Find a soundfont, download it and extract it if needed. Therefore a soundfont whose instruments do not deviate too much from the Sound Canvas ones will likely sound most balanced. Many great game soundtracks were produced with either MT-32 (mostly earlier games) or 'Sound Canvas' type hardware back in the days that Raptor made it's first appearance.
Part of their instruments are weak or downright irritating to begin with. There are many soundfonts to choose from but some do not fit Raptor as well as the others. The method of file extraction from user perspective is the same as with any other file archiver. Sometimes soundfonts are packed with programs like 'SFPack' and 'sfArk' and thus need to be extracted from their archives with corresponding programs (find from internet).
Soundfonts that we are interested in come with the filenameĮxtension 'sf2'.
You won't be getting any audible music with your new fancy software synthesizer if you don't have a soundfont to use with it.