The bass guitar supplies the low-pitched foundation in most popular and jazz ensembles. Its four strings are normally tuned E-A-D-G, an octave below the lowest four strings of a standard guitar. Players pluck or pick the strings while fretting notes on a long neck.

Electric bass guitars dominate modern music because they project clearly through amplifiers. Acoustic and semi-acoustic models exist for quieter settings. The instrument locks with the drums to form the rhythm section, defining both harmony and groove. Melodic bass lines can also step forward as featured parts.

Techniques range from simple root-note patterns to slap, pop, and complex walking lines. Famous bassists have expanded the instrument’s role far beyond pure accompaniment. In a mix the bass occupies a frequency range that other instruments rarely fill, giving the music weight and momentum.

Setup and string choice strongly affect tone and playability.