Chromatic scale common conception of the chromatic scale before the 13th century was the Pythagorean chromatic scale (). Due to a different tuning technique, the twelve semitones in this scale have two slightly different sizes. Thus, the scale is not perfectly symmetric. Many other tuning systems, developed in the ensuing centuries, share a similar asymmetry. In Pythagorean tuning (3-limit just intonation) the chromatic scale is tuned as follows, with sharps higher than their enharmonic flats: These are 17-EDO Pythagorean tuning approximations. In 5-limit just intonation the chromatic scale, Ptolemy's intense chromatic scale, is as follows, with flats higher than their enharmonic sharps,
Blues scale Blues scale The term blues scale refers to several different scales with differing numbers of pitches and related characteristics. The hexatonic, or six-note, blues scale consists of the minor pentatonic scale plus the 5th degree of the original heptatonic scale. This added note can be spelled as either a 5 or a 4. \override Score.TimeSignature #'stencil = ##f \relative c' { </score> A major feature of the blues scale is the use of blue notes; however, since blue notes are considered alternative inflections, a blues scale may be considered to not fit the traditional definition of a scale. At its