Linux Guest / No Audio in VBox >= 6.1.24

[aabb]

When using VirtualBox >= 6.1.24 (Windows 10 host, Linux Mint Mate 20.2 guest), audio output does not work. It works with VirtualBox <= 6.1.22.

Audio players, video players, browsers, all seemingly work as intended (e.g., video is shown), just no sound.

I tried the following fix: added the line "options snd-intel8x0 ac97_clock=48000" to the file "/etc/modprobe.d/alsa-base.conf" .

This brought partial improvements: Video is now played with sound -- no matter whether from the internet or my own local .mp4 files. The test "aplay /usr/share/sounds/alsa/Front_Center.wav" works. However, my own .mp3 and .wav files, ripped from CD, still don't produce any output.

I also noticed that when I do "aplay /usr/share/sounds/alsa/Front_Center.wav" and immediately interrupt it with ctrl-z, audio output does work. So it seems this aplay provides some initializations that normally are missing.

Attached two log files: One before applying the above-mentioned fix, one after. There are Audio errors in there; however, I have no idea what can be done about them.