Crescendo and diminution symbols are commonly used intensity symbols, which are used to represent the process of increasing or decreasing the volume respectively. The crescendo symbol consists of two lines of equal length, connected at their left ends and gradually opening out at their right ends. This symbol begins with a note using the crescendo symbol, with the open end drawn to where the composer wanted the effect to stop. The crescendo symbol is drawn exactly the opposite of the crescendo symbol, with the intersection on the right and the opening on the left.

Generally, for example:

The fade-out symbol is gt;

The crescendo symbol is lt;

Sometimes, in this case There are also static strength symbols identified at both ends of the symbol (for example, pppgt; fff)