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Question

Background noise on surround speakers

  • November 16, 2025
  • 2 replies
  • 19 views

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I have a Sonos Beam Gen 1 and 2 Sonos IKEA Symfonisk Bookshelf Speakers connected.

In order to be able to use this set up as my audio source for my Mac mini M4 I have the Mac connected to the Beam using:

  1. Mac connected to a USB C to SPDIF Optical Audio Output Adapter with 192khz/24 bit DAC
  2. This is then connected to the official Sonos Optical Audio Adapter 
  3. This is then connected to an HDMI cable which goes into the Beam.

With thanks to ​@wheee09 who suggested this method in this thread 3 years ago. 

When I use the Apple Music app on my Mac to play music with the USB SPIDF Adapter selected as the source it works perfectly. 

Audio from the browser (Safari and Chrome) also works fine (for example YouTube). 

However when I launch GeForce Now (a gaming service) on my Mac the rear bookshelf speakers have a faint rippling/warbling noise coming out of them. 

Q - does anyone know what might be causing this and if there is a fix? 

The only thing I can think that is different between the three sources I’m using is that the Apple Music app and the browsers are delivering a stereo stream and GeForce Now is delivering a surround sound stream (it’s capable of 5.1 and 7.1). 

BTW - using this set up normally through the Sonos app is fine. 

Thanks in advance.

2 replies

Stanley_4
  • Lead Maestro
  • 12407 replies
  • November 16, 2025

Get the noise, submit a diagnostic.

The Sonos support folks can see what is happening internally, things we users can't see.

CALL Sonos support and have them look at the diagnostic.


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  • Author
  • Enthusiast II
  • 36 replies
  • November 17, 2025

Get the noise, submit a diagnostic.

The Sonos support folks can see what is happening internally, things we users can't see.

CALL Sonos support and have them look at the diagnostic.

Okay I’ll give that a go, thank you.