The vimeo page that you linked to includes the name of the musician in the
text - jazz multi-instrumentalist Joe McPhee.
McPhee is fantastic.
From: Kate Ewald <katherine.ew...@gmail.com>
Ephraim Asili's Many Thousands Gone uses an improvised score from a jazz
saxophonist, although I don't know his name. My understanding was that they
did two takes - the first completely improvised without seeing the film
prior, and the second take with only the first viewing under his belt.
Ephraim then edited the two takes together for what is now the full score,
with permission from the musician.
You can see the full film on his vimeo: https://vimeo.com/105169029
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