Interesting enough, there is an interesting difference between Pulseaudio and
Pipewire in the output of
$ pactl list cards | grep -E '(Profile|available:)'
With Pulseaudio:
Profiles:
HiFi: Play HiFi quality Music (sinks: 3, sources: 2, priority:
8000, available: yes)
off: Spento (sinks: 0, sources: 0, priority: 0, available: yes)
Active Profile: HiFi
With Pipewire:
Profiles:
off: Spento (sinks: 0, sources: 0, priority: 0, available: yes)
HiFi: Play HiFi quality Music (sinks: 3, sources: 2, priority:
8000, available: no)
Active Profile: off
The "HiFi" profile is not available with Pipewire; the profile can still be
selected manually with the command
$ pacmd set-card-profile alsa_card.usb-Generic_USB_Audio-00 HiFi
which makes the card work perfectly.
As I described in my first message, in Gnome the working profile is not
automatically selected (but can be selected manually: Gnome allows the
selection of "not available" profiles), while in KDE Plasma only available
profiles can be selected.
