Chord Detector

Major, minor, diminished, augmented, dominant 7th, major 7th, minor 7th, and suspended chords. The detector analyzes harmonic content frame-by-frame and matches against chord templates. Complex jazz voicings or extended chords (9ths, 11ths, 13ths) are simplified to the nearest recognized chord type.

The audio is transformed into a chromagram — a representation showing the energy of each pitch class (C, C#, D...) over time. A matching algorithm compares each time frame's pitch profile against known chord templates to find the best fit. A bass filter removes kick drum interference below 130 Hz that would otherwise distort the chroma analysis.

Yes. Results display as a time-stamped chord progression showing exactly when each chord begins. You can click any chord in the timeline to hear that section of the audio.

Best results come from isolated instruments (piano, guitar) or sparse arrangements. On dense full mixes, accuracy decreases as overlapping instruments create ambiguous pitch content. For best results on a full mix, run it through the Stem Splitter first and analyze the instrumental stem.

The chord progression implies a key, but for explicit key detection use the Key Finder tool. Cross-referencing both gives you the full harmonic picture — what key the song is in, and what degree (I, IV, V, vi) each chord represents.

No. All processing runs on your device. The chromagram analysis and chord matching happen locally — nothing is sent to a server.