The humble but mighty clef. Clef is a name derived from the same French word, which means ‘key’. A clef is a symbol used in music notation to indicate which notes, or pitches ... and only-used G-clef ...

Treble Clef on upper staff ... Another example of 12th century notation. Note the variation of the letter F to the left of each read line. (image: The Schøyen Collection) These initial letters ...