I didn't pay too much attention checking for an Update on my PI4 and just took the latest.
Besides I lost most all my NAS SMB Folders, now my 3.5mm Audio Jack sounds super-crappy.
I added the Headphone Activation line listed above to my config.txt, which did turn on 'headphone'.
The 3.5mm jack is on, but now the audio is really bad. Lots of 'new' static/choppiness in the audio. I'd suppose it's an incorrect Sampling Rate sound?
Then I tried the 'audio_pwm_mode=1' setting. This seemed to make no improvement.
I tried changing the '1' to a '2' and a '3'. That only resulted in a change in 'pitch' of the audio to make boys sound like girls. This may have cleaned up the bad sound, however.
Is there more settings I can try to return the audio to it's pre-Matrix condition?
Thanks!
-KP