Measures 20-32 and 36-48 are voiced different. Scroll down for measures 36-48.
Measures 20-32
Soprano/Alto 3-part split without top sopranos
All
Soprano/Alto middle emphasized (follow top Tenor line)
Alto bottom emphasized (follow bottom Tenor line)
Tenor emphasized (follow top Bass line)
Bass emphasized (follow bottom Bass line)
Measures 36-48
As written
All
Soprano emphasized
Alto emphasized
Tenor emphasized
Bass emphasized
Matthew Alan Edwards 