To all teachers and students:
Here's a new youtube clip on how to use mCircle in two steps.
mCircle is of course a free online resource and it does not require any subscription or sign in.



The tool finds all substructures contained in a main structure (for advanced players only) such as upper structure triads often use in improvisation and chord voicings.
mCircle http://mdecks.com/graphs/mcircle.php
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Ariel J Ramos
Musician & Music App Developer
mDecks Music Apps Mapping Tonal Harmony Piano Voicings
arieljramos.com