"Shell voicings" are a family of chord shapes found on the lower strings of the guitar, which include only the essential tones (1, 3 and 7) of each chord. These voicings were pioneered by guitarists like Freddie Green and Django Reinhardt, and are a staple of traditional jazz guitar playing.
For our purposes, they are one of the best ways to either get back to basics (to better understand harmony on the guitar) or to get started comping. So, forget about memorizing tons of chord shapes - you simply need a few basic shell voicings!
Shell Voicings (3-Note Chords): But Why?
As an analogy, shell voicings for jazz guitarists are akin to learning your "C, D, E, G and F open chords" when first starting playing guitar. The 3-note shells describe the harmony perfectly because they contain the essentials of the chord: degrees 1, 3 and 7. By playing just these notes, the ears are able to pickup the harmonic context fully.
Simple, right? :-)
Yes, simple. But still very important for jazz guitarists of all levels.
Not only will you be able to play complete compings (I mean, on entire progressions to tunes) with these easy to learn, easy to play and *good sounding* shell voicings, but also:
- Shell voicings help you in breaking away from stock chord shapes ("grips") and open chords;
- Those 3-note shell chords are easily "extendable" to the 9th and 13th (the real sound of jazz)
- Last but not least: shell voicings are a great starting place go completely "rootless" and let the bass player sound the root of the chords for ya!
This last point is extremely important. It's this kind of process that allows guitarists to break away from standard chord shapes. Once we don't have to play bass anymore, oh boy, watch out! Hear Wes Montgomery play these fast chord runs? ... all rootless voicings!
In brief: shell voicings help you learning both the instrument and harmony better ... because you have to know what you are doing instead of always proceeding by shapes. Then it easier to extend to more advanced (rootless) voicings and so on.
Jazz Guitar Shell Voicings: blues blues blues...
I love playing the blues. In the video (above) we apply 3-note chords to the blues in Bb. Nothing fancy, just a 3-chord blues using 3-note chords on my 3-dollar guitar. (Ok, not really!) For the gearheads: it's a Takamine EC 132 SC. ;-)
I highly encourage you to use that Bb blues in the video as your starting point. Play along with the video, and immediately after, play by yourself at faster tempos. Attempt to play by rote! Then see if you can play the exact same blues progression but in the key of F, using only shell voicings found around fret 6, 7 and 8.
Some More Shell Voicings / Shell Chords for Jazz Guitar
To get you a bit further than the Bb blues, here are the six most common shell voicings for jazz guitarists. In summary, they are covering the three main chord qualities (major, minor and dominant) and have either the root on the 6th string or the 5th string. This is not shown in the video.
Comp those chords left to right, and you have a basic way to play on the II-V-I progression in C major. Neat, uh?
Caveat #1 = Major 7 chords can be a bit tense, so it's best to learn the Major 6 shells as well. The theory: root, third and sixth the degree of the chord. Cmaj6 (or plainly, C6) = C, E and A.
Caveat #2 = What about minor7b5 (a.k.a. m7b5 a.k.a. half-diminished) chords? Simply use the m7 chord shapes. Reason: there's no fifth degree of the chord contained within the shells.
Next Action Step: Play Comping on Standards
Grab a lead sheet now, and start playing chords to known tunes with only shell voicings. But first, simplify the extensions. When (or if) the sheet music has chords with extensions, simplify everything down to the 7th.
If you want to take your shells a bit further, without learning anything new, I highly recommend you go rootless. You've read that right!
So go ahead and re-do the process on the Bb blues, and on standards of your choice, but now completely remove the lowest note of the shell voicings. You will be left with the 3rd and 7th of each chord, laying nicely on strings 4 and 3.
Of course, this works even better if you're even more adventurous and want to start adding some extensions on the top two strings. As shown below. ;-)
Extensions for the Shells: Basics
And, for dessert, here's a basic method to perk up the II-V-I in C major when comping with shells. Let's start using chord extensions.
Extensions are defined as anything above the 7th, so the 9th, 11th and 13th degrees of chords are considered extensions. Notice that extensions can be altered to be flat or sharp. We won't address this now, since there's a whole science to adding extensions to chords, but I'm sure you've seen chords such as E7#9 and G7b13 in your musical life!
Simply add the 13th to the chords with 6th-string root. And add the 9th to the chord with 5th-string root. Here:
Going further: Introductory Course (for Jazz Guitar Chords)
We're not going to play on blues forever (but maybe we should...) But, that's a no-brainer: Shell voicings need to be applied on other chord qualities and other progressions!
If you wish to go further and apply those shell voicings on II-V-I, with 9th and 13th, using interesting rhythms, going rootless (etc.) I highly recommend this:
The eBook is broken down into smaller chunks of lessons for easy, convenient learning.
Marc-Andre Seguin is the webmaster, mastermind and teacher on JazzGuitarLessons.net, the #1 online resource for learning how to play jazz guitar. He draws from his experience both as a professional jazz guitarist and professional jazz teacher to help thousands of people from all around the world learn the craft of jazz guitar.