In the USSR music was strictly censored. As a kid I had a chance to visit the USSR as a ‘student ambassador.’ A fella named Sasha made friends with me and was so happy to receive my copied cassettes. One was Laurie Anderson’s Home of the Brave. The was particularly exciting as he’d read about her but hadn’t yet heard her. He promised to share the music widely and without cost.
Maybe some went out on X-ray films etched with sound grooves and using a cigarette to burn the center hole like these I saw in New Scientist: