A reference book for the piano

Every key, every chord, every scale.

The Key Companion: 367 pages, one chapter for each of the twelve keys, drawn for the piano and ready to print. One PDF, straight to your inbox.

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Charles at the piano in the Better Piano studio The cover of the Key Companion
12 keys367 pagesEvery chord, scale and progression
What's inside

Twelve keys, one chapter each

Every key gets the same chapter in the same order, so once you know your way around C you know your way around all twelve. Before the keys, the circle of fifths; after them, an index of every chord, scale and mode by its symbol. The contents page links to every chapter.

  1. The scale
    The major scale with its fingering, on the staff and on the keys, and the recipe of whole and half steps behind it.
  2. Diatonic chords
    One triad on each note of the scale: the seven chords that belong to the key, with their Roman numerals.
  3. Every chord on the root
    Every chord quality in the library on that root, each with every inversion, spelled the way a chord encyclopedia prints them.
  4. Every scale on the root
    The three minors with their fingerings, the two pentatonics and the blues scale.
  5. The modes
    Seven scales hiding inside one key: the same notes with seven different home bases.
  6. Progressions
    From the four chords behind hundreds of hits to the jazz cadence and the Andalusian cadence, voiced so the hand hardly moves.
  7. The blues
    The twelve-bar blues: the basic chart, then the same twelve bars the way a jazz band plays them, with the turnaround written out.
  8. Cheat sheet
    Made to print and keep at the piano: the scale, the triads, the seventh chords and the three minor scales on one page.
The interactive version

Every page plays.

Open the same pages inside the Better Piano Studio and the book comes alive. Click any key on a keyboard diagram, or any note on the staff, and you'll hear it. Every chord progression plays through, and every blues page has a backing track to play along with: the full band, or just bass and drums so you can be the piano. It's free with your Key Companion: the email with your PDF has a link that shows you how.

The Twelve-Bar Blues in A♭ page from the Key Companion

Every key has a page like this.

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A look inside

The C Major Scale page
The scale, on the staff and on the keys
A chord progression page in the key of C
Eleven progressions a key, chord by chord
The Twelve-Bar Blues in C page
The blues, basic and the way a jazz band plays it

I always wanted ONE book at the piano that has everything: keys, chords, scales and more, drawn the way my hands see them. This is that book. Now, I get to hand it to you. Print the pages you need and keep them on the stand. You're going to love it!

Charles CornellCreator of the Key Companion
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One PDF, 367 pages, straight to your inbox.

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