Why I ask....
Ever since I started working with Guenter I began making all of my .sf2 versions of soundsets as mono soundfonts. Guenter told me his instruments, when faced with a stereo .sf2 file would only use one channel, I forget if it was the left or right. Anyway, as my sounds do at times use panning effects between the two sides I always converted the .WAV sources to mono to make the .sf2 files.
Any answers are appreciated....