Ya, these demos are sort of first step pre production for that. I've produced stuff before where I was singing for soundtrack projects or for demos to show band mates etc. I've also recorded a bunch of sessions with other singers. I engineered and produced this 4 song EP a few years back in my basement. Thought it turned out great considering. 8 hour mixing with a friend and then my other friend mastered it. - https://headturner.bandcamp.com/album/white-horse-ep