B Minor 9th

Fretboard

About

The Bm9 minor ninth (B–D–F♯–A–C♯) extends a minor 7 with a ninth. The C♯ sits above the A and adds an expressive, singing quality. The essential tones are the D (minor identity), A (seventh extension), and C♯ (defining color); the 5th can be dropped to keep voicings clear. m9 chords appear frequently in jazz, neo-soul, and ambient styles as tonic or pre-dominant harmony — for example as ii in a major ii–V–I (Bm9 → E9 → AMaj9). Compared to Bm7, the added 9th gives more emotional dimension without increasing tension.

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