PPM-Decay: A computational model of auditory prediction with memory decay
Fig 3
Sample chord sequences analyzed in Experiment 2.
A) represents the popular music corpus (‘Night Moves’, by Bob Seger), B) represents the jazz corpus (‘Thanks for the Memory’, by Leo Robin), and C) represents the Bach chorale harmonization corpus (‘Mit Fried und Freud ich fahr dahin’, by J. S. Bach). Each chord is labeled by its integer encoding within the chord alphabet for the respective corpus. Each chord sequence corresponds to the first eight chords of the first composition in the downsampled corpus. Each chord is defined by a combination of a bass pitch class (lower stave) and a collection of non-bass pitch classes (upper stave). For visualization purposes, bass pitch classes are assigned to the octave below middle C, and non-bass pitch classes to the octave above middle C.