How to Use Volume in Your Piano Playing
Volume is perhaps the most easily recognized and executed technique in bringing your piano playing to life. Varying degrees of volume give your piano music a different dynamic. And that’s exactly what volume levels are called in music: dynamics.
As with TVs, car stereos, and crying babies, the world of volume has a wide range: from very soft to very loud. Composers are quick to realize this and tell performers exactly where to play in the volume spectrum. Of course, to make things a bit fancier, all dynamics in music are Italian words.
Starting with basic volume changes
When you talk about volume, you say something is loud or soft. From there you can explain how loud or how soft. Music uses the same principle: You start with two little Italian words, piano (soft) and forte (loud), to describe the volume of notes. Abbreviations for these words are now the norm. You see soft and loud marked simply as p and f, written in fancy, stylized fonts.
When you see a dynamic marking, whatever the requested volume may be, you continue to play at this volume level until you see a new dynamic marking.
Widening the range
If soft and loud were the only volume levels available, home stereos would just have two volume buttons, not a turning knob. But, in real life, you have a variety of volume levels. Rather than keep track of some more highly descriptive but multi-syllable Italian words, you need only remember one abbreviation for the in-between volumes: m, which stands for mezzo (medium). Place this word before piano or forte, and you get two more shades of volume.
For extreme volumes like “very soft” and “insanely loud,” just throw a few more p’s or f’s together. The more you have, the more you play. That is, pp means “very soft” (no jokes, please). The written word isn’t piano-piano, however. Instead, you use the Italian suffix -issimo, loosely translated as “very,” and you end up with pianissimo. The symbol ff would be “very loud,” or fortissimo.
The whole range of volume abbreviations is shown here:

Making gradual shifts in volume
Two dynamic symbols that you encounter quite often are those that tell you to gradually play louder — a crescendo (cresc.) — or to gradually play softer — a diminuendo (dim.). Thinking of the symbols as bird beaks can help you remember which is which: A bird gets louder as it opens its beak; softer as it closes its beak:

Gradual volume chances with crescendo and diminuendo.
You can also think of crescendo and diminuendo as the opposite of the math symbols: The arrow points to the softer, smaller sound.
Whether they appear as words, abbreviations, or symbols, these instructions are almost always preceded and followed by dynamic markings that tell you to play from volume A gradually to volume B. Maybe the composer wants you to gradually go from very soft (pp) to very loud (ff), or perhaps the music indicates a subtle change from mezzo piano (mp) to mezzo forte (mf). Whatever the case, it’s up to you to decide exactly how to play these volume changes.

Piano Glossary
accidental
A sharp or flat not in the key signature.

Piano Glossary
bar line
A line that divides music into measures, breaking up the musical paragraph into smaller, measurable groups of notes and rests.

Piano Glossary
bass clef
A musical symbol that indicates lower the notes, generally played with the left hand.

Piano Glossary
beat
The steady pulse of a piece of music; what you tap your foot to.

Piano Glossary
C position
Placing your right-hand thumb on middle C and your other right-hand fingers on the four successive white keys.

Piano Glossary
chord
Three or more notes played at the same time.

Piano Glossary
Circle of Fifths
An order that starts with no sharps and flats and cycles the ring of keys to all 12 keys.

Piano Glossary
clef
A musical symbol that tells you the names of the lines and spaces on the staff.

Piano Glossary
fingerings
Numbers written above the notes that tell you which finger to use for each note.

Piano Glossary
G position
Placing your right hand on the G above middle C and your other right-hand fingers on the four successive white keys.

Piano Glossary
grand piano
The largest piano. A concert grand is 9 feet long; a baby grand is about 5 feet.

Piano Glossary
grand staff
The treble clef and bass clef joined together with a brace at the start of the left side.

Piano Glossary
home note
The base note of a piece of music. All the notes in a song have a relation to the home note based on how close or far they are to home.

Piano Glossary
interval
The distance between any two musical notes.

Piano Glossary
key
A set of notes that corresponds to a certain scale.

Piano Glossary
key signature
Notation placed just after the clef on every line of music to tell the performer what key the song is in.

Piano Glossary
ledger line
An imaginary line running above or below the staff, extending the five-line staff to represent notes above and below the staff.

Piano Glossary
measure or bar
A batch of notes with a specific number of beats — most commonly four beats — that helps a performer keep time.

Piano Glossary
middle C
The 40th key of a piano, close to the center of the keyboard. The first key a new pianist learns the placement of.

Piano Glossary
MIDI Musical Instrument Digital Interface
A device that allows communication between electronic, digital equipment.

Piano Glossary
notehead
The printed representation of a note. A notehead is oval and may be solid or open, an attached to a stem or not.

Piano Glossary
octave line or ottava line
The line that tells you to play the indicated note or notes an octave higher or lower than written.

Piano Glossary
root note
The lowest note of a chord.

Piano Glossary
scale
A series of notes in a specific, consecutive order.

Piano Glossary
staff
The five lines and four spaces music is written on.

Piano Glossary
tempo
How fast or slow the beat is.

Piano Glossary
time signature
The indication of the meter of a piece of music.

Piano Glossary
tonic
The bottom note of a scale.

Piano Glossary
treble clef
A musical symbol that indicates higher the notes, generally played with the right hand.

Piano Glossary
triplet
Three notes per beat.

Piano Glossary
upright piano
A piano that sits upright against a wall. Also called verticals, they vary in height from the spinet up to full-size uprights.