Fingering
In woodwind instruments there is normally one basic fingering, each note is a particular combination of fingers. However at more advanced levels different fingerings can be used in order to create different effects.  Beginners’ books may have a fingering chart to show how to get the different notes.  A low F sharp on a descant recorder will be fingered 1 2 3 0 2 3.  This means: fingers 1, 2 and 3 of the left hand and fingers 2 and 3 of the right hand.  The first hole of the right hand position is left open.