Does anyone remember Muddy Waters’ album Electric Mud (1968)? Or Howlin’ Wolf (1969)?
The two were the attempt to cash in on the psychedelic music boom but in the process insulted two of the great icons of blues music. The side musicians were the Rotary Connection (whose own LPs are now valued highly). Worth listening to for shock value.
https://www.amazon.com/Electric-Mud-Muddy-Waters/dp/B000002OCP
Joe Bonamassa tribute concert into.
https://www.youtube.com/watch?v=c1fIpH0j3aU
The psychedelic sound originated with the use of LSD and had it's beginnings in The Haight Ashbury in San Francisco and was pioneered by groups like The Jefferson Airplane, Quicksilver Messenger Service and The Grateful Dead. Among all of these The Grateful Dead were the masters of this sound.