Tremolo
Trembling sound effect / From Wikipedia, the free encyclopedia
For other uses, see Tremolo (disambiguation).
In music, tremolo (Italian pronunciation: [ˈtrɛːmolo]), or tremolando ([tremoˈlando]), is a trembling effect. There are multiple types of tremolo: a rapid repetition of a note, an alternation between two different notes, or a variation in volume.
![Thumb image](http://upload.wikimedia.org/wikipedia/commons/thumb/8/8a/Tremolo_notation.svg/260px-Tremolo_notation.svg.png)
Tremolos may be either measured, in which the exact rate of repetition or oscillation is specified, or unmeasured, in which it is not (the understanding being in that case that it should be performed as rapidly as possible).