Space plays and stops
- Notes and intervals
- FM3AM3C#2Eb
- Extends
- F Dominant 7
F Augmented 7, written F7#5, is built from F, A, C# and Eb: the root, major 3rd, sharp 5th and minor 7th.
Its 3rd and 7th, A and Eb, 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. B7, a tritone away, has the same two notes the other way up, so it can stand in for F7#5 as its tritone substitute.