2.2.1 Music expressions explained ---------------------------------
· Analogy mathematical expressions · Simultaneous music expressions multiple staves · Simultaneous music expressions single staff In LilyPond input files, music is represented by _music expressions_. A single note is a music expression: a4 [image src="" alt="[image of music]" text="image of music" ] Enclosing a note in braces creates a _compound music expression_. Here we have created a compound music expression with two notes: { a4 g4 } [image src="" alt="[image of music]" text="image of music" ] Putting a group of music expressions (e.g. notes) in braces means that they are in sequence (i.e. each one follows the previous one). The result is another music expression: { { a4 g } f4 g } [image src="" alt="[image of music]" text="image of music" ]