s.mart Key Identifier
⭐Determines the key for a song or a chord progression
⭐Determines the key also for an arbitrary set of chords or notes
▫ The set of chords can be entered as text or picked from the chord dictionary
▫ The notes can be entered either on the fretboard or on the piano
▫ If the key cannot be determined unambiguously, the Key Identifier shows you
◾ which keys are possible
◾ which notes are missing
◾ which notes do not belong to the key