Version 1.08.12 is widely cited as the for specific legacy game engines:
As an audio middleware tool, FMOD 1.08.12 provides a bridge between sound designers and game engines like and Unreal Engine . fmod 1.08.12
FMOD 1.08.12 is not the version you choose for a new AAA game or a mobile app targeting modern stores. But for: Version 1
Modders must use version 1.08.12 to create compatible sound banks ( .bank files). Newer versions of FMOD Studio are generally incompatible with the game's audio pipeline. fmod 1.08.12
"When we ported our 2011 game to Switch, we had to emulate the FMOD 1.08.12 API because the original binary assets were tied to specific DSP behaviors. It was easier than updating 10,000 sound calls." — Anonymous Porting Studio