I think that we are going to agree that this one is on Sony, but I thought to share this here in case anyone would start getting reports like we do.
Sony has a feature on their Xperia phones called DSEE that is supposed to enhance the sound. It’s been around for a while and isn’t a problem as such, but recently they added the AI twist to it and the problem is that it renders FMOD completely silent without any way to detect this setting.
Once disabled in the phone settings, sound works again through FMOD.
As far as I can tell, this impacts only Xperia models which are “DSEE Ultimate” compliant (that seems to the 1, 5, and 10 Xperia series from 2020 and onward). It might also be a problem only limited to Xperia on Android 15.