Yes: Progeny 14CD live set producer Brian Kehew talks about the recordings.

Yes have posted the following:

Listen to ‪#‎PROGENY‬ with producer Brian Kehew: Part 7 of 9
Roundabout (Durham)
"This was Alan White’s first tour with the band. He also plays some early electronic drum bits, audible as percussion during the Roundabout breakdown section. Alan’s command of the newly learned music is spectacular; at times he drives the music as forcefully as we’ve ever heard."
— PROGENY producer, Brian Kehew

Get PROGENY at Amazon:

Read more at…/…/yes-progeny-live-from-seventy-two/