Guitar Theory Numbers & Intervals On the Fretboard

Guitarists play and use intervals for melody, harmony, riffs, lead guitar solos, and bass lines. Understanding how intervals are played on the fretboard is an important part of learning about guitar theory, understanding music and popular songs. In this free guitar lesson you'll be introduced to what intervals are, how they're numbered, which intervals are commonly used, and what songs make good examples of using intervals such as thirds, fourths, fifths, sixths and sevenths. This music theory instruction is based on the book Fretboard Theory Chapter 9 Intervals by Desi Serna.

Musical Steps
You can express the distance between notes in terms of frets, steps, or intervals. Frets is an acceptable term to use when dealing with other guitarists. Steps is a general music theory term used and understood by all musicians. But thinking of the distance between notes as intervals is the most concise and universal way. This allows you to think of the distance as an independent unit of measure rather than a series of frets or steps.

Major Scale Interval Theory
The major scale is used to measure the distance between notes. For example, the distance between the first and second notes of the major scale is two frets, one whole-step or a “second” interval. The distance between the first and third notes of the major scale is four frets, two whole-steps or a “third” interval. There are seven notes in the major scale and thus seven intervals. An eighth term, octave, refers to a higher or lower occurrence of the same note.

Playing in Thirds
Guitar players map out interval shapes on the fretboard, then use these note combinations to play musical parts. For example, you can try playing entirely through a major scale pattern and adding a third interval to each note. In other words, play through the major scale two notes at a time with the second note always a third a head. In order to do this correctly you need to ONLY use notes from the major scale you're playing in. As a result, some third intervlas are major while others are minor. Playing in this manner is one way to harmonize the major scale (and is similar to how guitar players learn chord progressions and playing by numbers)

The famous guitar intro to "Brown Eyed Girl" by Van Morrison is a great song example of playing a major scale melody harmonized in thirds. “Walk on the Wild Side” by Lou Reed is a song that uses this same technique on the bass guitar. Many other famous songs have prominent guitar intros, riffs or solos that use third intervals.

Third Interval Songs
“Brown Eyed Girl” Van Morrison
“Blackbird” The Beatles
“Two Step” Dave Matthews Band
“Tripping Billies” Dave Matthews Band
“Lover Lay Down” Dave Matthews Band
“Grey Street” Dave Matthews Band
“Rhiannon” Fleetwood Mac
“La Bamba” Los Lobos
“Peace Train” Cat Stevens
“Wanted Dead or Alive” Bon Jovi
“Heaven” Los Lonely Boys
“Patience” Guns and Roses
“Your Body is a Wonderland” John Mayer
“Have You Ever Really Loved a Woman?” Bryan Adams
“Scar Tissue” Red Hot Chili Peppers
“Walk on the Wild Side” Lou Reed

Power Chord Fifth Intervals
Playing in fifths is another way to harmonize the major scale using intervals. Fifth intervals are simply power chords. Full chords consist of a root, third and fifth interval, so power chords are theoretically not chords in the music world. They're intervals. In fact, they are the most common type of interval played on the guitar. Any time you use power chords you're playing "in fifths." The guitar riff in "Iron Man" by Black Sabbath is just one example of many that use power chords, or fifth intervals (songs can begin at any major scale degree or mode). Fifth intervals can also be inverted by putting the root above the fifth. This is heard in the intro to "Smoke On the Water" by Deep Purple. (Some players mistake these shapes for fourths.)

Fourth, Sixth, Seventh and Octave Intervals
Other intervals can be worked out on the guitar also. Just play through a major scale two notes at a time with the second note a certain distance ahead. Be sure to only use notes found in the scale you're using. Once you get interval shapes mapped out on the fretboard, try moving them into different octaves and positions on the guitar neck or transposing them to new keys.

Intervals and Guitar Music Theory
Understanding how intervals are played and used in popular songs is critical to developing a solid knowledge of music theory. The harmony that intervals create are not just used in guitar riffs and solos but parts played on other instruments as well including voices. Singing in harmony is no different than playing in thirds or fifths, etc. In fact, many singers will work out a vocal harmony part on an instrument first in order to teach themselves how to sing the intervals correctly. Smart players use guitar theory and intervals to help them in all aspects of their musicianship.

Play Until Yer Fingers Bleed!
Mr. Desi Serna (Google Me!)
http://www.Guitar-Music-Theory.com
Pentatonic/CAGED/Progressions/Modes

The Theory Behind Guitar Chord Progressions and Playing By Numbers

Understanding chord progressions is essential to learning guitar music theory and becoming a good player. Recognizing chord movement and playing by numbers can help you to:

• Chart, learn and remember songs better
• Apply scales correctly
• Play by ear
• Compose and improvise your own music
• Understand guitar theory and apply it to the fretboard

Major Scale Triads
If you're already familiar with major scale patterns and basic guitar theory, then you can begin to understand guitar chord progressions. The major scale has seven notes and each one can be played as a chord. To build guitar chords, each note is combined with notes three and five degrees ahead in the scale. For this reason, these intervals are called root, third and fifth (or 1 3 5). Combined, the three chord tones are called a "triad".

Root, Third and Fifth Intervals (1 3rd 5th)
When you apply this chord building concept to an entire major scale not all chords end up the same. For example, some chords have major thirds (two whole-steps or four frets above the root) while others have minor thirds (one and a half-steps or three frets above the root). This occurs because the distance between major scale tones varies (some notes are a whole-step apart while others are a half-step apart). Coincidentally, the fifth intervals are all the same with the only exception being the chord built on the very last scale tone.

Nashville Number System
This order of major and minor creates the following chord sequence: 1. major 2. minor 3. minor 4. major 5. major 6. minor 7. minor (flat 5). Sometimes referred to as the "Nashville Number System," this sequence is the foundation of music theory and is often represented by Roman numerals. Major chords are written in upper case and minor chords are written in lower case as follows: I ii iii IV V vi vii

Keys and Chord Patterns
Different keys have different chords built from different notes determined by different key signatures (sharps and flats). What makes the chord number system so useful, and a must for any serious guitar theory student, is that it remains the same regardless of key. For example, the first three chords in G major are G, Am and Bm, the first three chords in A major are A, Bm and C#m, the first three chords in C major are C, Dm and Em, but in all keys the first chord is major, the second is minor and so is the third. The number system can be visualized on the guitar as a chord pattern so that you don't have to be concerned with key signatures and notes. Move this pattern around the neck and you'll instantly be able to see all the chords for each key. Guitar players have a music theory advantage because of this ability to shift patterns on the fret board.

Learn New Songs
Playing chord progressions and playing by numbers go hand in hand and the concept is easier on the guitar than most other instruments. You just have to know the right way to map things out on the guitar neck. You'll be surprised to realize that many songs that appear to be quite different because of their position on the neck and chords used, are actually the same progression in terms of numbers and theory. No more cluttering your mind with endless amounts of chord information because you'll be able to recognize simplify things with numbers. Can you imagine how much quicker you'll be able to learn and remember new songs?

Learn and Understand Guitar Music Theory
Charting chord progressions has more benefits than just playing songs. Progressions play a role in understanding guitar music theory including applying pentatonic and major scale patterns correctly, identifying modes and modal scales, using intervals and adding chord extensions.

Play By Ear
How do some players know what's coming next the first time through a song? Easy, knowing where to look is half the battle! When you can see clearly all the chords of a key, it's easier to guess the change or even anticipate the movement before it happens. Since many songs are based on typical progressions, you'll become very familiar with common changes. You've probably heard musicians calling out numbers on the bandstand, right? Now you can know what they mean and experience the benefits of the system for yourself. Not to mention, you can sit around and talk theory with real musicians without feeling like an idiot.

Improvise Compose Your Own Music
Establishing keys, determining chord movement, applying scales and playing by ear are all necessary for jamming and song-writing. Don't leave spontaneity to chance, work out the technical details first and then you'll improvise and compose much better.

Play Until Yer Fingers Bleed!
Mr. Desi Serna (Google me!)
http://www.Guitar-Music-Theory.com
Scales, Chords, Progressions, Modes and More