Well the problem is iTunes does NOT play it as well. I had only used GIT as I didnt have iTunes on the other PC.
iTunes sees this (properties):
Type: wav-audio (remote) [entfernt in german, I think it means remote as it shows the same for mpeg files which do play]
Stream: 1408 kbit/sec
Rate: 44,100 kHz
Changed: 10.12. etc
BTW if the names look strange I translated this from German iTunes interface. But it gives these values. Doesnt show an error but simply doesnt play.I can even jump to a position but it does nothing, no sound and progress bar doesnt advance.