Very famously in the late 1960's Stanley Kauffman reviewing for the Times asked to be allowed to cover the final preview so he could put more thought into the review.
David Merrick didn't like this and refused to issue comps, so the NY Times bought Kauffmann a ticket. (I believe the play was PHILADELPHIA HERE I COME but I am not at home to check the Best Plays book...I may correct this line later.) Anyhow, Kauffman arrived at the theatre and there was a sign up saying that the performance had been cancelled and people could get refunds or exchanges at thw box office. Yes Merick refunded 1,000+ tickets JUST to keep one critic out of the theatre.
By the early 1970s Hal Prince began offering critics a choice of several late previews so the cast wasn't under such great pressure on the official opening night. (If you read Ted Chapin's FOLLIES book Clive Barnes attended a Wednesday matinee a few days before the show opened, but he was also invited to come on opening night if he wanted to see the show. By then of course the review was on file.)
With RAGTIME I expect the New York press will be in all this week and those of us coming from out-of-town (like me) will see it next week.
Cast albums are NOT "soundtracks."
Live theatre does not use a "soundtrack." If it did, it wouldn't be live theatre!
I host a weekly one-hour radio program featuring cast album selections as well as songs by cabaret, jazz and theatre artists. The program, FRONT ROW CENTRE is heard Sundays 9 to 10 am and also Saturdays from 8 to 9 am (eastern times) on www.proudfm.com