In music, a scale is a series of notes played one at a time in ascending and descending fashion. Scale notes make patterns on the fretboard, which guitarists finger and pick position to position. Guitar players use scales to play melodies, riffs, solos, and bass lines.
There are countless types of scales that can be played on guitar, but did you know that popular music is mostly based on just two types of patterns? That’s right. Familiar genres of music like pop, rock, blues, and country use scale patterns based on the pentatonic scale and major scale. Another type of scale, the harmonic minor, is worked into these patterns on occasion. If you want to be successful playing popular styles of music, then you need to focus your attention on these scales.
Famous Guitar Scales
Don’t believe me that these scales are used the majority of the time? Let me prove it to you! Below is a list of famous guitar solos, ones that frequently make “Top Guitar Solos of All Time” lists, and the scales they use.
Pentatonic scale patterns
“Voodoo Child (Slight Return)” (Jimi Hendrix) – Jimi Hendrix Experience
“The Thrill is Gone” (B.B. King) – B.B. King
“Wish You Were Here” (David Gilmour) – Pink Floyd
Major scale patterns
“Smells Like Teen Spirit” (Kurt Cobain) – Nirvana
“Reelin’ in the Years” (Elliot Randall) – Steely Dan
“Light My Fire” (Robby Krieger) – The Doors
Pentatonic and major scale patterns
“Stairway to Heaven” (Jimmy Page) – Led Zeppelin
“Johnny B. Goode” (Chuck Berry) – Chuck Berry
“Cliffs of Dover” (Eric Johnson) – Eric Johnson
Pentatonic and major scale patterns with added harmonic minor
“Sultans of Swing” (Mark Knopfler) – Dire Straits
“Hotel California” (Don Felder, Joe Walsh) – The Eagles
“Sweet Child O’ Mine” (Slash) – Guns N’ Roses
I hope you get my point. Since some of these solos are performed by highly skilled players, you might expect the scales used to be something out of the ordinary, perhaps exotic scales out of an advanced level scale book, but they are not. I would point out that the way in which scale patterns are mixed can get a little tricky, major scale patterns can produce different modal sounds, and players often work in chromatic half-step movement in between scale tones (called passing tones), but the base patterns still remain those of the pentatonic and major scale. In fact, the harmonic minor scale is really just a slightly modified minor scale, one in which a note is temporarily raised to follow a certain type of chord change. In other words, even when players use the harmonic minor scale, they’re still working within the same pentatonic and major scale base patterns. This is why you need to practice pentatonic and major scale patterns and master all the ways in which they are applied.
About Scale Patterns
One thing distinctive to guitar is the availability of unison pitches on the fretboard. In other words, the very same pitch can often be played in more than one location. Typically, a scale has a fixed number of notes, like five or seven, and these notes can be played in more than one position on the neck. Additionally, when scales ascend and descend, their notes can be repeated in higher and lower registers until no further pitches are available. All this to say that the notes of a five or seven tone scale are actually scattered all over the fretboard with multiple occurrences of each note and higher and lower versions of each pitch found everywhere. In order for guitarists to learn the notes of a scale across the neck, they break up the fretboard into sections called positions. The scale notes in each position form a pattern. You rehearse and memorize these scale patterns until all areas of the fretboard have been covered and you can freely use the scale anywhere.
The Pentatonic Scale
Of the two main types of scale patterns that you need to learn, the pentatonic patterns are the simplest and easiest to finger and pick. “Penta” means five, and “tonic” means tone. The pentatonic scale is a five tone, or five note, scale. It produces two types of tonalities, major and minor, with the sound dependent upon how you use it. One version of the pentatonic scale, called the “blues scale,” adds a chromatic passing tone in between two of the scale steps. When learning to cover the neck with this scale, it works well to break the fretboard up into five positions and learn the placement of all the notes by playing through five patterns. There are many great guitar riffs, solos, and bass lines that are based in pentatonic patterns. Listen to sample pentatonic scale songs by clicking on the audio link below
The Major Scale
The major scale features seven notes, which is two more than the pentatonic scale. Like any scale, its notes are scattered all over the fretboard and you need to learn them one position and one pattern at a time. Because of the additional notes, major scale patterns are more complex than pentatonic scale patterns, and they necessitate the use of more fingers. As a result, making your way around the neck with the major scale requires more work. There are also more possibilities when it comes to forming patterns. You usually see the major scale taught as either five or seven patterns. Either way, the patterns are still the major scale. I teach patterns as both a set of five and seven in the Fretboard Theory video instruction featured in the GMT member area.
Any one of the major scale’s seven degrees can be used as the primary pitch in a piece of music. The structure and sound of the scale changes depending on which note is used. This means that major scale patterns are used to play any one of seven types of scales called modes. The two most common modes are named Ionian and Aeolian, which stem from the 1st and 6th degrees, and are better known as the relative major and the relative minor scale.
Major scale patterns are used to play many familiar guitar songs. Listen to the audio track below to hear some examples.
The Harmonic Minor Scale
Another type of scale that occasionally occurs in popular styles of music the is harmonic minor scale. Typically, a piece of music is not solely based in the harmonic minor scale, but rather the music uses the scale temporarily to produce a certain type of harmony. And the harmonic minor is really just a slightly modified minor scale, with one pitch raised to fit with a specific kind of chord change.
When it comes to learning this scale and its patterns, I believe you’re better off making easy adjustments to the minor scale rather than working at covering the whole neck with new harmonic minor scale patterns, although, the latter is an option and can serve a good purpose at some levels of playing.
One variation on the harmonic minor scale that comes up every so often is the melodic minor scale. As for all other types of scales (which I won’t bother mentioning here because I don’t want to confuse you), you rarely, if ever, hear them used in popular styles of music. You start to come across other types of scales as you venture into less familiar and often more complicated genres of music like bebop jazz and neoclassical. That said, guitarists in these genres still rely on the fundamental scales that I have outlined here (namely the pentatonic and major scale patterns), so be sure to have the same groundwork in place before you attempt to play like them.
Writing and Composing with Scales
Learning how to play scales isn’t solely for the purpose of playing lead guitar. Scales are also used to:
- Identify intervals
- Build chords
- Chart progressions
- Play by numbers
- Compose vocal melodies and harmonies
So even if you’re strictly a rhythm guitarist or songwriter, you can still benefit from learning scales. Other instruments, such as keys, horns, and strings, use pentatonic and major scales too, which is of interest to composers who prefer to arrange on guitar.
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