Christopher Dean By Christopher Dean Guitarist · Bassist · Instructor

Unlock Every Sound
on the Guitar.

Everybody knows Do-Re-Mi.
Nobody knows what's Mi-ssing.

Open the Interactive Fretboard → or book a lesson with Dean
Book a Lesson Get 4 Free PDFs ✦
7
Shapes
×
5
Missing Notes
=
42
Modes

Every guitarist deserves to understand the instrument in their hands. Not in 30 years. Not with a theory degree. Now.

Tested against 135 historical scales from every tradition. Zero exceptions.

Do Re Mi Fa Sol La Ti C D E F G A B D♭ MELODIC E♭ BLUES G♭ QUEST A♭ HARMONIC B♭ BEBOP

Same notes. Same colors.

C D♭ D E♭ E F G♭ G A♭ A B♭ B C

7 notes you know. 5 you don't. That's the whole system.

Christopher Dean

Dean spent 30 years teaching guitar and watching students hit the same wall. He's toured with Prong and Nita Strauss — and he built a free tool so you can hear the system yourself.

The answer came while teaching two students at once — one learning blues pentatonic, the other learning diatonic modes. The shapes overlapped. The missing notes lined up. A pack of highlighters, a ruler, and graph paper turned that observation into a complete taxonomy. 135 historical scales from every tradition tested. Zero exceptions.

In a town there are many roads that lead to the library. Some are scenic. Some have rougher pavement. None are false. Every culture chose its road. Dead Sea Scales is the first complete map of the town.

He's not asking you to take his word for it. He built a free interactive tool so you can hear it yourself.

ProngNita StraussDarrow Chemical Co.Darkness DescendsAlyxxSchool of Rock30+ Years TeachingIbanez EndorsedFractal AudioAntihero Magazine
Choose Your Adventure

Learn with Dean

Private lessons with the creator of Dead Sea Scales. Learn the system directly from the person who built it. Use the book and tool between sessions.

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1 Hour · 6-Pack Available
"His level of care and dedication is only surpassed by his rocking talent." — Dr. Evan Johnson, Columbia University
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Interactive Fretboard

Pick any key. Pick any mode. Hit play. Hear every scale, see every shape, and use the Decoder+ to identify what you're playing — right now, in your browser.

Open the Tool →
 Dead Sea Scales book open on a dark walnut desk with guitar and amplifier

The Complete Book

All 42 modes. Every fretboard diagram. Interval maps. The full framework. Open to any page — it's designed that way.

Get It on Amazon
The best guitar teaching application I've ever seen. The interactivity and ability to listen and play along is so cool.
Eli Mauceri
Student
Taken me from a novice just wanting to jam to a serious music maker. A literal dream come true. Changed my life.
John Lynch
10-Year Student
You are getting a guitar expert teacher, a personal life coach, and a guide. Dean is AMAZING.
Shelly Klein
Founder, Shelly Klein Consulting · Mother of Student
Free Download

All 4 reference posters. Free.

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Frequency Map
Frequency Map
35 Modes
35 Modes
Hex/Pent
Hex/Pent
Else World
Else World