Heartbreak Warfare
John Mayer — Battle Studies
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DMajor
Scale chords · D major
IDMajor
iiEMinor
iiiF#Minor
IVGMajor
VAMajor
viBMinor
vii°C#Dim
Chords used
D
A
F#m7
G6
Fmaj7
Key detection
experimentalD majoralgorithm result
AI analysisD major✓ agrees
1D major
100%
2A major
84%
3G major
52%
4D minor
51%
5B minor
44%
6F# minor
42%
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