As far as I know all of the original Sweeney Todd cast recording was done at RCA's Studio A at 110 W. 44th Street in NYC (it is no longer a recording studio). Sound effects were added to the recording "radio drama" style to give listeners a sense of what was happening, example footsteps as Judge Turpin runs out of Todd's establishment. I'm not sure if the sound effects were done as the actors recorded or if they were added later. As for Worst Pies in London it has always sounded to me like Lansbury added the grunts and moans to her own take. It doesn't sound like she sang and grunted within the same take maybe to make sure the lyrics came through cleanly. (The tempo is also much faster than it was performed in the theatre I think.) Photos of the recording session
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
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