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Here, the bass note is a C, and the numbers 4 and 6 indicate that notes a fourth and a sixth above it should be played, that is an F and an A. In other words, the second inversion of an F major chord can be realized as:
There may be any number of beats in a measure but the most common by far are multiples of 2 or 3 (i.e., a top number of 2, 3, 4, or 6). Likewise, any note length can be used to represent a beat, but a quarter note (indicated by a bottom number of 4) or eighth note (bottom number of 8) are by far the most common.
Nashville notation or Nashville Number System [2] is a method of notating chord changes using numbers based on scale degrees, in lieu of chord names. For example, in the key of C-Major , the chord D - minor-seventh can be written as 2− 7 , 2m 7 , or ii 7 .
An inverted chord is a chord with a bass note that is a chord tone but not the root of the chord. Inverted chords are noted as slash chords with the note after the slash being the bass note. For instance, the notation C/E bass indicates a C major triad in first inversion i.e. a C major triad with an E in the bass.
Some sources notate slash chords with a horizontal line, [3] although this is discouraged as this type of notation can also imply a polychord.While almost all pop and rock usages of slash chords are intended to be read as a chord with a bass note underneath it other than the root of the chord, in jazz and jazz fusion, sometimes a chord notated as F/A is intended to be read as a polychord; in ...
In the key of C, C/E (C major first inversion, with E bass) is written as 1/3; G/B is written as 5/7; Am/G (an inversion of Am7) is written as 6m/5; F/G (F major with G bass) is 4/5. Just as with simple chords, the numbers refer to scale degrees; specifically, the scale degree number used for the bass note is that of the note's position in the ...
The algorithm used minimized the total sum of local cost L(p) and transition cost T(p,q), where p is the realisation of the actual bass note, and q the realisation of the next one. Local cost L(p) is a.o. expressed by the probability of an inversion of the chord for bass note p and the width of the chord (is it playable?).
A part so annotated consists of a bass line in notes on a musical staff plus numbers and accidentals (or in some cases (back)slashes added to a number) beneath the staff to indicate what intervals above the bass notes should be played, and therefore which inversions of which chords are to be played.