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.
- C7alt
- Db7alt
- D7alt
- Eb7alt
- E7alt
- F7alt
- F#7alt
- G7alt
- Ab7alt
- A7alt
- Bb7alt
- B7alt
Voicings
Written in C, because that is the key the encyclopedia authors them in; every one transposes unchanged.
Basic (1-3-b7-b9)
C · E · Bb · Db
advanced
Rootless (3-b7-b9-b5)
E · Bb · Db · Gb
advanced
Rootless Altered (b9-3-b7-#9)
Db · E · Bb · D#
expert
Altered tones: b9 (Db), 3 (E), b7 (Bb), #9 (D#)
Herbie #9 Cluster (3-b7-b9-#9)
E · Bb · Db · D#
expert
Tight b9/#9 cluster over the guide tones — Herbie altered crunch
Upper Structure bVI (b7-b13-1-#9)
Bb · Ab · C · Eb
expert
Ab-major upper structure over the b7 — the bVI altered sound
Rootless Altered Spread (3-b13-b9-#11)
E · Ab · Db · F#
expert
Rootless altered spread — 3 + the b9/#11/b13 alterations
Upper Structure #IV (F#) (#11-b7-b9)
F# · A# · C#
expert
RH 1-3-5 across F#-A#-C#; spread voicing, let the top b9 sing above the b7.
Where it turns up
Creates maximum tension! Used in bebop and modern jazz for dramatic V7 resolutions. Very dissonant but resolves beautifully.
Commonly swapped with
- C7#9
- C7b9
- C7#5
- Gb7
Progressions that use it
Every one of these is written out with the hands on a keyboard and on a stave.
