Vladimir Vysotsky was a popular singer during this time period and while the state run music publishing house did not publish his music, it was still widely available in this format.<p>E.g. a quote from<p><a href="https://www.newworldencyclopedia.org/entry/Vladimir_Vysotsky" rel="nofollow">https://www.newworldencyclopedia.org/entry/Vladimir_Vysotsky</a><p>"This was also the height of his popularity, when, as described in Vlady's book about her husband, walking down the street on a summer night, one could hear Vystotsky's recognizable voice coming literally from every open window. Unable to completely ignore his musical phenomenon, Melodiya did release a few of his songs on disks in the late 1970s, which, however, constituted but a small portion of his creative work, which millions already owned on tape and knew by heart."
Music on bones... Now it sounds like a joke, but for some people, who were thrown to jails for selling this stuff on Soviet's black market, it sounds literally.