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In jazz theory, an avoid note is a scale degree which is considered especially dissonant relative to the harmony implied by the root chord, and is thus better avoided. In major-key tonality the avoid note is the fourth diatonic scale step , or 11th, which is a minor ninth above the 3rd of the chord, and thus very harsh. [ 1 ]
All of these scales were commonly used by late nineteenth and early twentieth-century composers such as Rimsky-Korsakov, Debussy, Ravel and Stravinsky, often in ways that directly anticipate jazz practice. [2] Some jazz scales, such as the eight-note bebop scales, add additional chromatic passing tones to the familiar seven-note diatonic scales.
The term side-slipping or side-stepping has been used to describe several similar yet distinct methods of playing outside. In one version, one plays only the five "'wrong'" non-scale notes for the given chord and none of the seven scale or three to four chord tones, given that there are twelve notes in the equal tempered scale and heptatonic scales are generally used. [3]
List of musical scales and modes Name Image Sound Degrees Intervals Integer notation # of pitch classes Lower tetrachord Upper tetrachord Use of key signature usual or unusual ; 15 equal temperament
In jazz, the altered scale, altered dominant scale, or super-Locrian scale (Locrian ♭ 4 scale) is a seven-note scale that is a dominant scale where all non-essential tones have been altered. This means that it comprises the three irreducibly essential tones that define a dominant seventh chord , which are root, major third, and minor seventh ...
The bebop major scale is derived from the Ionian mode (major scale) and has a chromatic passing note added (a ♯ 5) between the 5th and 6th degrees of the major scale. Adding the ♯ 5 note to the seven-note major scale allows the chord tones 1, 3, 5 and 6 (a major 6th chord) to land on on-beats when the scale is played sequentially.
The lower note is a constant A (440 Hz in either scale), the upper note is a C ♯ in the equal-tempered scale for the first 1", and a C ♯ in the just intonation scale for the last 1". Phase differences make it easier to detect the transition than in the previous sample.
The chord-scale system may be compared with other common methods of improvisation, first, the older traditional chord tone/chord arpeggio method, and where one scale on one root note is used throughout all chords in a progression (for example the blues scale on A for all chords of the blues progression: A 7 E 7 D 7).