By 'single-n' (sorry for being so down-to-the-point, I was busy) I meant the app from the link I had given: Synthfont Viena and not Creative Vienna. There is only one 'n' in its name ! It's supposedly named after some Scandinavian land
The SF2 file didn't show any instruments in the other programs I normally use. Very strange, certainly. Particularly considering that it works in Creative Vienna for you, Maddogg6 and Russ.
The option I had suggested does help with the square wave test case from the thread which I linked. I guess some similarity of this and the other problem is 'shallow', as is my current understanding of what are you talking about guys
Cheers!