Reading music with key signatures is what helps us determine what a key a song is written in as well as what notes are always sharp or flat in the piece of music. In this online piano lesson for beginners I show you how to figure out the key of a song through its key signature with help from the circle of fifths and music theory. This piano tutorial shows you easy tips and tricks on how to identify the key signature and the scale of the song. #beginnerpiano #musictheory #pianolessons #onlinepian