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Scale · Reference entry

A♯ Half-Whole Diminished Scale

Half-Whole Diminished Scale · A♯ – B – C♯ – C♯♯ – E – E♯ – F♯♯ – G♯ – A♯ · intervals P1-m2-m3-M3-d5-P5-M6-m7

The A♯ Half-Whole Diminished Scale contains the notes A♯, B, C♯, C♯♯, E, E♯, F♯♯, and G♯. Its step pattern is H-W-H-W-H-W-H-W. An octatonic alternating half and whole steps — symmetrical, used over dominant 7♭9 chords.

At the keyboard

A# · B · C# · C## · E · E# · F## · G#
Flashcards · Scale
Three questions on A♯ Half-Whole Diminished Scale
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The A♯ Half-Whole Diminished scale contains eight notes: A♯, B, C♯, C♯♯, E, E♯, F♯♯, and G♯. It follows the whole-step / half-step pattern H-W-H-W-H-W-H-W.

A♯ Half-Whole Diminished Scale Notes

DegreeNameNoteInterval
1RootA♯P1
♭2Minor 2ndBm2
♭3Minor 3rdC♯m3
3Major 3rdC♯♯M3
♭5Diminished 5thEd5
5Perfect 5thE♯P5
6Major 6thF♯♯M6
♭7Minor 7thG♯m7
8OctaveA♯P8

Key Signature

The A♯ Half-Whole Diminished Scale doesn’t line up with a single major or minor key, so it has no standard key signature. Its notes are written with accidentals as needed.

Accidentals

A♯C♯C♯♯E♯F♯♯G♯

A♯ Half-Whole Diminished Scale — Frequently Asked Questions

What are the notes of the A♯ Half-Whole Diminished Scale on piano?
The A♯ Half-Whole Diminished Scale uses the notes A♯ – B – C♯ – C♯♯ – E – E♯ – F♯♯ – G♯ – A♯. Play them in order from the root up to the octave, hands separately first, then together.
What notes are in the A# Half-Whole Diminished Scale?
The A# Half-Whole Diminished Scale contains eight notes: A# – B – C# – Cx – E – E# – Fx – G#. The notes table above shows each note with its scale degree and interval from the root.
How many sharps or flats does A# Half-Whole Diminished have?
The A# Half-Whole Diminished Scale doesn't correspond to a single major or minor key, so it has no standard key signature. Its notes are written with accidentals as needed: A♯, C♯, C♯♯, E♯, F♯♯, G♯.
What does the A# Half-Whole Diminished Scale sound like?
The A# Half-Whole Diminished Scale has a distinctive sound shaped by its specific interval pattern. Listen to the audio playback above to hear the character on every note.

Related Tools

Circle of FifthsVisualize key relationships, relative minors, and key signatures.Chord FinderLook up any chord — see the notes, hear it, and play along.Practice RoomPlug in a MIDI keyboard and get real-time feedback on every chord and scale.Chord DrillTimed drills to build speed and recognition across all chord types.MIDI MonitorLive MIDI message stream with note names, velocity, and a scrolling staff.

References & Further Reading

The note names, intervals, fingering, and harmony on this scale page are grounded in the following sources. Public domain treatises and scores are linked to their full text; primary data is piano.org's own interval-derived reference dataset — continuously maintained and human-verified, with no fixed publication date.

  1. 1

    Jadassohn, Salomon(1883)

    A Manual of Harmony

    Public domain treatise
  2. 2

    Prout, Ebenezer(1889)

    Harmony: Its Theory and Practice

    Public domain treatise
  3. 3

    Goetschius, Percy(1889)

    The Material Used in Musical Composition

    Public domain treatise
  4. 4

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Entry reviewed and maintained by Justin Evans. Corrections are read and applied.Report an error

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