Audio Effect "Ambience" in FCPX question
I have been working on some old PAL SD footage.The sound track is Dual Mono, I stumbled on an effect called "Ambience" see pic below. I really like this effect as the separation & ambience it creates is amazing. Is there any way I can apply this effect on a stereo soundtrack? I am working on 4K material & this effect seems unavailable.
iMac 21.5″ 4K, macOS 10.15