Arpeggios Are the Pass Key: Corey Congilio on Unlocking More Interesting Blues Playing

The Problem With Living in the Pentatonic Box

Almost every blues player hits the same wall. You know the minor pentatonic. You know the major pentatonic. You know the blues scale. You can bend, you can vibrato, you can phrase. And yet every solo starts to sound like the last one.

When Corey Congilio sat down with Playback Sessions at Carter Vintage Guitars in Nashville, he offered a fix that has nothing to do with playing outside and everything to do with hearing the changes more clearly. His word for it is the pass key.

What made me sound more interesting to myself was when I just started simply playing arpeggios.

Before we get into the mechanics, it is worth noting the caveat Corey led with, because it is the part most players skip.

First, Respect the Simplicity

Corey was careful not to frame arpeggios as an upgrade over traditional blues vocabulary. They are an addition, not a replacement.

There is so much beauty in the simplicity of what all of our blues heroes did. Stevie Ray Vaughan did not play outside really. Clapton, Hubert Sumlin, Freddie King, they lived in the pentatonic world. And they took their time and there is restraint and there is melody.

He also pointed out something practical: tempo dictates how much harmonic detail you can actually deliver. If you are playing jump blues or West Coast swing at 140 bpm, you do not have room for elaborate substitutions. Fast tempos reward decisive pentatonic phrasing. Medium and slow tempos, funk grooves, and anything with real chord movement are where arpeggio thinking pays off.

Step One: Play the Chord, Not Just the Scale

Start with the simplest possible version. Over a G7 vamp, instead of running G minor pentatonic, play a G7 arpeggio: G, B, D, F. Those four notes are literally the chord. Play them ascending, descending, from the root, and then from the third.

Corey's practice recommendation is to get three arpeggio qualities under your fingers across the whole neck:

• Minor 7 (root, flat 3, 5, flat 7)
• Dominant 7 (root, 3, 5, flat 7)
• Major 7 (root, 3, 5, 7)

With those three, you can outline a 2-5-1 anywhere on the instrument, which is the single most useful progression to have automated in your hands.

Then Blend It With What You Already Know

The magic is not in playing pure arpeggios. It is in weaving them into your existing pentatonic vocabulary. Corey describes seeing both shapes simultaneously: the arpeggio sitting inside the pentatonic box, so he can drift between chord tones and blues notes without ever changing hand position.

The result is what he calls a more linear sound, something closer to the horn-like or piano-like lines you hear from players like Oscar Peterson, while still being unmistakably a blues guitar player.

Practice drill: loop a G7 groove. Play four bars of pure G minor pentatonic. Then four bars of pure G7 arpeggio. Then four bars where you deliberately alternate every two beats. Do this until the switching stops feeling like a decision.

Step Two: Arpeggio Substitution Over Dominant Chords

This is the concept that opens the door. Once you know your G7 arpeggios all over the neck, stop playing the arpeggio that matches the chord.

Over a G7, play a D minor 7 arpeggio instead.

Here is why it works. D minor 7 contains D, F, A, C. Measured against G, those notes are:

• D = the 5th
• F = the flat 7th
• A = the 9th
• C = the 11th (or the sus 4)

So you are not adding a single wrong note. You are simply skipping the root and the third and landing on the color tones instead. As Corey put it, this is not outside playing at all. It is very diatonic, very inside. It is just an ear twister, because our ears are so conditioned to hear roots and thirds in a blues context.

The E Minor 7 Option

You can push further and play E minor 7 over G7. E, G, B, D gives you the 13th, the root, the third, and the fifth. That 13 on top is a gorgeous, slightly sophisticated color that still sits comfortably in the harmony.

Why This Is All the Same Key

Peel the theory layer back and it becomes obvious. G7 is the five chord of C. D minor 7 is the two. E minor 7 is the three. Everything you are playing lives in C major, which is another way of saying G Mixolydian.

Corey described how he holds all of these frameworks at once and simply chooses which one to foreground:

It is like a patch bay. I want to plug this sound in right now. I want to plug this sound in right now. When you get to a place where you can categorize those, you can turn them on and off.

That is the real skill. Not knowing more information, but being able to select between options in real time.

Step Three: Use Substitutions to Move Between Chords

The most musical application Corey demonstrated was using the D minor 7 idea as a launchpad into the four chord. Play D minor 7 over the G7, resolve it into a G7 sound, then land squarely on the chord tones of C7 when the change hits.

This is how you make a 12-bar blues sound like it has motion instead of sitting on one static scale for the whole form. And it directly answers the criticism Corey said he hears constantly online.

Plenty of people will say that is not blues. If it has 12 bars and it turns around, to me it is blues. It does not matter if it is Chicago, West Coast, jazz blues, Texas blues. All of the language is the same. It is how you phrase it.

That last sentence is worth taping to your amp. The note choices are shared vocabulary. The genre lives in the articulation, the vibrato, the time feel, and the space.

Applying It to One-Chord Funk

Not every gig hands you nice 2-5-1 movement. Corey talked about one-chord funk vamps, where the harmony never resolves and you have to generate all the interest yourself. This is actually where arpeggio substitution shines brightest, because the substitutions become the harmonic motion.

Over a static G7 groove, you can cycle: G7 arpeggio, then D minor 7, then E minor 7, then back to blues scale. Nothing under you changed, but the listener hears movement.

Adding Tension: The Altered Sound

For players who already have arpeggios secure, Corey touched on melodic minor and the altered scale. His shortcut is simple: to get altered tones over a dominant chord, play melodic minor from a half step above the root. Over G7, that is A flat melodic minor, which gives you the flat 9, sharp 9, flat 5, and sharp 5.

Two important caveats he offered from experience:

• He does not use it over static chords. It only works when the harmony is moving somewhere.
• He rarely plays the full scale. He takes a taste of it, a fragment, and then resolves into a C7 arpeggio when the four chord arrives.

In a 12-bar blues you might only get one bar to deploy this, which is why practicing it over 2-5-1 progressions accelerates the learning far faster than practicing it over a blues form.

Two Advanced Tools Worth Knowing

Half-Step Approach Notes

Take any arpeggio and approach every chord tone from a half step below. Over a G7 arpeggio that means playing F sharp into G, A sharp into B, C sharp into D, E into F. This single device instantly adds chromatic sophistication without requiring any new scale knowledge.

The Barry Harris Pivot

The great jazz educator Barry Harris referred to arpeggios as chords, and taught a device where you play the root, then drop the remaining chord tones down an octave. Corey uses this constantly in funky R and B contexts. It breaks up the predictable up-and-down shape of an arpeggio and creates immediate intervallic interest.

Where to Send Your Ears

Corey's recommendation for absorbing this language was immediate and unqualified: Robben Ford.

I do not know anybody that has ever done it better to my ear. He has been in my top three guitar heroes for 25 years.

Ford's Blue Line records are the case study in exactly this approach, blues phrasing and blues feel carrying genuinely sophisticated harmonic content.

The Career Lesson Hiding Inside the Guitar Lesson

The other half of the conversation was about how Corey built a working life in music, and it is worth mentioning because the mindset mirrors the playing advice.

He got fired from a Nashville gig in the early 2000s and thought his world was over. He moved back to Pittsburgh, taught himself how to teach, took a part-time gear demo job with Fishman through a friend, and stumbled into an online lesson career almost by accident when the video company he was shooting with turned out to be TrueFire.

His term for the whole thing is spinning plates. Gigging, teaching, demos, courses, YouTube, and now his own lesson site and artist project. When the road grind stopped feeling worth it, he pivoted. When Nashville's sideman ceiling felt too low, he started his own band because, in his words, he was almost forced into being an artist.

His advice for players trying to build something in 2026 was refreshingly unglamorous:

Work on being the best version of yourself as a person and on your instrument as you can and people will naturally gravitate to that. Because you cannot do anything without an audience, and building an audience is the hardest and most valuable thing.

Your Practice Plan

1. Weeks 1 to 4: Minor 7, dominant 7, and major 7 arpeggios in all five positions. Ascending, descending, and starting from the third.
2. Weeks 5 to 8: Blend arpeggios with pentatonic over a static dominant vamp. Alternate every two bars, then every two beats.
3. Weeks 9 to 12: Substitution. D minor 7 and E minor 7 over G7. Transpose to every key you play blues in.
4. Ongoing: Use the substitution to target the four chord in a 12-bar form. Add half-step approach notes. Explore the pivot.
5. Advanced: Melodic minor from a half step above the dominant, used in fragments, resolving into the next chord.

The through line in everything Corey shared is the same. Learn the material deeply enough that it stops being information and becomes something you can switch on and off at will. That is the difference between knowing theory and using it.