Essay Part Three by Mark Webster Excellent Essay, also worth checking out are his two other essays Part 1 - Colour is the keyboard and Part 2 - Rhythm in Motion
The Visual Music blog by Maura McDonnell gathers resources of interest to the art of visual music. The blog in particular includes websites that document work, artists, filmmakers, composers, musicians, video artists, exhibitions, call for worlds and events that work with the art and medium of visual and sound. All forms and presentations of visual music and audiovisual composition and performance are considered. This blog contains an extensive archive as it has been active since 2005.