21 Guns
Green Day — 21st Century Breakdown
0:00/0:00
FMajor
Scale chords · F major
IFMajor
iiGMinor
iiiAMinor
IVA#Major
VCMajor
viDMinor
vii°EDim
Chords used
Dm
A#
F
C
Key detection
experimentalF majoralgorithm result
AI analysisF major✓ agrees
1F major
100%
2D minor
60%
3C major
59%
4A# major
58%
5G minor
43%
6C minor
38%
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