The dynamics of music describe its volume, or loudness and softness.

In the above example, there is 1 piano, crescendo, forte, and 2 accents symbols. These symbols indicate how hard or soft we press a key, and therefore, how loud or soft we play the note.
Below are basic dynamics symbols.
| Symbol | Name | Definition |
| p | piano | soft |
| m | mezzo | medium |
| f | forte | loud |
| sfz | sforzando | very loud followed immediately by very soft |
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crescendo | gradually louder (Remember the symbols for greater than and less than? As the distance between the lines gets wider, the music is played louder.) |
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diminuendo or decrescendo | gradually softer (see above) |
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accent | a stressed note (played louder than the other notes in the same measure) |
| __ | tenuto/stress | a slightly stressed note (played slightly louder than the other notes in the same measure) |
In addition, many combinations of piano, mezzo, and forte can be used.
| Symbol | Name | Definition |
| mf | mezzo forte | medium loud |
| mp | mezzo piano | medium soft |
| pp | pianissimo | very soft |
| ppp | pianississmo | extremely soft |
| ff | fortissimo | very loud |
| fff | fortississimo | extremely loud |
| fp | forte-piano | loud followed by soft |
Although the combinations are infinite, in reality, most songs only have dynamics up to pianississimo and fortississimo. The extreme ffffffff's and ppppppp's are rarely seen and rarely used at all.
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