Automatic tonal analysis of musical scores

A non-transitory computer-readable medium, comprising:

• computer code for implementing a tonal analysis method, the method comprising the steps of:
• parsing notes of a musical score to generate a time-ordered plurality of sonorities, each sonority having a chord comprising a subset of notes of the musical score based on time value;
• confirming a plurality of tonal centers each having a tone, each by testing a pair of sonorities among the plurality of sonorities;
• accounting a chord of a sonority for a confirmed tonal center to determine whether the chord of the sonority is a functional symbol of the confirmed tonal center;
• and
• identifying a tonally stable region of the musical score for a confirmed tonal center, wherein the chord of each sonority in a tonally stable region is accounted as a functional symbol of that tonal center;
• and
• a note data record representing a note of the musical score stored as an element of a voice data structure;
• a voice data structure stored as an element of a parts data structure;
• a sonority data structure representing a sonority, containing references to each of a subset of note data records of the plurality of note data records, and associated with a theory line entry data structure wherein the accounting of each sonority as a functional symbol of a confirmed tonal center is stored.