A tie is used to join two adjacent notes of the same pitch. "Same pitch" means that neither note may be higher or lower than the other. In this case the tied notes become one continuous sound, and their durations are added together, as shown in Figure 27:
sounds the same as
Note that the tie is written on the outside, and it must extend from the notehead of the first note to the notehead of the other note, as shown in Figure 28. No matter how many notes there are, we can use this method to join them together, as long as they are adjacent and share the same pitch.
A dot after a note extends the note's duration by half, as shown in Figure 29. When a note is in a space, the dot is written in the same space. But if the note is on a line, the dot is generally written in the space above the line:
There are two ways to extend a note: by using a tie or by using a dot. As shown in Figure 30:
There is one major difference between these two methods: a tie can cross over two bars, but a dot cannot.