acappella
adv. B2 Upper Intermediate acap·pel·la
adv. singing without any musical instruments. You use this when a group of people performs only with their voices.
adv. performed or sung without instrumental accompaniment. Often used as a modifier before the noun it describes.
The choir performed an acappella version of the song.
The band decided to play an acappella set to show off their vocal harmony skills.
While the original recording featured a full orchestra, the acappella version highlights the intricate vocal layering and the lead singer's ability to mimic various instruments.