Band of an instrumental piece played in march 1971 on a FM station from Muncie, IN?

Live version of Conquistador by Procol Harum with Edmonton Symphony Orchestra?

https://m.youtube.com/watch?v=fS67lAT33us

I thought maybe Dixie Dregs, but they were a bit later. 

Emerson, Lake and Palmer's "Pictures at an Exhibition" was released in 1971. It is a classical piece by Mussorgsky. BTW, my father was born just outside of Muncie IN. I used to spend the summers of my youth up there from the early 60's to the mid 70's.

Why not contact the radio station and see if they have either the information or an archive?
B

There’s a great ‘Married... With Children” episode in which Al goes on a far flung quest to find out the name of a song he heard on the radio, “Anna.” It was absurd in the show even though the song had just played in the car on his ride home that day. OPs post takes that absurdity to new and glorious heights...