Scales and keys.

Scales are the foundations for chords and songs, for all things piano.
Think of the scales as the foundation of most music you hear. Whether it’s pop, rock, jazz, classical, or hip-hop, this scale helps shape melodies and harmonies. They are like musical recipes that keep everything sounding familiar and balanced.

Think of music as a language, and scales or keys as its dialects — each with its own character and emotional tone.

• There are two main types of scales: Major (bright, happy) and Minor (dark, sad).
• Every note (including sharps and flats) has both a major and minor scale, totalling 12 of each.
• Each scale contains a different number of sharps and flats.

When composing, musicians choose:

• The key (which scale to use),
• Whether the key is major or minor, depending on the mood of the song they are composing
• Which note of the scale to write it on (different notes have distinctive tones to them. e.g. which affects the tone (e.g. B♭ Major = rich, F♯ Major = bright).

They also consider the instrument’s range and how playable the key is — more sharps/flats often mean greater complexity.

C Major is one of the easiest keys to play — no sharps, no flats. In contrast, C♯ Major, with its seven sharps, can look overwhelming!

A helpful shortcut in music theory is that each major scale shares its key signature with a matching minor scale — they’re known as relative major and relative minor. Think of them as musical siblings:

For example, A Minor is the relative minor of C Major, and you can find it by counting three semitones down from the major note.