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B 7♯9♯11The B 7♯9♯11 chord is a six-note chord made up of B, D♯, F♯, A, C♯♯, and E♯.
Piano chords, scales & theory. Full MIDI.
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Today at the piano
Wednesday, August 12, 2026.
On this day
1992 John Cage, who invented the prepared piano, died in Manhattan.
Term of the day
Dominant 11th ChordThe dominant 11th chord stacks a perfect 11th (4th) on top of a dominant 9th, creating a thick, suspended, funky voicing.
Did you know
Western music divides each octave into 12 equal semitones: 7 white keys and 5 black keys.
Piano by the numbers ›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