The Canadian premiere of ALLEGRO happened just 5 years ago (Feb 2004) and I too eagerly anticipate a ccomplete recording.
The original cast recording was done when the record industry was still using 78-rpm discs which could hold about 4 minutes per side. RCA VICTOR recorded 5 records of ALLEGRO highlights -and they sound like bleeding chunks. (Imagine SWEENEY TODD being recorded that way!)
Because ALLEGRO was not a success in 1947, there were no major revivals, no film, and no TV version. So for the past 60+ years all we had was this OCR - and we barely had that. It was out as a set of 78's but in 1950 when RCA started releasing LP's, they did not reissue the ALLGRO album. It did NOT appear on LP until 1965 (in mono adn fake stereo.) That album was around a few years then deleted. RCA Red Seal re-released it in 1977 (finally using the show's poster art on the cover) but again it did not last but a few years in print.
The CD edition was timed to the celebration of the 50th anniversary of Rodgers and Hammerstein in 1993, and surprisingly it is still in print.
ALLEGRO - OCR
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