Bbsus4(#4) Suspended
The Bbsus4(#4) chord is built from the notes Bb – Eb – F – E.
Piano sound loads on first tap.
Chord tones, one by one
Root
The fundamental note the chord is built on — Bb.
Suspended 4th
A perfect 4th replaces the third — tense, wants to resolve (sus4).
Perfect fifth
Seven semitones — the most stable interval, reinforces the root.
Sharp eleventh (♯11)
A ♯11 — the bright, floating Lydian color.
🎹 Modal analysis
This chord is so rich it doesn't fit a single scale: it's a polychord (an “upper structure”) that stacks tensions from several scales at once. It doesn't work like a dominant that “wants” to resolve — it's pure color: picture one triad floating over an unrelated bass, the kind of sound used in reharmonization and modal passages. To make sense of it, follow the note-by-note breakdown above.
🎸 Genres
Modern jazz · Fusion · Film & TV scoring · Impressionism