Hey, soft-rock (read: Linda Ronstadt) lovers, it's Karla Bonoff, recorded live at Municipal Auditorium in 1978. As the blog entry states, soft rock is the "opposite of hard rock." Thanks, internet!
Speaking of hard rock, and of live recordings made in Nashville, and the 1970s, go ahead and grab AC/DC playing live at a record industry convention in 1978. It's ballsy.