How to eliminate choppy sound

[belmont1990]

Hmm I don't find it similiar because in my case sound is cracking and chopping only in some intense scenes like special attacks in FF Crisis Core, body transitions in 3rd birthday/ some big explosions and flashing.
The problem is sound gets choppy while fps drops below some point, like below 30 fps in native 60 fps games, and below 15-20 for native 30 fps.

For example epsxe emulator have sound option called "async - smooth", which seems to just slow down music and effects instead of making them choppy, and this really boosts those heavy parts on higher settings making them more comfortable to hear.
I'm looking for same solution on ppsspp.