Acoustica
Cherry Audio

Detect Chords from Notes

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DETECT CHORDS FROM NOTES

Already have MIDI parts and want chord labels for them? Detect Chords from Notes (default hotkey Ctrl+Alt+C) analyzes the MIDI notes in your selected clips and creates chord blobs on the chord lane automatically. The onset-aware, duration-weighted algorithm handles block chords, arpeggios, and even non-overlapping note patterns.

RUNNING DETECTION

The command is available from:

  • The piano roll right-click menu

  • The clip right-click context menu

  • The MIDI Editing submenu

  • The Ctrl+Alt+C hotkey, on all selected MIDI clips at once

Detected chords are created as detached reference blobs — labels that describe your music without altering the original notes.

DETECTION OPTIONS

An options dialog appears before detection runs:

  • Min Chord Length — the shortest chord the detector will report.

  • Note Filter (0–80%) — filters out short passing notes.

  • Certainty (20–90%) — how confident the detector must be before labeling a beat.

  • Minimum Notes (3–6) — how many distinct pitches are required to call something a chord.

  • Include other clips — supplements unresolved beats using notes from other MIDI clips at the same timeline position, useful when the harmony is spread across tracks (bass on one track, keys on another).

  • Delete existing detected chords — clears previous detection results first.

Your settings persist in preferences for repeat runs. Detection is smart about voicings — a passage that ends on an inverted chord keeps that final chord, labeled as a slash chord.