The ecw files aren t soundfonts They are Ensoniq Concert Wavetable sound sets and are in a completely different and unknown format Ensoniq never bothered to release information on them so no one was ever able to make a custom set to my knowledge You can not load a Soundfont in DOS on an Audigy SBLive due to the use of this Ensoniq driver btw SoundFonts are an E mu technology and are only supported in Windows never in DOS Even on a ISA SBAWE32 you had to load them in Windows if you wanted to use them with a DOS game Tricky