7L 3s: Difference between revisions
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Names for this scale's [[degrees]], the positions of the scale's tones, are called '''mosdegrees'''. Its [[Interval|intervals]], the pitch difference between any two tones, are based on the number of large and small steps between the two tones and are thus called '''mossteps'''. Per TAMNAMS, both mosdegrees and mossteps are ''0-indexed'', and may be referred to as '''dicodegrees''' and '''dicosteps'''. Ordinal names, such as mos-1st instead of 0-mosstep, are discouraged for non-diatonic MOS scales. | Names for this scale's [[degrees]], the positions of the scale's tones, are called '''mosdegrees'''. Its [[Interval|intervals]], the pitch difference between any two tones, are based on the number of large and small steps between the two tones and are thus called '''mossteps'''. Per TAMNAMS, both mosdegrees and mossteps are ''0-indexed'', and may be referred to as '''dicodegrees''' and '''dicosteps'''. Ordinal names, such as mos-1st instead of 0-mosstep, are discouraged for non-diatonic MOS scales. | ||
{{MOS intervals|Scale Signature=7L 3s}} | {{MOS intervals|Scale Signature=7L 3s}} | ||
==Theory== | |||
=== Presence of neutral intervals === | |||
7L 3s combines the familiar sound of perfect fifths and fourths with the unfamiliar sounds of neutral intervals, thus making it compatible with Arabic and Turkish scales, but not with traditional Western scales. Notable intervals include: | |||
*The '''perfect 3-mosstep''', the scale's dark generator, whose range is around that of a neutral third. | *The '''perfect 3-mosstep''', the scale's dark generator, whose range is around that of a neutral third. | ||
*The '''perfect 7-mosstep''', the scale's bright generator, the inversion of the perfect 3-mosstep, whose range is around that of a neutral sixth. | *The '''perfect 7-mosstep''', the scale's bright generator, the inversion of the perfect 3-mosstep, whose range is around that of a neutral sixth. | ||
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*The '''major 4-mosstep''', whose range coincides with that of a perfect fourth; | *The '''major 4-mosstep''', whose range coincides with that of a perfect fourth; | ||
*The '''minor 6-mosstep''', the inversion of the major 4-mosstep, whose range coincides with that of a perfect 5th. | *The '''minor 6-mosstep''', the inversion of the major 4-mosstep, whose range coincides with that of a perfect 5th. | ||
=== Quartertone and tetrachordal analysis=== | === Quartertone and tetrachordal analysis=== | ||