Learn about the building blocks of music and the way they produce infinite combinations.
https://continuingstudies.stanford.edu/courses/liberal-arts-and-sciences/a-practical-introduction-to-music-theory-and-harmony/20213_MUS-121-W

A course for music lovers and practitioners offered annually since 2005:
Student evaluations:
http://ichriss.ccarh.org/teaching_evaluations.htm

STAP-eligible. Tuition discounts available:
https://continuingstudies.stanford.edu/registration-policies/tuition-and-payment