Anyway, thanks for the link
Now I think this issue may have something to do with the
AAudio API itself, not FMOD.
(But not sure if it’s Samsung’s or Google’s fault. Also, it may be only my device.)
I unzipped this app’s APK file and had a look at it, but no FMOD related files, which means they are using their own engine or something.
The app also has the AAudio API option.
When I heard the noise within my app (which uses the FMOD API), I switched to the app above and had the same tests with it.
The same noise appeared and disappeared depending on the WiFi states.
Do you know any other Android apps which use AAudio but do not depend on your API?
I could test those too and let you know how it goes with them too.