Chord · 9ths

B♭9sus4 — B♭ 9th Sus 4

B♭9sus4 is the B♭ 9th sus 4 chord. It is built on the root B♭ with perfect 4th (E♭), perfect 5th (F), minor 7th (A♭) and major 9th (C) above it — the formula 1 4 5 ♭7 9, sounding the notes B♭ E♭ F A♭ C. On the piano it sits at Bb (octave 3) and above in the library's voicing; the same 5 notes in any octave are still B♭9sus4.

Root
B♭
Quality
9th Sus 4
Formula
1 4 5 ♭7 9
Notes
B♭ E♭ F A♭ C

On the keyboard

B♭9sus4 on the piano keyboard: B♭ E♭ F A♭ CB♭E♭FA♭C

The notes of B♭9sus4

DegreeNoteInterval from the rootPitch
1B♭rootB♭3
4E♭perfect 4thE♭4
5Fperfect 5thF4
♭7A♭minor 7thA♭4
9Cmajor 9thC5

Other 9ths on B♭

B♭9B♭maj9B♭m9B♭mMaj9B♭9♭5B♭9♯5B♭m9♭5

9th Sus 4 chords on every root

C9sus4D♭9sus4D9sus4E♭9sus4E9sus4F9sus4F♯9sus4G9sus4A♭9sus4A9sus4B9sus4

Part of the chord reference. See also the scales and the keys.