Is there any function that can tell me if a file or just the format is supported by FMOD
The simplest / fastest way to test if FMOD supports a file is to call System::createStream with FMOD_OPENONLY. If it returns FMOD_OK then the file format is supported.
If you are looking for a flat list of the file formats supported then check FMOD_SOUND_TYPE in the docs.
Thank you for the information