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A♯ Diminished 7thThe A♯ Diminished 7th chord is a four-note chord made up of A♯, C♯, E, and G.
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Today at the piano
Thursday, August 13, 2026.
On this day
1919 George Shearing, the British jazz pianist and bandleader, was born in Battersea, London.
Term of the day
Locrian Sharp 2 ScaleThe Locrian ♯2 scale is the sixth mode of the melodic minor scale, a subtle but important variation on the standard Locrian mode that raises the second degree from flat to natural.
Did you know
The major scale has seven modes: Ionian, Dorian, Phrygian, Lydian, Mixolydian, Aeolian, and Locrian.
Modes ›The index
Look anything up directly, in both enharmonic spellings, C♯ and D♭ alike.
ChordsEvery chord type in every key, triads to altered dominantsScalesMajor, minor, pentatonic, blues, bebop and beyondToolsVirtual piano, chord finder, drills, all in the browserTheoryShort articles in teaching order, plus two guided seriesSongsGuides to iconic pieces, and easy songs to start withProgressionsCadences and the progressions behind real musicModesEvery mode, in every keyVoicingsChord shapes and techniques under the hand
Learn and practice
Virtual PianoA keyboard with real sampled sound: mouse, touch, or your computer keys.Play itChord FinderPlay or click any combination of notes and see what chord it makes.Open the toolLearn Piano: the step-by-step pathAn ordered course from your first notes through chords, scales and theory.Follow the pathCircle of FifthsThe interactive wheel: keys, relatives, and how they connect.Explore it