Can someone explain the separation in this performance?

[Ben Asaro]

https://www.youtube.com/watch?v=OemianoWSiU

Mind blowing performance, but ... how did they achieve such a wide sound stage without bleed??

[forumuser931182]

A mic for every musician panned appropriately?

[Bob Bickerton]

If you were to isolate each mic, you would no doubt would hear bleed from the other instruments, but it would be relatively low compared to the source instrument and with what looks like excellent mics (Schoeps or Sennheiser) the bleed would be high quality.

Nothing much unusual about that………

Bob