Update: Sigh. It's not fixed. I was working before supper and back to the old low volume output after supper. No clue. I'm leaving the post below in case anyone has suggestions on what I can do next, if anything.
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We solved an annoying problem with our home stereo and TV. We use a Google Chromecast Ultra to stream content from the basement PC to the TV/stereo. The Chromecast is plugged into the surround receiver so we get surround sound when casting. All was good until a month or so ago when we noticed that the sound level when casting from the PC was down - WAY down. If we had the sound set comfortably and switched inputs without turning it down, we'd get blown out of our seats.
I spent a lot of time trying to fix this, checking the sound settings on the PC, TV, and receiver. No dice. In talking with Nancy about it, I mentioned that there was no sound from the PC speakers and she suggested checking that everything was plugged in properly. It wasn't - the power adapter for the speakers was unplugged. I am not sure why that would make a difference, but it does.
This reminds me of one of the late Jerry Pournelle's aphorisms when he was writing for Byte 30 years ago. It's knows as Pourelle's Law of Cables. "You’ll find by and large, the trouble is a cable."
It's as valid now as it was 30 years ago.
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