altdegree

Altdegree is a term used in the field of music to describe a musical interval that is not a standard diatonic interval. The term "alt" is short for "altered," and "degree" refers to the step in a musical scale. Altdegrees are often used in jazz, rock, and other forms of modern music to create unique and expressive harmonies.

The most common altdegrees are the flat 5 (b5) and the sharp 11 (#11). The flat 5 is a diminished fifth, which is a half step below the perfect fifth. The sharp 11 is a major seventh, which is a whole step above the minor seventh. These intervals can be used to create tension and release in a chord, as well as to add color and interest to a melody.

Altdegrees can also be used to create extended chords, which are chords that include more than three notes. For example, a dominant seventh chord (5-3-7) can be extended to include a flat 9 (b9) or a sharp 11 (#11), creating a chord with five or more notes.

Altdegrees are an important tool for musicians who want to create unique and expressive music. By understanding and using altdegrees, musicians can add depth and interest to their compositions, as well as to their improvisations.