While I suppose there are tools (as in software) to support learning music theory; and I’ve seen a few pop up here periodically, I would recommend a graded cour

While I suppose there are tools (as in software) to support learning music theory; and I’ve seen a few pop up here periodically, I would recommend a graded course in theory. The RCM (Royal Conservatory of Music) course used here in Canada is excellent. The books and adjacent materials are widely available. It starts with very rudimentary concepts but by the upper levels ~ 9-10 gets into more advanced harmony and analysis. I’m a professional collaborative pianist and do some teaching and coaching. There are comments about artist x, y or z not being able to read music, let alone understand theory. True? Plausible, but in some fields of music it’s not optional. There’s evidence that pianists with better theory knowledge are more accurate sight readers. Why? Because it provides information on probabilities about what _should_ come next. In any case, when I’ve taught theory at this level, I’ve used the RCM materials.