seventh sharp eleven chord generator
Build and Listen to Seventh Sharp Eleven Chords
This explicit dominant seventh sharp-eleven reference contains C, E, G, B-flat and F-sharp. The augmented eleventh is eighteen semitones above C. A ninth is not included because the chosen symbol is 7(sharp11), not 9(sharp11).
Compare C7(sharp11) with C7(flat5). F-sharp and G-flat share a pitch class, but the current chord also keeps G natural. Play those two adjacent pitches separately, then arpeggiate to hear where the upper extension is placed.
Play the instrument ↑- Chord formula
- 1 · 3 · 5 · ♭7 · ♯11
- Semitone offsets
- 0 · 4 · 7 · 10 · 18
- C reference
- C · E · G · B♭ · F♯
- Sound
- Sine reference · A4 = 440 Hz
Raised eleventh with the perfect fifth retained
This explicit dominant seventh sharp-eleven reference contains C, E, G, B-flat and F-sharp. The augmented eleventh is eighteen semitones above C. A ninth is not included because the chosen symbol is 7(sharp11), not 9(sharp11).
Sharp eleven and flat five are enharmonic intervals, not interchangeable full chord formulas. The sharp-eleven chord displayed here includes a perfect fifth and uses an F letter over C, while flat-five replaces G with G-flat.
- Degree 1 is 0 semitones above the root in this reference.
- Degree 3 is 4 semitones above the root in this reference.
- Degree 5 is 7 semitones above the root in this reference.
- Degree 7 is 10 semitones above the root in this reference.
- Degree 11 is 18 semitones above the root in this reference.
A listening test for 7(♯11)
Compare C7(sharp11) with C7(flat5). F-sharp and G-flat share a pitch class, but the current chord also keeps G natural. Play those two adjacent pitches separately, then arpeggiate to hear where the upper extension is placed.
The Compare seventh flat five button retains your chosen root and octave and plays the comparison in root position. Set the current chord to root position for a direct comparison. The note buttons let you isolate the chord member that makes this quality different.
Follow the selected bass through each voicing
This 5-tone reference offers 5 positions. Root position starts with degree 1; First inversion starts with degree 3; Second inversion starts with degree 5; Third inversion starts with degree 7; Fourth inversion starts with degree 11. The bass suffix beneath the chord symbol identifies the actual lowest tone.
Root position preserves compound ninths, elevenths and thirteenths at their original height. The inversion selector first moves the extensions into one octave, sorts by sounding pitch and rotates from the selected degree. These close pitch-class study voicings are different from the complete extended root-position stack; they are not recommended jazz fingerings.
A sharp eleventh can color a dominant chord while avoiding the natural eleventh against the major third. Some performers omit the fifth; this reference retains it explicitly so the distinction from a flat-five formula is visible.
Check C, F and A before transposing further
Begin with C and confirm C · E · G · B♭ · F♯. Use the F and A example buttons to transpose the same interval collection. Follow the MIDI values if an enharmonic spelling looks unfamiliar: changing the root shifts every sounding note by the same interval.
Use Root octave 2 for a lower reference or octave 5 for a higher one. A root change keeps your selected voicing; the example buttons return to root position. Reset restores C, octave 3 and root position. Stop sound ends the currently active chord or arpeggio.
What playback and the WAV file contain
The displayed notes are synthesized locally using sine waves after your click. The tool does not create a progression, transcribe a song, provide guitar fingering or simulate an acoustic instrument. No camera, microphone, registration or file upload is needed.
Download WAV saves the currently displayed voicing as a 2.4-second mono PCM file at 44.1 kHz with a short fade. It does not export the comparison chord or an arpeggiated performance. If Web Audio is unavailable, the note display and WAV download remain usable.
Theoretical note names preserve each degree and may use double accidentals. Equal-tempered playback gives enharmonic notes the same frequency. This browser tool does not add new extended-chord gestures to the webcam instrument; that instrument has its own triad, inversion and seventh controls.
Play the separate gesture instrument → · Local processing and privacy →
Answers before you play
Seventh Sharp Eleven Chord Questions
What are the notes in C seventh sharp eleven?
C · E · G · B♭ · F♯. The formula is 1 · 3 · 5 · ♭7 · ♯11, with semitone offsets 0, 4, 7, 10, 18. These are the complete notes sounded by this generator in root position.
How does this differ from seventh flat five?
Compare C7(sharp11) with C7(flat5). F-sharp and G-flat share a pitch class, but the current chord also keeps G natural. Play those two adjacent pitches separately, then arpeggiate to hear where the upper extension is placed.
Are these standard performance voicings?
A sharp eleventh can color a dominant chord while avoiding the natural eleventh against the major third. Some performers omit the fifth; this reference retains it explicitly so the distinction from a flat-five formula is visible. The tool states its complete formula and uses close pitch-class rotations for inversion study. Performance omissions and spacing depend on the instrument and musical context.
Can I play and export without a camera?
Yes. Click Play chord or Play arpeggio for local audio. Download WAV saves the displayed chord even if live audio is unavailable. Camera and microphone permission are never requested.
Why does the displayed accidental look unusual?
Sharp eleven and flat five are enharmonic intervals, not interchangeable full chord formulas. The sharp-eleven chord displayed here includes a perfect fifth and uses an F letter over C, while flat-five replaces G with G-flat. Note letters follow chord degrees; MIDI numbers show the actual pitches at A4 = 440 Hz.