I’m wondering how best to represent work level credits for work that’s fully improvised or partially improvised.
For example, Made to Break, a jazz group, has compositions by Ken Vandermark, but the entire group is also credited as ‘music improvised by’. My guess is that these compositions are fairly loose, potentially grooves, or various ideas that can be interpreted on the spot to create the piece.
This is slightly different than pieces that are entirely improvised. see, for example, pieces featured on this release: https://musicbrainz.org/release/a8ce6de3-0ae8-4229-8e02-1aa45df8c4c0 In this case the pieces are fully improvised, so I gave each member of the group a composer credit, as it seems like they were composing on the spot. But this seems a strange solution.
In the case of Made to Break (which I’m in the process of cataloging), some of Vandermark’s compositions are played on other live releases, so it would make sense to link them. One solution would be to create a new work that represents Vandermark’s score, and have the various improvisations of it as spontaneous arrangements, but, again that relationship seems misapplied.