Xbox One X Latest Update Causing Sound Distortion/Compression Problems

So you took off the STB completely out of the equation from the xbox, and the sound did the exact same thing at startup?

This could be another solution to your troubleshooting:

Solution 3: Check how your devices are connected

A good rule of thumb with home theaters is to keep things as simple as you can. In this case, that means using HDMI to plug your set-top box directly to your Xbox One, and your Xbox One directly to your TV.

You also might want to remove any unnecessary devices. HDMI or optical switches, audio-video receivers, converter boxes, and other devices can cause the signal to degrade with each additional pass-through.
You can also try removing devices one at a time to see if one in particular is causing the performance problem

Solution 4: Check your set-top box

Your set-top box may need to be reset to clear out incorrect configuration data. Disconnect any cables—including power—from the device for 30 seconds or more, and then plug them back in.

If you use an over-the-air (OTA) set-top box, check to ensure your HD antenna is connected and working properly. The Xbox One can only display what the set-top box sends it, so poor audio reception from the
antenna will come through on your console.

Some set-top boxes have other settings that may impact audio output. How to check them varies from manufacturer to manufacturer, but generally, be sure your box is outputting digital audio, is set to the correct
surround-sound option for your equipment, and isn’t restricted in any other way.

Contact your hardware provider for assistance in configuring your set-top box.

Try this and let us know if that clears up the sound.

Yes. For additional information, I have my Cable STB going into my Xbox.

Good Evening,

It seems that ever since the latest update was installed on my Xbox One X, every time that I turn the console off and back on again, the sound becomes distorted or possibly is experiencing a compression issue. The only thing that solves this issue is a hard
console reset.

OS Version: 10.0.18362.3055.

I haven't seen any other threads mentioning it on any site.

I am having the same problem, except it isn’t resolving the issue when i hard reset. 😡. Never had an issue before and was working fine a couple hours ago. The sound is fine when the console does the initial xbox x start up and then as soon as the dashboard
comes up it is distorted.

If I wasn't clear before, I'm sorry. Solution 3 is how my Xbox/TV/Cable Box is already setup.

Solution 4 doesn't make much sense to me because the sound distortion affects all TV, Games, and Apps. This only started happening 2 days ago when the update was installed.

Again...the sound distortion only happens AFTER turning the Xbox on again after turning it off.