BERLIN, GERMANY – AUGUST 13: Colored flexi discs are seen on display at the "Bone Music – The X-Ray Audio Project" exhibition at Villa Heike on August 13, 2021 in Berlin, Germany. The exhibition, about the underground community of music lovers and bootleggers who defied censors in the Cold War-era Soviet Union through the manufacture and distribution of their own recordings of forbidden music such as "Rock Around the Clock," "Boogie-Woogie Bugle Boy" and "Lullaby of Birdland" by recording not only onto discarded x-rays but also other round items such as road signs and circular cake stands – affordable replacements when more conventional materials like shellac and vinyl were scarce and controlled – runs until September 5. (Photo by Adam Berry/Getty Images)
SAN FRANCISCO, CA – APRIL, 1970: Leslie West and Felix Pappalardi of the music group Mountain perform in April, 1970 in San Francisco, California. (Photo by Robert Altman/Michael Ochs Archives/Getty Images)
Atlanta – June 1: Fleetwood Mac, Rock and Roll Hall of Fame (Class of 1998) Singer/Songwriter Stevie Nicks performs at The Omni Coliseum in Atlanta Georgia June 1, 1977. (Photo By Rick Diamond/Getty Images)
STERLING HEIGHTS, MI – JUNE 18: Charlie Daniels of the Charlie Daniels Band performs at Freedom Hill Amphitheater on June 18, 2015 in Sterling Heights, Michigan. (Photo by Scott Legato/Getty Images)