The frequency range of bass varies depending on the source, but generally, bass frequencies are considered to be in the range of 60 to 250 Hz. However, the sub-bass range, which is the lowest audible frequency range and home to the deepest instruments in the mix, is typically reserved for bass guitars, synths, and the occasional kick drum sample, and it extends from 20 to 60 Hz. The fundamental range of a 4-string bass guitar goes from about 40 Hz to 400 Hz, with the low open E being 41 Hz and the common high D# being 311 Hz. The lowest note on a standard piano is A at 27.5 Hz, and the lowest note on a pipe organ is typically tuned to 32 Hz (C1) .