This is an introduction to the free online software (javascript app) from mDecks: mCircle located at http://www.mdecks.com/graphs/mcircle.php mCircle was created by Ariel J Ramos using his Decoding the Circle of Vths (fifths) method to analyze and study musical structures and subsets using a graphical approach. In this introduction we will use mCircle to find the answer... Continue Reading →