Tunary InstrumentsHow to use song key finder
- Select an audio file with a clear melody or harmony and press Analyse file.
- Read the likely major or minor key and compare the alternative suggestions.
- Open the scale explorer or chord generator with the chosen key.
Learn the music behind it
A little more about this tool
The key finder compares the balance of pitch classes in the audio with major and minor key profiles. It estimates a tonal centre rather than transcribing notes or chords. Relative keys such as C major and A minor share the same notes, so they may appear as alternatives. Modulations, detuned recordings, percussion and sparse harmony can make the result uncertain. Confirm the key by playing its root against the song and listening for a sense of rest.
Is the result always correct?
No. Key detection is an estimate, especially when a song changes key or uses modes. Use the suggested alternatives and confirm the result by ear.
Is it really free?
Yes. Use this tool without an account, subscription or download. Audio files and microphone input stay on your device. Browser format support varies; MP3 and WAV are good starting points.