The year I was born was the year of the Broadway premieres of GYPSY, THE SOUND OF MUSIC, FIORELLO, REDHEAD, JUNO and TAKE ME ALONG.
The original Broadway production of DREAMGIRLS opened on my birthday in 1981.
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