[Gacivory]

Originally Posted by MavisGary610

Is this a recording of the actual show? If it is, I haven't come across it before. I have the recordings of the 2006/2011 revivals, but not this one. I hope they record the Katrina Lenk version and release that at some point down the line.

Its a documentary about the recording of the cast album. Musicals record cast albums separate from the performances.

From the Wikipedia article for the musical Company.

Original Cast Album: Company[edit]
The making of the original cast recording was captured by award-winning documentary filmmaker D. A. Pennebaker shortly after the show opened on Broadway[16] as a pilot for a TV series highlighting the different ways a cast-album recording session could be conducted. However, a week after the original screening, all the original producers for the proposed series were hired to go out to Hollywood and head up production at MGM. As nobody was left in New York to spearhead the project, the series was scrapped. Only this lone pilot film remains of an idea never brought to fruition.[17]

The 1970 film Original Cast Album: Company is filled with behind the scenes footage of the 14-hour recording process at the Columbia Records Big Church recording studio at East 30th Street and Third Avenue on the first Sunday in May, complete with much of the musical direction from and insight of Sondheim himself. Several of the show's numbers were captured in the film—including "Another Hundred People", "Getting Married Today", and "Being Alive"—all recorded with a live orchestra, done in multiple takes over the course of several hours.

Eventually only "The Ladies Who Lunch" remained to be recorded. It was well past midnight, and Stritch, Sondheim, and the orchestra were all clearly suffering from the effects of the day's marathon recording session. Stritch struggled repeatedly to record a satisfactory version of the song, even going so far as to slightly drop the key for a few takes. Her voice continued to degrade and her energy continued to ebb away. As she struggled, some conflict was seen between Stritch, the producer Thomas Z. Shepard, and Sondheim.

Before dawn, everyone agreed to stop. They recorded one last take of the orchestra by themselves and agreed to have Stritch come back early in the week and record the vocal over the previously recorded orchestra track.[18] The finale of the film features a revitalized Stritch, in full hair and makeup in preparation for a Wednesday matinee performance of the show, successfully performing "The Ladies Who Lunch" in one take.