What is the register of a double bass?

The register of a double bass typically ranges from E1 (the lowest note) to about C5 (the highest note), covering roughly four octaves. Its fundamental tones are in the lower bass range, making it one of the lowest-pitched instruments in the string family. The double bass is often used to provide harmonic and rhythmic foundation in orchestras, ensembles, and various Music Genres. Its deep, resonant sound contrasts with the higher registers of other string instruments.