G, D,A, E, B, F /G ...) and one circle of fifths for minor keys (...f , c , g , d /e , b ,
f, c, g, d, a, e, b, f ...). These wrap diagonally around the torus such that each major key
is located near both its relative minor (e.g. C major and A minor) and its parallel minor
(e.g. C major and C minor). (See Figures 7.1 and 7.2.)
98
ABFigure 7.1(A) Distributed mapping of tonality on the SOM for probe tone judgements for the nine-chord
sequence modulating from C major to D minor. The top rowshows the results for chords 1, 2, and 3 (left to right),
the second rowfor 4, 5, and 6 (left to right), and the bottom rowfor chords 7, 8, and 9 (left to right). (B) Distributed
mapping of model 1 for the same sequence.