This is The 1959 recording of The Student Prince by Mario Lanza.
It is very different from the soundtrack recording of the film recorded
in 1953. The youthful fresh voice of the early 50s has by now given way
to a more powerful and dramatic tenor voice. This voice has lost much of
its young romantic lyrical flavour, but in its place there is a drama and intensity that only a large operatic voice can provide. There are still touching moments in the "Summertime in Heidelberg" but the "I'll Walk With God" and "Serenade" are sung with endless conviction.
Now in the correct pitch and remastered, the Lanza voice has returned.
The LP released in 1959 was in very poor sound and a semitone down in pitch. This I believe is the first time many will have heard Lanza singing these songs as they were actually sung in the studio. Have a listen and compare them to the LP if you have it.................it is quite a revelation. See link below: