Editing Sousaphone (section)

===Pitch===
Most modern sousaphones are made in the key of <nowiki>BB</nowiki>{{flat}} (Low B Flat) and like tubas (which are commonly made in pitches of BB{{flat}}, CC, EE{{flat}}, and F) the instrument's part is written in "[[concert pitch]]", not transposed by key for a specific instrument. Although sousaphones may have a more restricted range than their concert tuba counterpart (most sousaphones have 3 valves instead of 4 to reduce weight), generally they can all play the same music and usually have parts written in the bass [[clef]] and the indicated octave is played (unlike [[double bass]] or [[Electric upright bass|electric bass]] that sound an octave lower than the indicated note). Many older sousaphones were pitched in the key of E{{flat}}, but current production of sousaphones in that key is limited.