A piano reference: chords, scales, theory & ear training.
/
Chord · Reference entry
E 7♭5♯9
7♭5♯9 · E – G♯ – B♭ – D – F♯♯ · intervals P1-M3-d5-m7-A9
The E 7♭5♯9 chord (E7♭5♯9) contains the notes E, G♯, B♭, D, and F♯♯. Its interval formula is R-M3-d5-m7-A9. A dominant 7th with a lowered 5th and raised 9th — from the altered scale, common in modern jazz.
Maintained for accuracy · Last updated July 2026 · How we review
Flashcards · Chord
Three questions on E 7♭5♯9
Answer on the keyboard, not with buttons. No login required.
E7♭5♯9
The E 7♭5♯9 chord is a five-note chord made up of E, G♯, B♭, D, and F♯♯. It is built from a root, major third, diminished fifth, minor seventh, and augmented ninth.
Construction
E 7♭5♯9 = Root + Major 3rd + Diminished 5th + Minor 7th + Minor 3rd = E · G♯ · B♭ · D · F♯♯
Note
Interval
Degree
E
Root
1
G♯
Major 3rd
3
B♭
Diminished 5th
♭5
D
Minor 7th
♭7
F♯♯
Minor 3rd
♭3
Key Signature
A chord has no key signature of its own, but the E 7♭5♯9 is the tonic (I) chord of E Major, whose key signature has 4 sharps (F♯, C♯, G♯, D♯).
F♯C♯G♯D♯
Order of sharps
Sharps are added to a key signature in a fixed order. Each new sharp key adds the next sharp on the list.
F♯C♯G♯D♯A♯E♯B♯
Mnemonic:Father Charles Goes Down And Ends Battle
Chords in the Key of E Major
These are the triads built on each degree of the E major scale:
Keep going with the 7♭5♯9 chord — these pages cover the underlying theory, the connected reference material, and the practice tools that work with this chord.
The note names, intervals, fingering, and harmony on this chord 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.