This page will require the use of the KEYBOARD diagram.

The distance between any two note's on any instrument is called "the interval". All this stuff started on keyboard instrument's hundred's of years ago, I don't know exactly which one, harpsichord, clavichord or maybe it was the bungee-chord.

Looking at the keyboard diagram you see white key's and group's of black keys. The white keys are called "natural's" and the black keys are called "accidental" note's, named because it was year's after the "natural's" where found that the music- ians of years gone past found that another note could be placed between certain "natural's".

Intervals are called by two different names.

The half-step interval, and the whole- step interval.

An example of the half-step interval would be the distance from one white key(natural) to the nearest black key(accidental) that touches the white, or natural key.

This is not in terms of physical distance but in relation to sound.

The whole-step interval is made up of two half-step intervals. And example would be the distance between any two white keys(natural) separated by a black key(accidental).

A whole step is made of two half-steps. Looking again at the keyboard diagram you will notice the "accidentals" are in group's of two's and three's.