Sound loss of back speakers trying to fix

You could also try simply turning the TV off and then back on or switching the input mode to TV and then back to your 360. I sometimes experience sound loss (not sure what causes it) but this has always fixed it.

Thank you for responding. I did try to set my output options to both 5.1 uncompressed and 7.1 uncompressed and then reverting back to dolby atmos sound. I also re-installed the dolby acces app. Demo content in the app itself plays sound from my height
speakers and the rest of my speakers. I only get this problem when playing games, where only the height speakers are not playing any sound at all. The rest of my speakers have no problem in producing the sound as it should. I will retry changing the settings
as you suggested later this day. Thank you for the help.

I also have experienced the intermittent crackling - BUT only prior to this most recent update (last week; I am in the preview group). Of course, now my surround sound (cable box) doesn't work at all (nothing from the rear channels), so there's that...

I have a 7.1 setup. Out of the box, my One would play surround sound from 5.1 speakers. The funny thing was, for games, it used the left/right surround speakers and for TV, it used the back left/back right speakers... ! The March update worked great,
initially, but now I'm getting no surround from my TV (major bummer). Games seem to be OK (all 7.1 speakers producing sound)...

It's so disappointing that they can't get this right. Sound is super important to me. I hope they fix this - and soon!!!

Well, if your speakers still produce sound, nothing bad happened.

The IR port on the console simply sends out an "on/off" signal. For a speaker it doesn't matter that it's not a "real" audio signal. An analogue sound signal is simply an electrical current that has more or less power depending on the sound being put out
(like an analogue audio wave).

The more electrical power is put through a line, the more the magnet in a speaker will move the membrane of the speaker, causing the air to vibrate and create a sound wave.

So for the speaker it was just a series of "LOUD SOUND - no sound- LOUD SOUND - no sound - no sound - LOUD SOUND..." signal which was alternating quick enough to make it sound like a screeching or buzzing, as the membrane was pushed all the way depending
on the loudness volume you set on your amplifier, then back several times.

In short: As long as you didn't pop your speaker membrane that way, everything will be all right.

Hello, sorry to hear your having problems. I've seen a similar issue when running sound through a receiver. Try changing the sound scheme on the receiver.

Some sound schemes or stages only work or sound right with a specific speaker setup. Ie if the stage uses a middle speaker output for the voice and you do not have a middle speaker.

Hope this helps!