Acoustic groups are musical ensembles that primarily use acoustic instruments, which produce sound naturally without electronic amplification. Common instruments in these groups include guitars, violins, pianos, and percussion instruments. The focus is often on the natural sound quality and the interaction between musicians, creating a more intimate atmosphere. These groups can vary in size and style, ranging from small folk bands to larger classical ensembles. Acoustic performances are popular in settings like coffeehouses, concerts, and festivals, where the audience can appreciate the nuances of the music without the interference of electronic effects.