I purchased some Logitech speakers (S120). I have two different problems, I think. First, my computer doesn't seem to recognize the speakers as Logitech. When I click on the speakers icon, it shows as IDT High Definition Audio CODEC. When I double-click on that speaker icon and get the properties window and go to the advanced tab, then click the test button, I get sound out of the Logitech speakers, However, when I try to play any sounds or music, there is no sound from the speakers. Problem #2 is that my monitor also has speakers, which are not very good or I wouldn't have bought the Logitech speakers. They show up alongside the other speakers (shown as IDT) when I click the speaker icon, but I mute them while I test the other speakers. I don't know if they are causing some other problem having to do with the Logitech speakers or not, in spite of being muted.
My computer is an HP Envy, and I'm running Windows 8.1.
Any help would be greatly appreciated.