Writes Brian Dunaway:

I adore Opera, love Country and Western, have grown to cherish Bluegrass, and was weaned on Rock & Roll … but I have found little that might surpass the pure unmitigated joy and freedom (or do I repeat myself) of the “dueling” guitar solos of Dickey Betts and Duane Allman in the Southern Rock anthem Blue Sky. As the cosmos would have it, the car radio was playing that song as I departed my last day of employment before seeking new horizons. 

See here.

The Allman Brothers Band – Blue Sky (Eat A Peach, February 12,1972) (youtube.com)