It does not work and it's obvious and I'm not the only one .....
Vast majority of the users, even those that posted here, have found the problem, and in no case it was a GSX problem, the way they fixed it, it was always something else, either the audio mixer, the windows sound notification settings, everything, except GSX.
It would be nice to question you and help us
I don't even know what this sentence means. You ARE questioning me, and I'm keep supporting you, with every possible way to troubleshoot this, even found the time to find an OpenAL to try, suggested multiple solution, at all times of the day. For example, it's 23:40 now, and I AM REPLYING TO YOU so, please stop trying to say you are not supported.
And as I've said, I checked your order, and you bought GSX in 2015 so, clearly, it used to be working on your system. Since nothing in GSX has ever changed in years with regards to audio, the only possible explanation is that something in your audio settings has changed between then and now. A Windows settings maybe, a driver update, I have no idea, I'm trying to give you possible solutions, since it this was REALLY a GSX "problem", it would happen to EVERYBODY, not just 4-5 people in this thread, with several saying they already fixed it.