Interesting footage of Jack Hylton & Co. in the recording studio at 1:18 and at 3:00 in this Pathe short.
Unlike the stagey newsreel of Whiteman's "My Ohio Home," this one really looks like an actual, daily-grind recording session for a pre-swing big band. You get a sense of how they had to maneuver around and communicate for the session. Real pros. It's not hard to imagine Whiteman and Goldkette sessions looking something like this.