The 嬰ハ Half-Whole Diminished scale contains 8 notes: 嬰ハ, ニ, ホ, ヘ, ト, 変イ, 変ロ, ロ.
The half-whole diminished scale alternates half steps and whole steps across eight notes. It supplies the flat ninth, sharp ninth, sharp eleventh and thirteenth over a dominant chord, which makes it the standard altered dominant sound in jazz.
嬰ハ Half-Whole Diminished is a scale, not a key. It has no key signature of its own — music that uses it is normally written in the key signature of its parent scale, with any extra accidentals added as they occur.
| 音度 | 音 | 音程 | Semitones |
|---|---|---|---|
| 1 | 嬰ハ | P1 | 0 |
| 2 | ニ | m2 | 1 |
| 3 | ホ | m3 | 3 |
| 4 | ヘ | M3 | 4 |
| 5 | ト | TT | 6 |
| 6 | 変イ | P5 | 7 |
| 7 | 変ロ | M6 | 9 |
| 8 | ロ | m7 | 10 |
Every scale type that starts on 嬰ハ, for comparison.
The 嬰ハ Half-Whole Diminished scale has 8 notes: 嬰ハ, ニ, ホ, ヘ, ト, 変イ, 変ロ, ロ.
The 嬰ハ Half-Whole Diminished scale follows the step pattern H–W–H–W–H–W–H–W, where H is a half step and W is a whole step.