Ok so I recently bought a pair of JBL Quantum headphones and the normal aux cord and the USB adapter works just fine on my PC. However when I went to use Spotify using the USB adapter it would not play. I did some fiddling around and googled some possible solutions and it turns out that Spotify will NOT play any music when it doesn't detect speaker. This is really weird because everything else on my PC is heard when I use the adapter, it is recognized as a headset and everything plays normally. I would really like it if Spotify also acknowledged USB adapters when connected to a headset.