My name is John Hodgson, and I sing tenor with the Jubilate Singers in Toronto, Canada. I created these mp3s with a virtual choir singing your lyrics. Here is a demo of me creating an mp3 file – https://youtu.be/xtxUNrbkQZE
In some cases I added the singers to midi files such as those created by the talented owner of John’s Midi File Choral Music Site.
The Messiah practice files are derived from those created by the owner of Saved Sounds.