Music Theory Reference

Note names

In most Western countries the notes are given a letter of the alphabet according to their pitch. From the lowest pitch to the highest pitch: A, B, C, D, E, F, G. And then the pattern repeats, so that A comes after G:

Piano keys with note names (A to C)

Music theory is easier to explain with a piano since there is always only one way to play a note:

Note C on piano

On the contrary, there are almost always multiple ways to play a note on a guitar:

Note C on a fretboard