This essay...
 
...describes the technological method I used to create a working environment for creating music with equal tunings in divisions of the octave other than 12.
 
...makes some general comments on the tuning of thirteen equal tones
 
...presents a partial analysis of my own composition in this tuning, the 13-tone March.
 
...concludes with an aesthetic discussion of the reasons for writing tonal music in such tunings, and the results of the project.
 

The entire text is available as a .pdf here: jcseymour_13tones.pdf. An abridged version was featured at the 2007 ICMC.