A fourth is a musical interval encompassing four staff positions in the music notation of Western culture, and a perfect fourth (Play) is the fourth spanning...

Greek names, diapente. Its inversion is the perfect fourth. The octave of the fifth is the twelfth. A perfect fifth is at the start of "Twinkle, Twinkle...

such as 1:1 (unison), 2:1 (octave), 5:3 (major sixth), 3:2 (perfect fifth), 4:3 (perfect fourth), 5:4 (major third), 6:5 (minor third). Intervals with small-integer...

a perfect fourth or a major second. The lack of a minor or a major third in the chord creates an open sound, while the dissonance between the fourth and...

Chords can progress in a pattern of ascending perfect fourths (alternately viewed as descending perfect fifths) in "functional succession". This can be...

the perfect fourth, the augmented fourth and the diminished fourth. For instance, a three-note quartal chord on C can be built by stacking perfect fourths...

three, or vice versa. For instance, the perfect fifth with ratio 3/2 (equivalent to 31/ 21) and the perfect fourth with ratio 4/3 (equivalent to 22/ 31)...

class. To emphasize that it is one of the perfect intervals (including unison, perfect fourth, and perfect fifth), the octave is designated P8. Other...

perfect fourth (five semitones). The perfect-fifth and perfect-fourth intervals are inversions of one another, and the chords of all-fourth and all-fifths...

Christian hymns featured organum (which used the simultaneous perfect intervals of a fourth, a fifth, and an octave), with chord progressions and harmony...

— Roger Kamien Consonances may include: Perfect consonances: unisons and octaves perfect fourths and perfect fifths Imperfect consonances: major thirds...

being tuned in 5ths, and creating as by a five-semitone interval (a perfect fourth) allows the guitarist to play a chromatic scale with each of the four...

of the most consonant intervals after the unison, octave, perfect fifth, and perfect fourth. In the common practice period, thirds were considered interesting...

standard tuning, the intervals present among adjacent strings are perfect fourths except for the major third (G,B). Standard tuning requires four chord-shapes...

having perfect fourths between the other successive strings. The standard tuning's irregular major-third is replaced by a perfect fourth in all-fourths tuning...

Specific fourth intervals include: Perfect fourth, the fourth spanning five semitones Diminished fourth, a perfect fourth narrowed by a chromatic semitone, thus...

ascending fourth or descending fifth relationship", with movement by ascending perfect fourth being equivalent to movement by descending perfect fifth due...

augmented fourth (A4) and diminished fifth (d5) are defined as the intervals produced by widening the perfect fourth and narrowing the perfect fifth by...

tone/reciting note or tenor) into a fourth species of perfect fifth (tone–tone–semitone–tone) plus a third species of perfect fourth (tone–tone–semitone): C D E...

traditional music theory, a tetrachord always spanned the interval of a perfect fourth, a 4:3 frequency proportion (approx. 498 cents)—but in modern use it...

term perfect is interpreted to mean 'perfectly consonant', the impure perfect fourth and perfect fifth are sometimes simply called the imperfect fourth and...

strings are usually tuned to the same note and the third string is a perfect fourth higher. The higher-pitched balalaikas are used to play melodies and...

of the most consonant intervals after the unison, octave, perfect fifth, and perfect fourth. The sopranino saxophone and E♭ clarinet sound in the concert...

interject the head: from the bottom up, three notes at intervals of a perfect fourth followed by a major third, has been given the name "So What chord" (shown...

not easily understood, as the irrational [sic] remainder between the perfect fourth and the ditone ( 4 3 / ( 9 8 ) 2 = 256 243 ) {\displaystyle...

third and two quarter tones or dieses). The framing interval of the perfect fourth is fixed, while the two internal pitches are movable. Within the basic...

along with the unison, octave, perfect fifth, major and minor thirds, minor sixth, and (sometimes) the perfect fourth. In the common practice period,...

(perfect fourth): All-fourths tuning, 6 semitones (augmented fourth, tritone, or diminished fifth): Augmented-fourths tuning, 7 semitones (perfect fifth):...

corresponding fourth psalm tone) had an important melodic function. The melodic range of the ecclesiastical Hypophrygian mode therefore goes from the perfect fourth...

instruments with a fourth valve, such as tubas, euphoniums, piccolo trumpets, etc. that valve lowers the pitch by a perfect fourth; this is used to compensate...