1968. That was dark music for me. About then my sister got free albums for joining a record club. No Iron Butterfly but a Led Zeppelin album. I may still have that one. I sang along to the radio back then. First car in 1970 and just a AM radio. My Road Runner in 72 got a Craig Powerplay and I wore out The Best of Bread, Doobie Brothers, and Yes 8 tracks along with listening to static free FM. I liked soul music. Back when it was good.