Harmonic analysis of MIDI files using Python and Prolog.

The python scripts invoke prolog rules with a list of (note, function) pairs. Notes and functions are each initialized to a unique prolog variable.

A massive prolog query is constructed from combining the queries for each sample.

A single sample query:

analysis([[[c, N0], [e, N1]],
          [[c, N0], [g, N2]]]).

Or in general:

analysis(sample).

sample is a [frame].

frame is a [[note, function_var]].

function_var will either be a chord with root, quality, and function or an NHT (non-harmonic tone) with note and type.

TODO: Handle NHTs more robustly: an ideal solution would minimize their use without inhibiting analysis accuracy or performance.