vocals
n. C / Un. the part of a piece of music that is sung by a person rather than played on instruments. You use this word to talk about the singing voice in a song.
n. the singing component of a musical recording or performance, as distinguished from instrumental accompaniment. Usually plural in form when referring to the vocal track or performance as a whole.
The vocals on this track are very clear.
The producer decided to lower the volume of the drums to make the lead vocals stand out more.
While the instrumental arrangement is technically proficient, it is the raw, emotive power of the lead vocals that truly resonates with the listener and defines the album's success.
Usually plural ('the vocals'); the singular form 'vocal' is often used as an adjective or to refer to a specific vocal line.