A#dim7 chord

A#dim7 chord for piano with keyboard diagram.
Explanation: The A#dim7 is a four-note chord. A#dim7 can also be written as A#°7.
Theory: The A#dim7 is a diminished chord extended with a minor third.

A#dim7

Abdim7 chord diagram
Notes: A# - Db - E - G / A# - Db - E - F##
Left hand: 5-3-2-1
Right hand: 1-2-4-5

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A# chord categories

A# A#m A#7 A#m7 A#maj7 A#mM7 A#6 A#m6 A#6/9 A#5 A#9 A#m9 A#maj9 A#11 A#m11 A#maj11 A#13 A#m13 A#maj13 A#add A#7-5 A#7+5 A#sus A#dim A#dim7 A#m7b5 A#aug A#aug7