Key and mode together
C major and A minor share notes but do not create the same harmonic center. The result keeps root and mode visible as one decision.
Key Detector Online
Upload a song or sample to estimate key, mode, Camelot code, and confidence for mixing, transposition, or harmonic planning.
Browser analysisKey and modeNo credits required
Key Detector capabilities at a glance
The result is a harmonic starting point, not a promise that every section has one unchanging key.
- Input
- A browser-decodable audio file up to 100 MB
- Output
- Estimated key, major/minor mode, Camelot code, confidence
- Workflow
- Choose a file, analyze tonal content, review the estimate
- Privacy
- The selected audio stays in the browser during analysis
Key information for the next musical decision
Key Detector combines pitch-class energy with major and minor reference profiles and keeps the output easy to verify by ear.
Camelot code included
Use the code as a compact reference when planning harmonic DJ transitions or comparing compatible tracks.
Confidence with context
A strong tonal center is easier to estimate than a modulating, modal, noisy, or percussion-heavy recording. Review the signal before committing.
How to use a Key Detector
A key estimate is most useful when you treat it as an informed starting point for listening and arrangement.
- 01
Upload a representative file
Choose a full song or a section with harmony. Avoid relying on a drum-only intro when the tonal material begins later.
- 02
Run local analysis
The browser measures energy across twelve pitch classes and compares the aggregate profile with major and minor tonal templates.
- 03
Check the musical center
Listen to the chorus, bass movement, and final resting note. Use the estimate to guide a decision, then confirm it in the context of the arrangement.
Where a key estimate helps
Knowing the likely key reduces friction when a song needs to fit another musical element.
Harmonic mixing
Compare a source track's Camelot code with another track before trying a transition.
Transposition
Start from an estimated tonic when moving a loop, vocal, or instrumental idea into a different register.
Songwriting references
Give collaborators a useful tonal label when discussing a demo, cover, or melodic variation.
Read a key estimate like a musician
Automatic key detection works best when the source has enough sustained tonal information.
Use more than the intro
Percussion-only openings, sound effects, and spoken passages contain little harmonic evidence. A verse or chorus often gives the estimator a better tonal center.
Watch for relative major and minor
A major key and its relative minor use the same pitch collection. The bass, melody landing points, and emotional center help decide which label fits the song.
Expect changes in real arrangements
Modulation, modal writing, detuned recordings, and layered harmony can make one global key an approximation. Use the result to focus your listening, not to replace it.
Key Detector questions, answered
Direct answers about musical key estimates, Camelot notation, files, and privacy.
Build the harmonic picture
Pair key information with rhythm, chords, and precise audio preparation.
Find the song tonal center
Upload the passage you are working on and use the key estimate to guide your next harmonic choice.
Detect key