I'm unable to share computer sounds and music. In some instances, the option to turn it on doesn't remain checked while in others it does, but nothing can be heard anyway. I also noticed that turning it on by default has been known to crash teamviewer upon starting a meeting.
I have the latest realtek drivers for Windows 10 and I have also tried Windows' default audio drivers to no avail. This has been going on for a couple of months now.