Mathieu Amalric filmed John Zorn and his musicians over a period of 12 years. The result is these three documentaries in which we see John Zorn in rehearsal, performance and concerts. An extremely prolific composer who gravitates towards various styles related to jazz and contemporary music, to put it simply.
It's always fascinating to see enthusiasts and experts at work. John Zorn is more than passionate, a genius or an eccentric who's constantly creating music, but above all he comes across as a child who's always having fun. Whether in rehearsal, the most interesting parts where we see him reacting to interpretations or making comments (he doesn't conduct directly, but comments in order to go where he wants), or in concert where he watches or participates himself, or whether solo on the organ, which is an instrument he's passionate about.
What's missing are the moments when John Zorn explains how he creates, what his internal algorithms are, there are a few where we see him on his tablet, but these moments are a little lacking to complete, to have a confirmation of the genius or maybe it's a laborious person who spends all his time on it.