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96-button Stradella bass layout on an accordion. C is in the middle of the root note row. The Stradella Bass System (sometimes called [1] standard bass) is a buttonboard layout equipped on the bass side of many accordions, which uses columns of buttons arranged in a circle of fifths; this places the principal major chords of a key (I, IV and V) in three adjacent columns.
Enigmatic scale on C [1] (Play ⓘ) Descending enigmatic scale on C [2] [3] is distinguished by F ♮, a lowered fourth degree.(Play ⓘ)The enigmatic scale (Italian: scala enigmatica) is an unusual musical scale, with elements of both major and minor scales, as well as the whole-tone scale.
Scriabin himself called this set of pitches, voiced as the simultaneity (in ascending order) C F ♯ B ♭ E A D the "mystic chord". Others have referred to it as the "Promethean chord". It may be thought of as C Lydian-Mixolydian. It can also be though as a triad pair: a minor triad and an augmented triad 1/2 step up.
Minor chords are noted with a dash after the number or a lowercase m; in the key of D, 1 is D major, and 4- or 4m would be G minor. Often in the NNS, songs in minor keys will be written in the 6- of the relative major key. So if the song was in G minor, the key would be listed as B ♭ major, and G minor chords would appear as 6-.
Major/minor compositions are musical compositions that begin in a major key and end in a minor key (generally the parallel minor), specifying the keynote (as C major/minor). This is a very unusual form in tonal music, [ 1 ] [ 2 ] although examples became more common in the nineteenth century. [ 3 ]
In the key of C major, these would be: D minor, E minor, F major, G major, A minor, and C minor. Despite being three sharps or flats away from the original key in the circle of fifths, parallel keys are also considered as closely related keys as the tonal center is the same, and this makes this key have an affinity with the original key.
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.
For instance, if a piano piece had a C major triad in the right hand (C–E–G), with the bass note a G with the left hand, this would be a second inversion C major chord, which would be written G 6 4. If this same C major triad had an E in the bass, it would be a first inversion chord, which would be written E 6