Surbahar

Surbahar (Urdu: سربہار‎; Hindi: सुर बहार), (literally: "Spring Melody" in Persian), sometimes known as bass sitar, is a plucked string instrument used in the Hindustani classical music of North India. It is closely related to sitar, but it has a lower tone. Depending on the instrument's size, it is usually pitched two to five whole steps below the standard sitar, but Indian classical music having no concept of absolute pitch, this may vary. The instrument can emit frequencies lower than 20 Hz.