Audio has been around since, I suppose, the spoken language. The difference now is distribution and availability. Audiobooks, podcasts, smart phones, voice controlled home speaker systems, connected cars, and who knows what will come next.
Yes, this is a book--and audiobook. Want to get it all in video and walk-you-through-how-to-do-it online course? Listen in.
Don't know where to price your audiobooks? Here you go.
Maybe I just lived in the city too long but I can't get enough of the birds. "You'd think I live in the bird...