The term is also sometimes used in telephony to describe the special information tones, a sequence of three tones played to indicate a technical announcement. This is unrelated to the musical usage.
Also see triton in case none of these meanings seems to fit. The augmented fourth between C and F# forms a tritone. ... In music theory, an interval is the distance in pitch between two notes, the lower and higher members of the interval. ... A telephone handset A touch-tone telephone dial Telephone The telephone or phone (Greek: tele = far away and phone = voice) is a telecommunications device that transmits speech by means of electric signals. ... A record label is a brand created by companies that specialize in manufacturing, distributing and promoting audio and video recordings, on various formats including compact discs, LPs, DVD-Audio, SACDs, and cassettes. ... Triton may refer to: Triton, a Greek god; his name and image have come to be associated with a class of mythological beings called Tritons. ...
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The tritone is a restless interval, classed as a dissonance in common practice music; less dissonant than the second or seventh, but given the name diabolus in musica ("the Devil's interval") by some from the early music era to the baroque period.
The tritone occurs naturally between the 4th and 7th scale degrees of the major scale (for example, in C major F to B), and depending on which of the two notes occurs in the bass, it is either an augmented 4th, or a diminished 5th.
In jazz harmony, the tritone is both part of the dominant chord and its substitute dominant (also known as the sub V chord).