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Altered

Dominant seventh, flat five chords

Dominant 7 with b5: C-E-Gb-Bb. Formula: 1-3-b5-b7. Whole-tone scale flavor.

In every key

The same shape, moved. The symbols below are spelled the way the app spells them, which is the spelling the chord's own scale asks for rather than whichever accidental is easier to type.

  • C7b5
  • Db7b5
  • D7b5
  • Eb7b5
  • E7b5
  • F7b5
  • F#7b5
  • G7b5
  • Ab7b5
  • A7b5
  • Bb7b5
  • B7b5

Voicings

Written in C, because that is the key the encyclopedia authors them in; every one transposes unchanged.

Rootless (3-b5-b7-9)

E · Gb · Bb · D

advanced

Root Position

C · E · Gb · Bb

intermediate

Octaves shown are the app's default ascending voicing.

Tritone-equivalent Spread

Gb · Bb · E · C

advanced

C7b5 ≡ Gb7b5 — same 4 notes, different bass

Where it turns up

Bebop and Chick Corea favorite. Tritone-equivalent to Gb7b5 (same 4 notes).

Commonly swapped with

  • C7alt
  • Gb7b5
  • C7

The PDF book

The Ultimate Jazz Piano Voicings and Chord Atlas

From shells to advanced voicings. A practice book first, with all the theory you need explained in plain words.

  • 7 levels of voicings for every ii‑V‑I chord, from shells to quartal and upper-structure color
  • A 30-day plan and a 12-week schedule, 15 minutes a day
  • A PDF you download and keep, no subscription

See inside the book