When the AI songs started happening, I've been hoping someone would make a very long version of 1/1 from Music for Airports. This is not that. I don't mean stretched out. I just mean that it gets interpolated outwards after the original composition ends.

Does anyone know what can make that?

I linked this page in another comment:

Deconstructing Brian Eno's Ambient 1: Music for Airports https://reverbmachine.com/blog/deconstructing-brian-eno-musi...

It's not exactly for 1/1, but scroll down to "Deconstructing 2/1" or "Deconstructing 1/2", then down to the music staves section - Hit "Start All", then roll the dice, and it will randomize the loop times! With a little javascript hacking I'm sure you can add more control over the loops and such.

He has some samples for 1/1 tracks too, those could be looped or fed to some AI music software I'm sure to come up with some interpolated result too.

The Black Dog have a lovely Patreon where they personally answer comments. Have you considered asking them?

Try https://play.generative.fm/browse. The endless aisatsana generator is pretty good, I'm sure there's an option that's similar to 1/1.

I would say only Brian Eno can make one.

Maybe he made some other music thats continuation.