Rehearsal Music
Music files that can be played on the computer for rehearsing are available. They can be played directly or downloaded
Handel's Messiah rehearsal music can be found at
Midi http://www.learnchoralmusic.co.uk/Handel/Messiah/messiah.html
Cyberbass http://www.cyberbass.com/Major_Works/Handel_GF/Handel_Messiah.htm
Spotify https://open.spotify.com/album/4e5MOtI4r6XKYsvh5yFSrB