Create commons books at Connexions, with an excellent one of music theory; I was impressed as the book started not with the expected (this is a musical stave, with the notes) but with what a standing wave was, and worked from there.
Create commons books at Connexions, with an excellent one of music theory; I was impressed as the book started not with the expected (this is a musical stave, with the notes) but with what a standing wave was, and worked from there.