I recently bought a pair of logitech's S-150 speakers to use with my new ubuntu setup. In the sound control pannel, I have "digital output (S/PDIF) | USB AUDIO" and "Analog Output | USB AUDIO". When I try to test either of these, nothing comes out of the speakers. The speakers work on my windows computer, and control the volume of the Ubuntu computer when the volume buttons on the speakers are pressed.
I am at a loss of what to try next. When googling for the problem, I come up with many results from 5-6 years ago, with terminal commands that are obsolete.