Notes on the staff

The staff comprises usually five lines. Small ledger lines above or below the staff are also used when necessary.

In the beginning of the staff is a clef. 

In the example below is four clefs: Treble clef (G-clef), alto clef, tenor clef and bass clef (F-clef). The use of different clefs makes it possible to write music for all instruments and voices, regardless of differences in note range (without too much ledger lines).