trombones. This chart uses standard numberings for octaves where middle C corresponds to C4. In the MIDI language middle C is referred to as MIDI note number 60. The lowest note that a pipe organ can sound (with a true pipe) is C−1 (or CCCC), which is 8 Hz, below the range of human hearing and not visible on this chart. However, if acoustic combination (a note and its fifth) counts, the lowest note is C−2 (or CCCCC), which is 4 Hz. In terms of recording and reproduction, many speakers have a low limit of around 40–60 Hz. Typical ranges See also Tessitura Extension (music) Sub-bass Hearing range Notes External links Music performance Pitch (music)