Bbdim7

The Bbdim7 chord sounds intensely tense and symmetrical, often used as a passing chord. It is built from the notes A#, C#, E, G, stacking 4 tones to create its distinctive sound. This chord is commonly heard in jazz, and gypsy jazz.

Notes: A# – C# – E – G  |  Formula: 1 – b3 – b5 – bb7