In my player I replaced the fmod.dll from Version 1.10.18 to 2.00.06 (both the latest versions).
Seems to run stable, but I cannot hear anything (both with x64 and x32 versions) (Spektrum showing same levels)
I checked the fmod changelogs but could not find anything that could cause this.
So I checked the FMOD_OUTPUTTYPE declarations and found those changed heavily.
Sadly, not only the IDs have changed. My player supports FMOD_OUTPUTTYPE_DSOUND (#6 in 1.10) and FMOD_OUTPUTTYPE_WINMM (#7 in 1.10). Both are now missing.
Due the changed IDs, my player should currently run FMOD_OUTPUTTYPE_WASAPI (#6 in 2.6) or FMOD_OUTPUTTYPE_ASIO (#7 in 2.6) instead.
However I should hear sond, at least with WASAPI? (I have no ASIO software installed)
Running Windows 7 64bit