==being played into a mic is not really acoustic in the original meaning of the word. ==

... and of course the word 'original' here is misused, applied to a new meaning, and by no means the original one. It was a very late adaptation of 'acoustic' to designate unamplified instruments... A bit like the use of 'live', come to think of it ~~ as if amplified instruments didn't make any sound!

~M~