I just did a fresh install of Artemis with Plasma KDE on an 11th Gen Intel NUC that had previously had different Linux’s installed. No issue with sound in the past. Today, however, when I setup the sound to HDMI 5.1 and tired to test the sound I noticed that right was left and left was right for front and rear speakers. Never had this issue before even with EOS or Archlinux.
The simplest way is to physically swap the speakers (or their connections). If that’s not an option, this should help you further.
Thanks for that reference link. I did get this solved, but I don’t know what was really wrong. I reset the PC, TV, and A/V receiver and made sure there was no setting like Multi-channel Stereo on on the AVR.
At that point Plasma KDE Audio settings test and command “speaker-test” both had all 5 speakers correct and the LFE put noise in the sub-woofer.
It would be nice if you’d mark the post that brought you the solution as such.
Oops? I’d thought that @nate’s post above did bring about a solution, but then again, perhaps I didn’t read your post well enough?! - Sorry, maybe I’m getting too old for this.
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