Ornaments are extra notes which decorate the music.
You will learn about some ornaments, such as trill and grace notes, in your Understanding music work.
A trill is rapidly moving between the written note and the one above.
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Withouttrill
Withtrill
A grace note is played really quickly before the main note.
Grace notes on a piano
Grace notes on a violin playing 'Auld Lang Syne'