An octet.
A group of eight singers or players is called an "octet." This term is commonly used in music to refer to an ensemble consisting of eight members, whether vocalists or instrumentalists. The word "octet" is derived from the prefix "oct-" meaning eight.
Duet
A group of vocalists is a choir.
Quintetto is an Italian equivalent of the English word "quintet." The masculine singular noun references a group of five entertainers, instrumentalists, musicians, performers, or vocalists. The pronunciation will be "kween-TET-to" in Italian.
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A chamber group typically consists of a small ensemble of musicians, often ranging from two to around ten instrumentalists. Common configurations include duos, trios, quartets, and quintets, with string quartets (two violins, a viola, and a cello) being particularly popular. The exact number of instrumentalists can vary depending on the specific piece of music being performed and the ensemble's composition. Overall, you would generally expect to find between two to eight instrumentalists in a chamber group.
A group of six singers or six instrumentalists.
mariachi's
mariachi's
Grace notes, note bending, slurring, octave jumping, bar line blurring, utilising chord progressions.
A group of four people singing music together is commonly referred to as a quartet. This term is often used in various musical genres, including classical, jazz, and pop. Quartets can consist of any combination of vocalists or instrumentalists, but in vocal contexts, they typically feature four singers harmonizing together.
There is no standard collective nouns for 'instrumentalists', however, the collective noun for musicians will work:a band of instrumentalistsan orchestra of instrumentalists