iTunes

It's okay, I am wearing my reading glasses and can read normal font. 🙂

Have you restarted your computer?

Is sound only missing in iTunes and not in other applications of system notices?

I have the same problem and have tried restarting ive also had the same problem with soundcloud

Just realised my problem i was still on airplay with apple T.V so now fixed phew.Check top left it's not blue in colour.