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  2. Royal road progression - Wikipedia

    en.wikipedia.org/wiki/Royal_road_progression

    IV M7 –V 7 –iii 7 –vi chord progression in C. Play ⓘ One potential way to resolve the chord progression using the tonic chord: ii–V 7 –I. Play ⓘ. The Royal Road progression (王道進行, ōdō shinkō), also known as the IV M7 –V 7 –iii 7 –vi progression or koakuma chord progression (小悪魔コード進行, koakuma kōdo shinkō), [1] is a common chord progression within ...

  3. Scale of chords - Wikipedia

    en.wikipedia.org/wiki/Scale_of_Chords

    A chord is a line drawn between two points on the circumference of a circle. Look at the centre point of this line. For a circle of radius r, each half will be ⁡ so the chord will be ⁡. The line of chords scale represents each of these values linearly on a scale running from 0 to 60.

  4. Intersecting chords theorem - Wikipedia

    en.wikipedia.org/wiki/Intersecting_chords_theorem

    In Euclidean geometry, the intersecting chords theorem, or just the chord theorem, is a statement that describes a relation of the four line segments created by two intersecting chords within a circle. It states that the products of the lengths of the line segments on each chord are equal.

  5. Roman numeral analysis - Wikipedia

    en.wikipedia.org/wiki/Roman_numeral_analysis

    These chords are all borrowed from the key of E minor. Similarly, in minor keys, chords from the parallel major may also be "borrowed". For example, in E minor, the diatonic chord built on the fourth scale degree is IVm, or A minor. However, in practice, many songs in E minor will use IV (A major), which is borrowed from the key of E major.

  6. Close and open harmony - Wikipedia

    en.wikipedia.org/wiki/Close_and_open_harmony

    In contrast, a chord is in open harmony (also called open position or open structure [1]) if there is more than an octave between the top and bottom notes. The more general term spacing describes how far apart the notes in a chord are voiced. A triad in close harmony has compact spacing, while one in open harmony has wider spacing.

  7. Half-diminished seventh chord - Wikipedia

    en.wikipedia.org/wiki/Half-diminished_seventh_chord

    In diatonic harmony, the half-diminished seventh chord occurs naturally on the seventh scale degree of any major scale (for example, B ø 7 in C major) and is thus a leading-tone seventh chord in the major mode. [3] Similarly, the chord also occurs on the second degree of any natural minor scale (e.g., D ø 7 in C minor). It has been described ...

  8. Circular segment - Wikipedia

    en.wikipedia.org/wiki/Circular_segment

    A circular segment (in green) is enclosed between a secant/chord (the dashed line) and the arc whose endpoints equal the chord's (the arc shown above the green area). In geometry , a circular segment or disk segment (symbol: ⌓ ) is a region of a disk [ 1 ] which is "cut off" from the rest of the disk by a straight line.

  9. Minor chord - Wikipedia

    en.wikipedia.org/wiki/Minor_chord

    A unique particularity of the minor chord is that this is the only chord of three notes in which the three notes have one harmonic – hearable and with a not too high row – in common (more or less exactly, depending on the tuning system used). This harmonic, common to the three notes, is situated 2 octaves above the high note of the chord.