Ben Johnston's notation: Difference between revisions

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! Symbol !! Ratio !! Symbol !! Ratio
! Symbol !! Ratio !! Symbol !! Ratio
|-
|-
| + || [[81/80]] || - || 80/81
| + || [[81/80]] || − || 80/81
|-
|-
| ♯ || [[25/24]] || ♭ || 24/25
| ♯ || [[25/24]] || ♭ || 24/25
|-
|-
| 7 || 35/36 || <span style="display: inline-block; transform: rotate(180deg)">7</span> || [[36/35]]
| 7 || 35/36 || <span style="display: inline-block; transform: rotate(180deg);">7</span> || [[36/35]]
|-
|-
| ↑ || [[33/32]] || ↓ || 32/33
| ↑ || [[33/32]] || ↓ || 32/33
|-
|-
| 13 || [[65/64]] || <span style="display: inline-block; transform: rotate(180deg)">13</span> || 64/65
| 13 || [[65/64]] || <span style="display: inline-block; transform: rotate(180deg);">13</span> || 64/65
|-
|-
| 17 || [[51/50]] || <span style="display: inline-block; transform: rotate(180deg)">17</span> || 50/51
| 17 || [[51/50]] || <span style="display: inline-block; transform: rotate(180deg);">17</span> || 50/51
|-
|-
| 19 || 95/96 || <span style="display: inline-block; transform: rotate(180deg)">19</span> || [[96/95]]
| 19 || 95/96 || <span style="display: inline-block; transform: rotate(180deg);">19</span> || [[96/95]]
|-
|-
| 23 || [[46/45]] || <span style="display: inline-block; transform: rotate(180deg)">23</span> || 45/46
| 23 || [[46/45]] || <span style="display: inline-block; transform: rotate(180deg);">23</span> || 45/46
|-
|-
| 29 || [[145/144]] || <span style="display: inline-block; transform: rotate(180deg)">29</span> || 144/145
| 29 || [[145/144]] || <span style="display: inline-block; transform: rotate(180deg);">29</span> || 144/145
|-
|-
| 31 || [[31/30]] || <span style="display: inline-block; transform: rotate(180deg)">31</span> || 30/31
| 31 || [[31/30]] || <span style="display: inline-block; transform: rotate(180deg);">31</span> || 30/31
|}
|}


Johnston combines the symbols 7 <span style="display: inline-block; transform: rotate(180deg)">7</span> ↑ ↓ with ♯ ♭ if symbols from both categories are present.
Johnston combines the symbols 7 <span style="display: inline-block; transform: rotate(180deg);">7</span> ↑ ↓ with ♯ ♭ if symbols from both categories are present.


A circle of just fifths is given by ... D♭-- A♭- E♭- B♭- F C G D A+ E+ B+ F♯++ ..., with a plus or minus added for every loop around the ends of the core F A C E G B D sequence. The odd harmonic series up to 31 starting on C is given by C G E B♭7 D F↑ A♭13 B C♯17 E♭19 F+7 F♯+23 G♯ A+ B♭29 B31.
A circle of just fifths is given by ... D♭&#x2212;&#x2212; A♭&#x2212; E♭&#x2212; B♭&#x2212; F C G D A+ E+ B+ F♯++ ..., with a plus or minus added for every loop around the ends of the core F A C E G B D sequence. The odd harmonic series up to 31 starting on C is given by C G E B♭7 D F↑ A♭13 B C♯17 E♭19 F+7 F♯+23 G♯ A+ B♭29 B31.


Johnston's notation sacrifices some mathematical purity compared to [[Helmholtz-Ellis notation]], as it is based on 4:5:6 chords rather than [[Pythagorean tuning]]. This comes at the possible advantage of fewer inflection markers needed for music that emphasizes the 5-limit.
Johnston's notation sacrifices some mathematical purity compared to [[Helmholtz-Ellis notation]], as it is based on 4:5:6 chords rather than [[Pythagorean tuning]]. This comes at the possible advantage of fewer inflection markers needed for music that emphasizes the 5-limit.