Are you using the command line version or the gui version? The biggest difference from most other coin clients code is in the GUI version, which has sound support. I'll try and get a 14 machine up today and see what happens.
Gotcha!
Commented out the contents of PlaySound() in guiutil:cpp: it works now. Not sure what is wrong with my phonon lib then (I noticed there are a few installed on my machine - messing up with qt4 vs qt5 I guess). Thanks for the tip!

Glad you're up and running!
I am VERY curious what is causing the problems though. Do you have both qt5 and qt4 build environments set up? Do you have a backend installed for libphonon? Did you get any build errors or warnings centered around the sound functions? If you have a couple of minutes, let me know.