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→Symmetric
* Petrucci
= Symmetric Scales =''Symmetric Scales'' are scales that divide an octave into 2 or more equal parts. In other words, the whole/half pattern of notes for each piece will be identical and there are no leftover notes. Here is an example of a symmetric scale I am just inventing: R m2 P4 d5 m6 M7 h * h h * h We can divide this into two equal parts: R m2 P4 d5 d5 m6 M7 R h * h The most symmetric scale is the chromatic scale: R m2 M2 m3 M3 P4 d5 P5 m6 M6 m7 M7 R h h h h h h h h h h h h Which can be represented as follows: R m2 M2 m3 M3 P4 d5 d5 P5 m6 M6 m7 M7 R h h h h h h R m2 M2 m3 M3 M3 P4 d5 P5 m6 m6 M6 m7 M7 R h h h h R m2 M2 m3 m3 M3 P4 d5 d5 P5 m6 M6 M6 m7 M7 R h h h R m2 M2 M2 m3 M3 M3 P4 d5 d5 P5 m6 m6 M6 m7 m7 M7 R h h R m2 m2 M2 M2 m3 m3 M3 M3 P4 P4 d5 d5 P5 P5 m6 m6 M6 M6 m7 m7 M7 M7 R h * If the scale is symmetric by dividing the octave into halves, it must have the a4/tt/d5 note.* Pentatonic and Hexatonic scales cannot be symmetric as 5 and 7 are prime numbers that cannot be subdivided into 2 or more groups of equal notes Common symmetric scales include:* Whole Tone* Octatonic (Whole-Half and Half-Whole)* Chromatic* Augmented = Synthetic Scales =''Synthetic Scales'' are formed by lowering or raising a single note of an existing scale by a half-step.