Every Song Specific Patch has a demo and tutorial video on the product page where you purchased it here. This demo video includes everything you need to know about the patches including instrument ranges, key, tempo, and how to play it. These patches have a variety of things mapped to the mod wheel like volumes, filters, and fades so that you can easily switch between sections of the song by just using the mod wheel. Their relative volume levels are set as well, so that things are balanced specifically for the song patch.
