I can remember Hozosch doing it for example, I asked him about the same thing 2 years ago, cuz I also wanted the old siri voices for it but he couldn't get it to work.
The volume is quite low, NVDA's language is set to Turkish, and I had to record with the default app because GoldWave is broken right now and I didn't want to bother to close my current project and make a new one and then render it to record with Reaper. Still, here's the Siri voices with NVDA 2022.4. It's because I wanted to keep the premium variants for some and the compact variants for some others that they differ from one Siri voice to the other.
The file would play properly on my computer. Could you try downloading it instead and navigating to it via the File Explorer and opening it there instead?
well I just thaught of something. I have a mac with sierra on it. Is it posible I could get the .speach voice files from that mac and then... I know nothing about codeing but maby something could be done? just thaughts.
I'm very very sure people tried that and ofc no result. Mac uses something completely else than windows, and it is a completely different system. Mac is rather close to Linux as far as I know.