J74 has released Progressive, a new Max for Live tool for chord progression making and harmonic editing.
Progressive works by modeling composition techniques (e.g. diatonic method) and performance styles (arpeggio, humanized timing and dynamics) and is capable of producing extremely realistic chord progressions and arpeggios, directly as MIDI clips in Ableton Live Session view.
Besides the chord progression editor, Progressive also includes tools for scale and chord detection and for MIDI clip harmonization (scale based transposition).
Progressive is a Max for Live device for Live 9 and higher.
J74 Progressive is available here.
Watch here the video introduction and tutorial