In order to start understanding the very fabrics of music, it is fundamental to be able to interact with one of its most important components: harmony. Every aspect of music is influenced by this musical element.
In order to analyse classical sonatas succesfully, we need to be "fluent" in functional harmony.
Juan Rezzuto has released a new article with some tips on the most ussualy found harmony elements in classical piano sonatas. Yoiu can take a look at