Grammar of Music: theory you can hear

Field notes

The site organizes theory through an encyclopaedia, glossary, analyses, timeline, articles, and a separate toolset. Its distinctive interaction model is audible notation: the homepage says symbols can be clicked and heard, while listed tools include a chord dictionary, transposer, harmonic field, circle of fifths, and progression analyser. The learning section states that it includes courses, exercises, a mastery map, and tutoring for topics a learner has not mastered.