Hi,
  When Wireshark 4.0.0 was released, users reported 
https://gitlab.com/wireshark/wireshark/-/issues/18413. I verified it and 
it really happens, but I have no idea why:
1) It looks that Qt 6.x is the reason. Build with Qt 5.x works fine. But 
Qt 6.x code for audio play is very different because of Qt 6.x 
Multimedia API changes.
2) Same code for Qt 6.x works on Linux and probably on Mac, just Win32 
do not work. On the other hand I found no #ifdef WIN32 in related code. 
So probably Qt 6.x on Windows is more sensitive to something.
3) I tested Qt 6.2.3 (used for production) and 6.3.1 in my development 
environment. No difference.
4) I checked Qt bug database and found no related issues.
5) I tested v4.0.0 tag and master, none of it works. There is high 
probability that it do not work on Windows with Qt 6.x for longer period 
and I didn't noticed it - I'm mainly developing on Linux.
6) All other and audio related functions works fine so it looks that the 
wireshark code is correct.
Any ideas or advices are welcomed.
					Best regards,
						Jirka Novak