I'm not trained in categorization though, and don't often think about it! The subject reminds me of bins in records stores, and maybe that's all it comes down to. "Hmm which of these large bins does
Köln Concert best fit into". Reminiscent of finding pi to 1 decimal place, not very useful. And Keith's solo improvisations seem particularly unique.
Köln Concert does seem a very different kind of thing to Facing You though, although the latter is mostly totally improvised also, I believe. I guess due to F You's much shorter tune lengths and absence of extended improvisations over 1 or 2 chords etc. Facing You will play for 10 seconds with what Köln spends 5 minutes with..
> it's an important characteristic of the genre is not strongly shared by other genres.
What is not strongly shared, improvisation, or being entirely improvised?[0]
I also listen to a lot of North Indian classical..which seems about the same percentage entirely improvised as the Köln Concert.
I'm no an expert, but I don't think totally improvised western music is at all common outside "free jazz". i.e. it usually sounds like atonal noise, not pleasingly harmonious. That is very difficult. Classical musicians used to do it, until the 19th C, apparently, but gave up.
> There is something more to being a genre than the notes that are played
Absolutely, I've made this point many times myself, and it's something that was driven home to me when I started writing music with computers. Use jazz instrumentation and the music sounds like jazz. Rock instrumentation and it sounds like rock. Orchestra and it sounds like classical etc.
[0] Just to be clear, the last track isn't "entirely improvised", it's an improvisation over the Jarrett tune Memories of Tomorrow, which he'd been playing since at least 1966. And
> Subtle laughter may be heard from the audience at the very beginning of "Part I", in response to Jarrett's quoting of the melody of the signal bell which announces the beginning of an opera or concert to patrons at the Köln Opera House, the notes of which are G D C G A.
https://en.wikipedia.org/wiki/The_K%C3%B6ln_Concert