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The first two phrases of the melody from Stephen Foster's "Oh! Susanna" are based on the major pentatonic scale [1]. A pentatonic scale is a musical scale with five notes per octave, in contrast to heptatonic scales, which have seven notes per octave (such as the major scale and minor scale).
In the Classical period, symphonies in G minor almost always used four horns, two in G and two in B ♭ alto. [2] Another convention of G minor symphonies observed in Mozart's No. 25 and Mozart's No. 40 was the choice of E-flat major , the subdominant of the relative major B ♭ , for the slow movement, with other examples including Joseph ...
Minor: Usual Aeolian mode or natural minor scale: Aeolian on C. Play ... Minor pentatonic scale on A. Play ...
When barring each fret in standard tuning, only and all of the notes of pentatonic scales are produced. For example, the open strings E, A, D, G, B, E yield the notes of the E minor pentatonic scale (G major pentatonic), and barring the third fret produces the notes of the G minor pentatonic scale (B♭ major pentatonic).
For instance, in C major, a jazz musician may alter the V chord, G 7 (G–B–D–F), with a flattened fifth, producing the chord G 7 ♭ 5 (G–B–D ♭ –F). An improviser might then choose a scale containing these four notes, such as the G whole tone scale, the G octatonic scale, or a mode of either D or A ♭ melodic minor ascending.
Since blue notes are alternate inflections, strictly speaking there can be no one blues scale, [8] but the scale most commonly called "the blues scale" comprises the minor pentatonic scale and an additional flat 5th scale degree: C E ♭ F G ♭ G B ♭ C. [9] [10] [11]
For example, in the open-G overtones tuning G–G–D–G–B–D, the (G,B) interval is a major third, and of course each successive pair of notes on the G- and B-strings is also a major third; similarly, the open-string minor-third (B,D) induces minor thirds among all the frets of the B-D strings.
The second is a pentatonic (so-called black-note) cluster, indicated by the flat sign; a sharp sign would be required if the notes showing the limit of the cluster were spelled as sharps. A chromatic cluster—black and white keys together—is shown in this method by a solid bar with no sign at all. [ 12 ]