Bass strings are the thick strings found on a bass guitar or double bass, designed to produce deep, resonant sounds. Typically made from materials like nylon, steel, or a combination of both, these strings are tuned to lower pitches, which contribute to the instrument's rich tone. The standard tuning for a bass guitar is E1, A1, D2, and G2, while the double bass is usually tuned to E1, A1, D2, and G2 as well. The choice of string type and gauge can significantly affect the instrument's sound and playability, allowing musicians to achieve various tonal qualities.