What's new

New in the Tutorials section: Variations.
You can now use MIDI keyboard (Google Chrome is required) to answer interval, scale and chord construction exercises.
20 new progressions in the Harmonic Progression exercise using secondary dominants with inversions.
Contrapunctus XIII and Subjects from The Art of the Fugue by J. S. Bach
New exercise: Augmented and Neapolitan Sixth Chords Identification.
Revision history

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José Rodríguez Alvira.
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Made in the Caribbean island of Puerto Rico.