Cdim
The diminished chord stacks two minor thirds: root, flat third and flat fifth. It is tense and unstable, so it is mostly used as a passing chord that leads into the next one.
Root
Type
D#
C
F#
C
Shape
The diminished chord stacks two minor thirds: root, flat third and flat fifth. It is tense and unstable, so it is mostly used as a passing chord that leads into the next one.