C 7(alt)

The C 7(alt) chord consists of the C (Perfect unison), E (Major third), G# (Minor sixth), A# (Minor seventh) and D# (Minor tenth) notes.

Piano keyboard showing the notes for a C 7(alt) chord

How to play the C 7(alt) chord

  1. Find C (Root) on the piano keyboard
  2. Add E (Major third) — 4 semitones above C
  3. Add G# (Minor sixth) — 8 semitones above C
  4. Add A# (Minor seventh) — 10 semitones above C
  5. Add D# (Minor tenth) — 15 semitones above C
  6. Press all 5 notes simultaneously to sound the C 7(alt) chord

Related slash chords