Found out recently that FL21's update to the Soundfont Player includes different Interpolation settings... none of which make WL4 sound like it should. Even "Crunchy," which comes the closest to sounding right (for the most part), has this stupid Peaking Filter thing going on where resonance is too high in one spot for some reason.
I never thought I'd see the day where SynthFont made WL4 sound better than FL Studio.
I only installed 21 because I need Soundfont Player, and my dumb computer won't open the 32-bit version of FL20 anymore.
My only thought for how to get at The Sound again besides using EQ for every sound channel is to try reinstalling FL 20 and hope that magically lets me use the 32-bit version again (I wish they had x86 for this reason).
However, I worry about that messing with file pathways after 21 carried over all my preferences (especially since 20 and 21 both are yar-har'd copies). Maybe my fears there are unfounded, though?