Popular music is usually accompanied by electroacoustic bands. The four commonly used instruments in electroacoustic bands are guitar (mostly electric guitar), bass (electric bass), and drum (drum set, also called jazz). drums) and keyboard (electronic keyboard or synthesizer).

To use a vivid metaphor, if an electroacoustic band is compared to a person, then the drum is the skeleton, the bass is the flesh, the guitar is the blood, and the keyboard is the skin.