11:51
  • On my old Android it is under "Ringtone and sound settings" via "Call Settings". I can't guarantee it will solve your problem but it is good to try it first as it says "Suppresses background noise from your side during calls". You'll need to untick it.
    – Z Z
    Nov 2, 2021 at 12:43
  • I do not seem to have that setting. Perhaps it was removed in SG S20.
    – Emil
    Nov 4, 2021 at 4:28

1 Answer 1


When non-speech audio gets "muffled", most likely the cause is not client-side filtering but compresssion codec in use that is optimized for speech.

I recommend to use an app that supports explicitly controlling the codec used.

Concretely I suggest to install BareSIP+, create a SIP account somewhere that promises to support the codec AMR-WB, and when configure the account profile to only enable the AMR-WB codec.

Both ends of the conversation must use SIP and both clients need to support AMR-WB, but it should be enough that one of the clients is configured to only support that one codec - then the other client should detect that and use the same automatically.

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