Overview

we need to understand basics of pitch in order to read music notation.
if you don't already read music well, you will want to supplement this with practice reading on your instrument.
even if you already read music well, you might find some interesting information here.
concepts of pitch in Western music dates back to ancient Greece.
evolution from seven pitches per octave to twelve took place gradually.
modern system of tuning twelve pitches became established in Europe towards end of Renaissance.
music uses the twelve tones of the chromatic scales in a wide variety of ways.