The AutoTheory Harmonic Engine enables anyone, regardless of musical theory or keyboard training, to easily create professional-sounding melodies and harmonies.
AutoTheory makes it easy to play in harmony. Simply choose a key and a scale and AutoTheory will map all relevant chords and notes to the keys of your keyboard. Connect it to one or more Reason instruments and it will transform the way you play.
Play full chords with just one finger. Experiment by modifying chords with the chord sliders and modifier keys. Adjust individual chord note voicings and transpose or remove any note to create a customised chord. Create your own scales or select one from the many provided. Use what sounds good to you.
AutoTheory automatically remaps notes to match your chords. Now you can easily improvise melodies that sound good. Maintain your hand in the same position while composing melodies over different keys, scales and chord configurations. Optionally lock specific chord tones to fixed white keys. Four mapping modes accommodate different levels of user experience.
All controls in AutoTheory can be automated for easy transitions anywhere in a song. This means you can change the key or scale in the middle of a song without moving your hands.
AutoTheory also provides a Strum effect that can be used to add drama to any chord. Subtle and extreme timing changes are easily applied and fully CV-controllable.
AutoTheory can control multiple instruments at once. One option sends the root note of chords to a dedicated bass instrument. Four chord and four melody channels provide independent control of velocity and octave for each connected instrument. This allows you to create a rich soundscape – all from a single sequencer lane or just your own hands.
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