[Malte Müller]

As it turns out, it WAS a new original score (and not like the BATTLESHIP situation), but written many years later, in 1966. And later turned into a tone poem, which is where I first heard it – I think on one of my dad’s classical records.

I did find that tone poem as well but there is no mention it was a film score originally. Infos I found say “composed in 1967 for the 50th anniversary of the October Revolution” only. For example here: https://schostakowitsch.de/Schostakowitsch/Sein-Werk/