System Information
Operating system: Win 10 Home
Graphics card: NVIDIA GeForceGTX960
NVIDIA High Definition Audio

Blender Version
2.80 Release Candidate
Worked: (optional)

Short description of error
If I open Blender and add Sound or Music Files in the video editing mode I dont hear those sound files being played during playback. However if I choose to render as a movie (FFmeg) and assign an audio codec it is included in the rendered video file. I couldnt find anything regarding this new version and this bug online anywhere. The same also happened on the device I use at uni.

Exact steps for others to reproduce the error
Just add sound or music to the VSE