Diapason may refer to:
*
Diapason (interval)
In music, an octave (: eighth) or perfect octave (sometimes called the diapason) is an interval between two notes, one having twice the frequency of vibration of the other. The octave relationship is a natural phenomenon that has been referre ...
, the name of the just octave in Pythagorean tuning
*
Diapason (pipe organ)
A flue pipe (also referred to as a ''labial'' pipe) is an organ pipe that produces sound through the vibration of air molecules, in the same manner as a recorder or a whistle, in a pipe organ. Air under pressure (called ''wind'') is driven ...
, a tonal grouping of the flue pipes of a pipe organ
*
''Diapason'' (magazine), a French classical music magazine
*
''The Diapason'' (magazine), an American magazine for organ builders and players
* ''Diapason normal'', the official French standard of
concert pitch
Concert pitch is the pitch reference to which a group of musical instruments are tuned for a performance. Concert pitch may vary from ensemble to ensemble, and has varied widely over time. The ISO defines international standard pitch as A440, ...
* ''Diapason'', a 1978 novel by
Thomas Sullivan
See also
*
Tuning fork
A tuning fork is an acoustic resonator in the form of a two-pronged fork with the prongs ( ''tines'') formed from a U-shaped bar of elastic metal (usually steel). It resonates at a specific constant pitch when set vibrating by striking it ag ...
(''diapason'' in Italian and French)
{{disambiguation