Audio Dropouts with Beam + LG C3 + Nintendo Switch

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I just set up a new Sonos system (Beam gen 2 + Era 100 surrounds) connected to a new LG C3 TV (65”), and while things are mostly great, my Nintendo Switch seems to cut out for a second every few minutes. Some searching around here and reddit shows some posts from years back with similar issues, but seem to be blaming it on some software update that seems irrelevant today.

my setup:

65” LG C3 TV

Apple TV on HDMI 1 (and has thus far been fine, generally playing Atmos content)

Beam gen 2 on eARC HDMI 2

Nintendo Switch on HDMI 3

Xbox Series X on HDMI 4

Era 100 speakers as rear surrounds (though this problem existed before I set those up)

TV set to "pass through” audio, to use eARC, and the audio output is set to “bitstream"

Nintendo Switch set to “Surround Sound”, which I believe sends 5.1. Sonos app claims it's getting “Multichannel PCM 5.1"

Sonos firmware 15.10

LG software version 03.20.17

The drop outs don't seem to have a super consistent pattern. They could happen once every five minutes, or they could happen just a minute apart. And they only last a second or so. Does anyone know what's going on here, and what I could maybe do to fix it? I'd really rather not switch my Switch back to stereo when I have this nice surround system I could be utilizing!

I saw some people claim (for older model TVs) that using HDMI 1 is a solution, but that doesn't really work when you have multiple devices to juggle!

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Stanley_4Answer

Grand Maestro

You could wait for the problem, submit a diagnostic and contact Sonos support so they can look at the internal data we users can’t see. Maybe it will show another option.

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Stanley_4Answer

Grand Maestro

You could wait for the problem, submit a diagnostic and contact Sonos support so they can look at the internal data we users can’t see. Maybe it will show another option.

E

exchgr

Trending Lyricist I

I had this problem show up out of nowhere yesterday. Exactly every minute, the sound from the Nintendo Switch would cut out for exactly a second.

I fixed it with these steps:

Unplug every HDMI cable from my LG CX, including ones unrelated to the Nintendo Switch or Beam.
Unplug the power to the TV, waiting 10 seconds
Plug the TV power back in and wait for it to boot up and show the “No Signal” screensaver.
One by one, plug each HDMI cable back into the TV, and wait for each one to register and show an input signal (except Sonos Beam, since it’s just ARC). Go too fast and the inputs might get jumbled up, so be extremely patient, and don’t plug in multiple cables at once.

After that, the sound came through uninterrupted for the rest of the night.

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