This relatively new singers series from Decca is interesting. They have opened up their vaults and released recordings of legendary singers going outside their standard repetoire. In some cases, it works quite well(hear Corelli or Di Stefano singing from OTELLO on their discs). In the case of this collection of the great Renata Tebaldi, they don't quite succeed.
Yes, it's great to hear her in the LA WALLY aria, or the MANON LESCAUT aria- particularly the latter becuase it was recorded very early on in her career. But we've heard all this before on other, better compilations.
There is too much late career Tebaldi here that plagues this collection. Here voice sounds tired and lackluster in the breif ADRIANA LECOUVREUR duet with Corelli, especially when compared to the recording of it she did Del Monaco ten years earlier. The AIDA duet, also with Corelli, in which she sings the mezzo role of Amneris is mediocre, at best. THough she sounds comfortable down in the depths of the mezzo notes, she is never truly convincing. Corelli doesn't fare much better here, either.
Gounod's "O Divine Redeemer" is a standout here, but an odd version of Rodgers & Hammersteins "If I Loved You" is best avoided.
All in all, there are some moments of Tebaldi's greatness here, but they are few and far between. To hear her at her best, pick up the Opera D'Oro live TOSCA from '59 with Di Stefano and Gobbi, or the '67 GIOCONDA with Bergonzi (if you can find it), or one of the many other Decca compilations that find a youthful Tebaldi sounding comfortable in her standard repetoire.