original passage: The surviving Shakers sing songs drawn from both the earlier repertoire and the four part songbooks. They perform all of these unaccompanied, in single-line unison singing. The many recent, harmonized arrangements of older Shaker songs for choirs and instrumental groups mark a departure from traditional Shaker practice.
original sentence: They perform all of these unaccompanied, in single-line unison singing.
sentence2: From the way a genuine Shaker musical rendition is performed in the passage, would you expect to see an orchestra pit or even a raised platform being used, so as to allow the singers to stand in an unobstructed line?
sentence1: The surviving Shakers sing songs drawn from both the earlier repertoire and the four part songbooks. They perform all of these unaccompanied, in single-line unison singing. The many recent, harmonized arrangements of older Shaker songs for choirs and instrumental groups mark a departure from traditional Shaker practice.