Yes: Producer Brian Kehew talks more about the new 14CD Progeny live set.

Yes have posted the following:

Listen to ‪#‎PROGENY‬ with producer Brian Kehew: Part 8 of 9
I've Seen All Good People (Knoxville)
"Mixing enabled us to give a realistic “front-row seat” perspective. Steve Howe is far to the left, Alan White is center, Rick Wakeman is far to the right, and Chris Squire is between the drums and keyboard. With this in mind, you’ll no doubt hear the difference as the players are positioned distinctly apart, allowing you to hear each more clearly. When each musician solos, it comes from their natural side of the stage, as opposed to the centered positions given on Yessongs. Eddie Offord had added some phasing sounds to the drum fills during the live shows, but this was not recorded to tape. Here, the drums are heard as recorded, to present a more natural representation of Alan’s playing.
Fans will appreciate how this package represents the evenings as they really happened, and shows an objective view of the group’s many strengths. Modern technology makes it possible to fix buzzes and hums. However, this box set avoids many modern concepts of “fixing,” allowing the true shows to be heard."
— PROGENY producer, Brian Kehew