brownie, I think we had a discussion of this already, maybe on the BNBB?
It's been two years or three years since I saw the film last time, but I think indeed there's but a few seconds of Mingus group music. The rest is some solo bass, and some very nice Hadi solo spots. Can't remember Newborn (but don't know him/his playing style at all, anyway). Hadi gets most of the music, but then, even that is but a few moments, the longest of those solo spots running maybe 20 or 30 seconds.
ubu