Please help me identify a 20th century piano piece - brutalist vibe.

[bachfan]

Several times I have come across (on YouTube) a very hard piano piece, extremely loud, endless semi-quavers (often repeated notes), I'm sure it was included in some compilations of 'hardest piano pieces'. It had a brutalist vibe, it reminded me a bit of Mosolov's The Iron Foundry, but perhaps that's because I'm sure it had a very similar name, something about a factory or a mill or steel. I'm sure I stumbled across this piece by accident several times on YouTube wormholes but now I cannot find it at all, have tried multiple google search ideas. I don't remember knowing the other works of the composer. I think it's a fairly esoteric piece. I think mid-century American - but could be Russian. Any ideas?

[liszt-and-the-galops]

Perhaps Prokofiev's Sonata no. 7 mvt. 3?

It's frequently described as "industrial," is quite difficult, is undoubtedly loud, and is by a 20th Century Russian composer.

[bachfan]

Thanks, but no it's not that, it really is by quite a fringe composer. It's not from a piano sonata, it is standalone piece with a descriptive title. It does have a toccata kind of energy with the repeated notes but it is notably discordant and dissonant.

[liszt-and-the-galops]

Do Ives or Nancarrow ring a bell? Also, do you happen to know who the pianist was?

[bachfan]

It was not Ives, and I'm fairly sure it wasn't Nancarrow. I'm slightly worried I've made it up. It was very very discordant and harsh, literally machine-like, bashing semi-quavers on the piano. And definitely some sort of industrial feeling. And definitely a fringe composer, even more fringe than Nancarrow. I'm sure I didn't dream it.

[liszt-and-the-galops]

Only other 20th Century American piano composer who might be on "ImPoSsIbLe PiAnO pIeCe" videos Rzewski, though the only piece I'm aware of by him is Variations on "The People United." I've never listened to him.

ETA: John Cage, though I'm not aware of anything "industrial-sounding" by him. Admittedly I'm not very familiar with him, period.

ETA2: Just tried searching "piano" + "factory" + "*various 20th/21st Century American piano composers*" and when I got to Rzewski this came up. Seems to be a pretty good match:

If it's not that then I'm fully out of ideas. :/

[bachfan]

Thank you. This is the one!

[thorn]

Nice piece! Thanks for sharing