Duane Allman
In 1968, Carr, Gregg Allman, Duane Allman, Paul Hornsby, and Johnny Sandlin, in a group named Hour Glass, played together on the "Power of Love" album. Also in 1968, Hour Glass recorded songs in Muscle Shoals, Alabama, at Rick Hall's FAME Studios which was known for innovative productions and great sound. One song recording at FAME, "Sweet Little Angel", was later released in a Duane Allman Anthology set.