Have you already tried Polyphone??
http://www.polyphone.fr/index.php?lang=en&page=download
It seems that I can convert SF2 to SFZ by this.
Polyphone
- File >> Open (SF2)
- File >> Export soundfont (choose SFZ format)
Renoise 3.1
- “Import Multi-Sample” in the Keyzones preset menu.(Ah,now I notice thatsimply I can load sfzfiles from browser)
Great tip, thank you
but the polyphone freeze in the moment i open any sf2 (compiled on fedora 24)