In music, the major fourth and minor fifth, also known as the paramajor fourth and paraminor fifth, are intervals from the quarter-tone scale, named by...

of as descending by a fifth to F, or ascending by a fourth to F. Each pitch can serve as the tonic of a major or minor key, and each of these keys will...

the fourth and fifth may be interchangeable or indeterminate. The perfect fifth is a basic element in the construction of major and minor triads, and their...

degrees of a major scale are called major. The major third may be derived from the harmonic series as the interval between the fourth and fifth harmonics...

sounds a fourth higher. (The basset horn also often sounds an octave and a fifth lower.) The scale degree chords of F major are: Tonic – F major Supertonic...

not both, and the different key signatures add flats or sharps according to the order shown in the circle of fifths. Each major and minor key has an...

interval. Its inversion is the diminished fourth, and its enharmonic equivalent is the minor sixth. The augmented fifth only began to make an appearance at...

occurrence is between the fifth and upper root of all major and minor triads and their extensions. An example of a perfect fourth is the beginning of the...

and seventh (and the compound intervals based on them) may be major or minor (or, rarely, diminished or augmented). Unisons, fourths, fifths, and octaves...

only thirds but also fourths and fifths, supplementing tertian major–minor harmony with quartal and quintal harmonies. Quartal and quintal harmonies are...