Space plays and stops
- Notes and intervals
- FbM3Abm3Cbm3EbbM3Gb5Db
- Extends
- Fb Dominant 7
Fb Dominant 13, written Fb13, is built from Fb, Ab, Cb, Ebb, Gb and Db: the root, major 3rd, 5th, minor 7th, 9th and 13th.
Its 3rd and 7th, Ab and Ebb, are its guide tones: they say what kind of chord it is, so voicings are built around them and the root is often left to the bass. Bb7, a tritone away, has the same two notes the other way up, so it can stand in for Fb13 as its tritone substitute.