F#dim7

The F#dim7 chord sounds intensely tense and symmetrical, often used as a passing chord. It is built from the notes F#, A, C, D#, stacking 4 tones to create its distinctive sound. This chord is commonly heard in jazz, and gypsy jazz.

Notes: F# – A – C – D#  |  Formula: 1 – b3 – b5 – bb7