No-sound mode in iphone

When I init fmod in my phone(iphone8 12.4.1), I got error “[FMOD] Studio::System::initialize returned ERR_OUTPUT_INIT,defaulting to no-sound mode”

How to solve this issure?

What versions of FMOD and Unity are you using?


Have you disabled the built in Unity audio?

if I disabled the Built in Unity Audio
my Video will not sound!!

Are you able to test with the FMOD logging library to see if it provides any more information?

you may need the information on these pages to enable it: