Why does everything work with regards to recording on the laptop, but not the tower computer? In both cases, system sounds, including videos, sound files, YouTube, etc. are unaffected on either computer please consult the pictures of the Studio Controls settings.
Lenovo Legion 5i i7 laptop with Fedora 33 Cinnamon spin and Fedora Jam installed.
Artlink i9 tower computer with Fedora 33 Cinnamon spin and Fedora Jam installed.
The laptop has a Behringer U-PHORIA UMC202HD USB card connected.
The tower computer has a Behringer U-PHORIA UMC204HD USB card connected.
On the laptop, it is possible to get input sounds through the USB sound card, both voice and bass.
On the tower computer there are no sounds (voice or bass) that go through the sound card and can be recorded. The level meters (green and red lights) do register sound on the USB card, however.
To keep this simple, I have used gnome-sound-recorder for recording. I am using the Jam Studio Controls settings to control all sound on my systems. Both appear to have the same settings. The jack server was not active when I tried to record.