Have you already tried Polyphone??
It seems that I can convert SF2 to SFZ by this.
- File >> Open (SF2)
- File >> Export soundfont (choose SFZ format)
- “Import Multi-Sample” in the Keyzones preset menu.
(Ah,now I notice thatsimply I can load sfzfiles from browser)
I use Polyphone for converting as well. Quick, easy, and you can do batch conversions of multiple sf2 files into their own folders filled with the sfz files and raw samples. I can vouch for this program (flipping amazing to have soundfonts in Renoise now because of it, and the Renoise Team of course.
This is the best free / grey orchestral library ive ever heard. It would be amazing to have it in renoise.
So many files that convert one by one would be horrible.
Definitely use it to convert that library, it will take under 30 seconds to load up your soundfonts and convert them all once you know how it works, and it works pretty simply lol