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Musical key finder

Estimate a track's key from its pitch-class energy, without uploading it.

Processed in your browser, never uploaded. Analyzes the first 90 seconds. Use WAV or MP3 if your browser cannot decode FLAC.

How to use this tool

Choose a music file and analyze its first 90 seconds. The estimator compares pitch-class energy with major/minor key profiles. Complex harmony and modulation make automatic key detection uncertain.

Ready for the final pass?

Use these measurements to understand your mix, then compare a free reference-mastered preview. Your ears remain the final judge.

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