Tattie: All God's "whos" got definitions. I don't see where yours disagree with science about music production. The human voice produces acoustic energy. An electric guitar does not, needs a transducer, or three or four, before ears can even 'hear' the strings.

But, post-production, it doesn't matter if it's coming at them through a PA, radio or computer speaker, consumers will accept it as "acoustic music" if that's how it was made at the other end... no matter how far apart in time or space that may be.