Here are rehearsal recordings for you!
These are for Sphere and Ars Nova Singers’ use only; please do not distribute! 
Click on a link to listen here; right-click to download.

BERLIN MASS – FULL MOVEMENTS
Kyrie
Gloria
Alleluia 1
Alleluia 2
Veni Sancte Spiritus
Credo
Sanctus
Agnus Dei
The two most challenging movements, broken into smaller pieces:
GloriaOpening to b35 (1:20)
Middle Section: b36-60 (1:02)
Ending: b61-end (1:21)
CredoOpening to b51 (1:10)
Middle Section: b47-97 (1:20)
Ending: b115-end (1:24)


Thompson, Love Songs from Lonely Letters

FULL MOVEMENTS 
Mvt 1: One
Mvt 2: Found

SMALLER SEGMENTS – Chorus Parts Forward, with CLICK TRACKS
Mvt 1, b. 34-56 (1:35) – only a couple tricky notes; orchestra supports
S / A / T / B

Mvt 1, b. 73-end (0:45) – not too hard; orchestra supports from b. 77
S / A / T / B

Mvt 2, Opening to b. 42 (2:03)  – not too hard; this music repeats
S1 / S2 / A1 / A2 / T1 / T2 / Basses

Mvt 2, b. 34-40, slower (0:25)  – perhaps the hardest section
S1 / S2 / A1 / A2 / T1 / T2 / Basses

Mvt 2, b. 44-74 (1:37) – not too hard; orchestra supports; b. 67-74
S / A / T / B

Mvt 2, b. 99-end (1:18) – exposed a cappella section on p. 31
S / A / T / B