Steamlyannaya Hamonika (1968) depicts the isolation and brutalization of humans in modern bourgeois society. Although being broadly in line with other art-as-propaganda of the era, censors felt it could easily be read as a criticism of the party, leaving this subversive short as the only animated film to be banned in the Soviet Union.
Apparently it's a parody of the short film Стеклянная гармоника, or The Glass Harmonica. It's very modernist, kind of like an animated Guernica in places, and with a score equal parts avant-garde like George Crumb's Black Angels or Penderecki's Threnody for the Victims of Hiroshima, and some parts more akin to a Romantic era symphony.
The video I linked to also insists that it was a secret criticism of the lack of spirituality in the USSR which seems like absolute bullshit to me as it was hardly subtle about the spiritual aspects, and if it had been intended as a criticism, it would almost certainly have been banned (not to mention the fact that there is a kind of spiritual aspect to communism which is divorced from religion, and that's what I believe the film is getting at). Here is a better quality version without English tranlsations of the text at the beginning.
Its funny, watching any of it it is super clear on its message. Capital destroys the harmonica and arrests the musician. The narc gets paid for ratting out someone who holds beauty. The masses are bound by time to destroy the machine that creates.
One coin creates familial conflict, while one guy literally baths in coins. Its so on the nose, you have to purposefully misread it to miss the point.
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