viio7 roman degree
The FULLY diminished seventh — maximal tension, a symmetrical chord of stacked minor thirds with dominant function in the minor mode. Everything points toward resolution.
Where it lives
11semitones from the tonic
Minor mode
diminished
Hear it in context: i-viio7-bVII-bVI
Piano sound loads on first tap. Resolved in the key of C — every chord links to its full analysis.