Apple TV4 TVoS 15.1.1 - Loss of sound

After lots of head banging I found a solution to no audio that worked for me . It appears the issue is related to the way the hdmi audio is being de muxed.

First test is to move Apple TV to a direct hdmi input like a tv and see if you get audio. I did but when I fed the tos- link into my receiver it was silent. The tos -link in my case came from my 4x1 switch.

I then added a brand new audio exactor into the chain after my 5x1 switch but before my projector and then tos-link from it into my receiver. It’s a 4K/60 exactor so it’s all the latest audio codecs

I have sound !! I haven’t dug deep into if it’s fixed sync too but the fox football game was spot on . The extractor is a Kanex Pro 18g 4K . My guess is this all related to HDCP 2.2 but just a guess.

Good luck !

Audio is still cutting out despite trying every bit of advice I’ve found here and elsewhere online:

• replaced my hdmi with a brand new ultra high speed cable direct from Apple
• bought a new optical cable
• tried every recommended combination of audio and video settings on the tv and the Apple device
• installed a brand new audio extractor that met or exceeded all the specifications for hdmi, hdcp, etc.
• rebooted, reset, unplugged, jumped up and down, turned around three times with my eyes closed, and held my breath

And STILL the problem persists. This has to be a problem with the latest OS.

Thanks, Apple!

I have exactly the same problem after upgrading to 15.1.1. No sound when I plug in my Sony projector the sound stops working.

Tv + AT + reciver = sound.

Projector + AT + Reciver = no sound.

Old AT + Reciver + Projector = sound

I’m having a similar problem, sound cutting in and out. Only step I haven’t taken is a reset. Finally replaced the hdmi with a new high speed from Apple, but the problem persists when running audio through the Samsung hub to my amp via optical cable. So maybe the optical cable is failing? Or the hub? But it certainly doesn’t have anything to do with Apple TV OS update. Because Apple never releases shoddy software. Never. Right?

I had escalated this through Apple and left a detailed message with this info , let’s see if it makes a difference.

I think the key here is HDCP 2.2 and Tos-link and the age of the decoder. My switch/ decoder is HDMi 2.0 444 4/60 but not sure about the HDCP ? So if you have an older extractor or switch that might be the problem. Why it suddenly changed ? Ask Apple

Same issue on TWO Apple TV’s. First one worked fine, then updated to 15.1.1 and I lost sound. Switched to a second one and it worked fine. Then that one got the auto update and the sound immediately stopped working. Very frustrating! And I am sure Apple won’t fix it because they don’t see this as a problem.

Same exact issue !! No sound out of HDMI ..sound works via Bluetooth ..tried two devices

Apple says can't roll back ?is that true ?