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PC "forgets" channels via HDMI passthrough

CMetaphor

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xentr_thread_starter
So this is sorta related to JDs post, but not close enough? Regardless, my google-fu seems to be failing me for this one, because almost every result is "install different drivers" which is Not the solution (afaik).

Background (you can skip this):
So as I catch up with projects started/purchased during covid, I've finally gotten around to swapping in my newer home theater hardware for my bedroom. So I've now got a low profile receiver between my (current) HTPC and my old 1080p until (until I swap in an already -purchased new 4k TV).

The problem:
With the receiver setting the PCs HDMi input as the selected passthrough, the passthrough works fine... but the PC auto-detects (I'm assuming) that the TV does not support surround sound, and downgrades the audio to stereo. This is fine for when I turn off the receiver, and sorta makes sense - the TV only has two speakers (duh). The problem is, when I turn the receiver back on, the PC decides to ignore this, and doesn't reset the audio back to surround sound (5.1 in my case). So the PC is detecting when the receiver goes off and dropping the audio channels to stereo, but doesn't detect the receiver turning back on, leaving me stuck with stereo all the time.

The current fix is just to restart the HTPC when the receiver is on, and after windows loads the PC correctly detects the receiver and gives me surround sound without a problem. A *possible* workaround could be, when the 4k TV is installed, to run all video sources directly to the TV and use the dedicated optical audio out to run the receiver, regardless of source. But that workaround doesn't work for the current 1080p TV, since it's too old to support optical audio out for all TV inputs.

So yeah, googling this has been less than successful. I would like to use the receiver and its upscaling for now - again because the 4k TV isn't installed yet, and I've got a lot of SD content - but having to restart the PC every time I want to switch from a quiet TV show to something newer/louder kinds sucks.

Any suggestions HWC? Thanks as always 👍
 
There are windows powershell and cmd commands you can use to restart services like audio.

Worth a try in this case and can be converted to a batch script later. Beats rebooting the machine.
 
When it's in passthrough, go into the Windows audio settings and do a configure speakers and set it to 5.1 anyways? I thankfully don't have this issue, and I'm fairly certain my monitor doesn't support 6 channel audio.

It might just be the AVR or TV is too old though.
 
xentr_thread_starter
@Izerous that's a good idea, will look into it. Hopefully restart9the service works.

@JD yeah I always manually choose my speaker setup. But even forced to 5.1/6 channels, once the AVR turns off it flips to 2 channels immediately.

Guess I could test it with the 4k TV sooner, just was hoping a guru out there might know a solution to this strange issue. 🤷‍♂️
 
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