# Playing intervals on a guitar

Intervals are the building blocks when playing a guitar. Scales, chords and arpeggios are all assembled with intervals.

## The basics

In music we know these 12 notes:

CCâ™¯DDâ™¯EFFâ™¯GGâ™¯AAâ™¯B
If we would number them, it looks like this:
123456789101112
We will use intervals to understand more about music theory on the guitar

Letâ€™s look at a string on the guitar, for example the first string. Notice that the note on 12th fret is same note as the open string (E). The difference is what we call an octave.

01234567891011121314151617
Congratulations, you have learned about the chromatic scale! The chromatic scale contains all 12 notes. It starts with a root note (which can be any starting note) and then uses all the other ascending notes.

The 6 strings on the guitar are:

• The 1st string is (closest to face)
• The 2nd string is
• The 3rd string is
• The 4th string is
• The 5th string is
• The 6th string is (closest to ground)
Tip: Tune the guitar by ear; Press the red buttons.

## The notes on the guitar

On the illustration below, you see the guitar fretboard with only the "A" highlighted, assuming youâ€™re guitar is tuned E-A-D-G-B-E.

012345678910111213

Select a note, to see the positions on the fretboard above. Notice what changes when you change the note a step up or down.

If you own a guitar, try playing all the A-notes! Notice how the all sound similar even though some are in higher octaves. What is the highest sounding A-note you can find on the instrument?

Now letâ€™s talk about those intervals again. Pretend that "A" is the first number in the sequence of 1 to 12. We call this the key. In the following illustration youâ€™ll see this key-note highlighted.

012345678910111213
You have learned where the notes on the fretboard are and how they relate to the chromatic scale in this tuning.