Utilumo
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Updated September 1, 2026

BPM, Key, and Camelot Reference

Tempo and key estimates are useful for remixing, DJ sets, sample matching, and editing. This reference keeps the result labels clear and maps musical keys to Camelot notation.

Camelot key chart

KeyCamelotRelative key
G# Minor1AB Major (1B)
B Major1BG# Minor (1A)
D# Minor2AF# Major (2B)
F# Major2BD# Minor (2A)
A# Minor3AC# Major (3B)
C# Major3BA# Minor (3A)
F Minor4AG# Major (4B)
G# Major4BF Minor (4A)
C Minor5AD# Major (5B)
D# Major5BC Minor (5A)
G Minor6AA# Major (6B)
A# Major6BG Minor (6A)
D Minor7AF Major (7B)
F Major7BD Minor (7A)
A Minor8AC Major (8B)
C Major8BA Minor (8A)
E Minor9AG Major (9B)
G Major9BE Minor (9A)
B Minor10AD Major (10B)
D Major10BB Minor (10A)
F# Minor11AA Major (11B)
A Major11BF# Minor (11A)
C# Minor12AE Major (12B)
E Major12BC# Minor (12A)

Tempo confidence signals

SignalMeaning
Stable repeated beatBPM is usually easier to estimate.
Half-time or double-timeThe same groove may read as two related tempos, such as 64 BPM and 128 BPM.
Sparse percussionThe analyzer may return low confidence or no BPM.
Tempo changes or live timingA single BPM may be only a rough average.
Estimates, not fingerprintsA local BPM/key analyzer does not identify songs, query music databases, or prove a result is musically final. It estimates signal features from the file you provide.

References

Questions

Is Camelot A major or minor?

Camelot A codes are minor keys, and Camelot B codes are major keys.

Why can one song have two possible BPM values?

Tempo can be interpreted from a main pulse or a subdivision. Half-time and double-time values help catch that ambiguity.