The Bb dorian / A# dorian scale has 7 notes: Bb, C, Db, Eb, F, G and Ab. Its formula is 1 2 b3 4 5 6 b7 and its steps, in tones, are 1 – ½ – 1 – 1 – 1 – ½ – 1.
The dorian mode is a minor scale with a major sixth: a minor sound that is less dark, widely used in jazz, funk and rock.
Bb dorian
Bb C Db Eb F G Ab · 1 2 b3 4 5 6 b7
Colored dots: notes of the scale, the root is the darkest.