Dave Harman wrote:

>It's Barber's "Agnus Dei" - on the CD "Evocation of the Spirit",
>Robert Shaw and Robert Shaw Festival Singers.  "Adagio for Strings" was
>origionally part of an early string quartet.  Toscanini convinced Barber
>to take the slow movemont of that quartet and make it a piece for String
>Orchestra.  Later Barber took the work and set the traditional "Agnus Dei"
>to it.

I think that the original poster specified rather clearly that it was NOT
the Agnus Dei that she sought, rather a wordless version for voices.  If
anyone else knows it, I would be interested too!

Kevin