I've connected a Windows laptop through the same displayport cable and the audio worked fine. If I connect my Ubuntu 20.04 computer however, the speakers output no sound. Plugging in earphones work fine though. The monitor is LG 32UD59-B. My graphics card from which I'm connecting the DP is a R9 280 I believe.

I've gone through Alsamixer and played around with pretty much every permutation. I've also played around in Pavucontrol.
Something odd is that pavucontrol says that audio is playing through the display port, however, the speakers emit no sound.

Something odd that I found in Alsamixer is that I have an extra soundcard for HDMI?
Though when I go into it, it's pretty empty.