Space plays and stops
- Notes and intervals
- BbM3D2E2F#m3A
- Extends
- Bb Major 7
Bb Major 7 #4#5, written Bbmaj7#4#5, is built from Bb, D, E, F# and A: the root, major 3rd, sharp 11th, sharp 5th and major 7th.
Its 3rd and 7th, D and A, 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.