The Trill

The trill is usually written under one of these three forms :

However all three the signs mean exactly the same.

Rules for the trill:

• All trills begin on the upper note
• A trill is composed of a minimum of 4 notes

Apart from these two rules the trill may be interpreted freely by the performer. 

A trill written like this :

can be interpreted for example as:

Trill1

Trill 2

Trill 3

Trill 4

Trill 5

Trill 6