5 Levels of Jazz Guitar: Cecil Alexander's Roadmap for Blues and Rock Players

From Blues Boxes to Bebop Lines

Most guitarists who fall in love with jazz did not start there. Cecil Alexander, an elite jazz guitarist and Berklee faculty member, grew up on Hendrix and Eddie Van Halen. His father played George Benson and Wes Montgomery records around the house, but for years that was just parent music. Everything changed when a teacher at a Berklee five week summer program handed him a listening list built around his actual taste.

Hearing Grant Green on It Ain't Necessarily So, some of those tunes with Sonny Clark and Art Blakey, it sounds like Angus Young but with a bebop tinge to it.

That is the key insight behind this entire masterclass. Jazz does not have to be learned from the outside in. If you already have blues and rock vocabulary under your fingers, you have a foundation. Here is Cecil's five level roadmap for building on it.

Level 1: Escape the Pentatonic Box

Start with what you already know: the minor pentatonic scale. Then add color tones very deliberately, one at a time.

• Add the 9th. In D minor pentatonic, find the 2nd degree of the scale inside your existing shape. Locate it in every octave.
• Add the natural 6th. This is extremely common in jazz over minor chords.
• Congratulations, you are playing Dorian. The 9th plus the natural 6th added to minor pentatonic gives you the Dorian mode.

Cecil recommends practicing this over a modal tune where the harmonic rhythm is slow enough to actually hear what you are doing. So What and Impressions are perfect: half the tune is D minor, then it moves up a half step to E flat minor. Compare that to a standard where you get one or two chords per bar and there is far less time to think.

The critical mindset shift at this level is hearing individual note weights rather than a block of scale. The 9th has its own flavor. The natural 6th has its own flavor. Cecil recommends anchoring everything to chord shapes and voicings.

Even when I was running through this box, I was thinking about the D minor 7 chord shape. Within that shape you have the root, the 5th, the flat 7 and the flat 3. Then you use those as landmarks to get to the tensions. The 9th is a half step below the flat 3. The natural 6th is a whole step above the 5th.

Level 2: The Arpeggio Roadmap

Arpeggios are the natural next step because they connect directly to the chord shapes you already visualize. Cecil's approach:

• Learn each arpeggio in two or three octaves, not just one position
• Sing them so they live in your ear, not just your hands
• Improvise through progressions by outlining each chord: over a 2-5-1 in C, that is D minor 7, G7, C major 7
• Restrict yourself to five or six frets. One of Cecil's early teachers assigned this specifically to stop the habit of leaping up and down the neck every time the chord changes

That last point solves a problem almost every intermediate player has. You get comfortable with E and A string root shapes, so you jump position on every chord instead of finding the arpeggio that is already under your hand.

Upper Structure Arpeggios (3 to 9)

Here is where things open up. Instead of memorizing dozens of new shapes, play arpeggios you already know starting from the 3rd, 5th or 7th of the chord. Over a D7, playing an F sharp minor 7 flat 5 arpeggio (starting on the 3rd) gives you 3, 5, flat 7 and 9. Same shape, new color.

Cecil maps this out over static chords first, all rooted on G:

• Major 7: G major 7 from the root, B minor 7 from the 3rd. D major 7 from the 5th gives you a sharp 11, which is a special case to use sparingly.
• Minor 7: G minor 7 from the root, B flat major 7 from the flat 3rd, D minor 7 from the 5th (giving you the 9th and 11th), F major 7 from the flat 7th (which brings in the natural 13, great on a modal tune but weakening on a 2-5-1).
• Dominant 7: G7, B minor 7 flat 5, D minor 7 and F major 7 are all used interchangeably in bebop.
• Minor 7 flat 5: approach with care because of the flat 9 clashes.

The Avoid Note Rule

An avoid note is a note a half step above a chord tone, which creates a harsh flat 9 interval. Most players know the 4th over a major chord as the classic avoid note. Cecil points out something less obvious: on a major 7 chord, the root itself is an avoid note when it sits a half step above the major 7 in a voicing. That is why so much jazz vocabulary hovers around the 6th and 7th rather than resting on the root.

Avoid notes are not forbidden. They are leaning notes. Play them and resolve by half step to the nearest chord tone, or move through them fast enough in an eighth note line that no one notices.

Level 3: Pivot Arpeggios and Rhythmic Variation

A pivot arpeggio (associated with Barry Harris and David Baker, and heard constantly in Bud Powell and Charlie Parker solos) reverses the shape. Take D, F, A, C, keep the root where it is, and drop the remaining three notes down an octave.

The origin story is worth knowing: horn players developed this to keep pace with pianists who could run arpeggios up forever. Horns ran out of range, so they inverted the direction while keeping the forward motion.

Apply pivots to every chord quality and to every upper structure arpeggio. Then add variations:

• Insert a chromatic note a half step below the second note of the arpeggio, then run the remaining three notes up as a triplet. Charlie Christian used this shape constantly.
• Practice each version in multiple positions on the neck, horizontally and vertically.

Tune assignment: jazz blues in B flat. Note the difference from a standard blues: 2-5s set up the IV chord (F minor 7 to B flat 7), the turnaround uses a 3-6-2-5 (D minor 7, G7, C minor 7, F7) rather than the usual IV to V move.

Level 4: Chromaticism, Enclosures and Bebop Scales

There are two core chromatic devices in jazz.

• Chromatic approach: hit a target note from a half step above or below.
• Enclosure: approach the target from both directions. Half step below then half step above, or a whole step above then half step below, and so on.

Cecil's advice is to categorize enclosures as small pieces of vocabulary rather than as abstract options. Some are theoretically valid but rarely heard. Others (like an extended chromatic enclosure starting three frets below the target and sliding up) show up constantly in long bebop phrases. He has one he lifted from Sonny Rollins: start a half step below the target, trill between the half step and whole step above, come back below, then resolve.

Bebop Scales

Adding a passing tone in the right place ensures chord tones land on strong beats (1, 2, 3 and 4), which makes your lines harmonically clear to a listener. Three scales Cecil sees repeatedly in transcriptions:

• Bebop dominant: Mixolydian plus a natural 7 as a passing tone
• Bebop major: major scale plus a flat 6 (or sharp 5), giving a strong major 6 sound
• Phrygian dominant bebop: for very altered dominants, containing the flat 9 and flat 13

He also loves that bebop dominant vocabulary covers two chords at once. Seeing a 2-5, he often just thinks of the V chord, which speeds up decision making in real time.

The George Benson Picking Technique

Cecil is one of very few players using a reverse pick angle with an anchored hand. About nine years ago he switched to what is commonly called the George Benson picking style: reverse angle, free palm, with the pinky and ring finger anchored on the body.

He previously played with a forward angle and palm resting on the bridge, closer to a bluegrass approach. That gave a lighter, more precise, warmer tone with less harmonic ring, but it did not give him the articulation he wanted.

I didn't feel like I was able to accent hard enough because my palm was not floating. Also in terms of speed, I felt a lot of tension trying to play fast that way. With this style I felt more comfortable immediately.

He also uses rest strokes. On a downstroke the pick comes to rest on the next lower string. The upstroke escapes freely, like a rebound. The natural barrier gives you a consistent reference for how much energy each stroke needs, and it fattens the tone compared to a free stroke.

Most importantly, Cecil does not think in terms of strict alternate or economy picking. He thinks about where the peak of the phrase should be, and picks whatever gets him there, sometimes two or three downstrokes in a row.

I practice accenting specific notes to the point where the ghost notes almost disappear. You just hear those hits in the phrase, like a drummer on the snare.

Level 5: Altered Scales, Substitutions and Side Slipping

The Altered Scale

The altered scale is the 7th mode of melodic minor. Every note except the root is altered: flat 9, sharp 9, flat 5, sharp 5, flat 7. Its great advantage is that melodic minor contains no avoid notes.

Cecil's practical trick: rather than visualizing the altered scale shape, think of playing melodic minor a half step above the dominant root. Over G7, play A flat melodic minor. Starting from A flat naturally emphasizes the flat 9, sharp 9 and flat 13, which is exactly the sound you hear on records. He applies this stacking idea broadly. Over a static D minor 7, he often thinks G7 to bring out the 11th, or F7 for a Phrygian color.

Tritone Substitution

The 3rd and flat 7th of G7 (B natural and F) are also the flat 7th and 3rd of D flat 7. Because the two chords share that tritone, they are interchangeable. So over a G7 in a 2-5-1 in C, play all your D flat 7 vocabulary. The natural 4th of D flat becomes the major 7 against G7, which is a strong dissonance, so keep moving through it.

Side Slipping

This is intuitive on guitar and awkward on horns and piano. Take a phrase or an entire progression and play it a half step above or below where the band is. If a 2-5 lasts several bars, play a bar of E flat minor 7 to A flat 7 before landing on D minor 7 to G7.

Coltrane and McCoy Tyner did this constantly on modal vehicles like Impressions, playing harmony a half step above and below the D the rhythm section is holding. Cecil says the hard part is not the vocabulary, it is having the conviction to sit inside the dissonance and follow through to a strong resolution point.

Thirds Substitutions

From D minor 7, move to chords a minor or major third away: F, A flat and B for minor thirds; F sharp and B flat for major thirds. There is no unified theory behind it, it just sounds great. Practice moving between D minor 7 and one target at a time over a drone, starting simple and then adding chromaticism. Even mapping pentatonic shapes (D minor pentatonic to F minor pentatonic) with attention to voice leading gets your ear used to where these lines want to land.

Your Practice Roadmap

• Level 1: So What or Impressions. Add the 9th and natural 6th to minor pentatonic across the neck.
• Level 2: Autumn Leaves (mostly diatonic with a couple of secondary dominants). Outline arpeggios within a five fret range.
• Level 3: Jazz blues in B flat. Pivot arpeggios through every change, from the root, then the 3rd, 5th and 7th.
• Level 4: Solar. Cyclical 2-5s through multiple keys, ideal for bebop scale and enclosure practice.
• Level 5: Impressions for space to explore substitutions, and Donna Lee for classic bebop and altered vocabulary.

A closing note on process. Jazz education suffers from a curse of options. Cecil's antidote is to commit to one device at a time. If he wants to internalize the 3 to 9 sound, he plays a whole tune using only that idea over as many chords as possible, then surrounds it with vocabulary that is already second nature so the new thing sounds like the rest of his playing rather than an exercise.

Ready to Find Your Level

If you have been playing for years and feel stuck without knowing why, book a free Sonora Guitar Skills Assessment. It is a one on one session with a Sonora instructor, and in about 50 minutes you get an 18 point diagnostic of your playing, a written report identifying the two or three things holding you back, and a 30 day practice plan.