Chord & FretC7(b13) — dominant flat thirteenth
Notes on C: C – E – G – Bb – AbFormula: 1 – 3 – 5 – b7 – b13In the formula, the numbers count steps of the major scale starting from the note that names the chord; "b" lowers a half step, "#" raises one — and a slash names the bass note.
The 7(b13) is a dark dominant, with the thirteenth lowered. The tension pulls strongly toward resolution.
The same chord on all four instruments
Where to use it: A dark resolution, especially to a minor chord.
The shapes of C7(b13) don't end on this page — the whole neck holds dozens. In Chord & Fret, you check it note by note, playing any shape as an arpeggio; open every variation on the neck, grouped by bass note; and set a capo — the diagrams redraw above it. Start free. Unlock everything with Pro. 100% offline.
Unlock in Chord & Fret →Part of the Altered dominants family.