I know this is a basic one but I've always been curious what the "official" distinction is between the different kit types in expansions, i.e. digital vs. analog vs. hip-hop etc. Every time I think I understand it, I open a kit that doesn't seem to follow that rule I'm imagining. Maybe there isn't a hard and fast rule and it's just up to the expansion producers to categorize?
Some are more obvious (melodic vs. special for example) but digital seems to be the main one I can't figure.