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G♯ Major 9♯11The G♯ Major 9♯11 chord is a six-note chord made up of G♯, B♯, D♯, F♯♯, A♯, and C♯♯.
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Today at the piano
Tuesday, August 25, 2026.
On this day
1918 Leonard Bernstein, conductor, composer, and pianist, was born in Lawrence, Massachusetts.
Term of the day
Minor 11th ChordThe minor 11th chord extends the minor 9th by adding a perfect 11th, creating a rich, dark, and atmospheric voicing.
Did you know
A standard acoustic or full-size digital piano has 88 keys, spanning A0 to C8.
How many keys does a piano have ›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 musicNotesAll 88 keys named, A0 to C8, with frequency and enharmonicsVoicingsChord shapes and techniques under the handModesEvery mode, in every key
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