Know all those chords that skip a string? Well in its majority, they all come from a theory technique called "drop 3" voicing.
What this means is that:
1 -- It works with 4 note chords...therefore, 7th chords.
2 -- The chord needs to be written from the bass note to the 7th note on top (thinest string)...thus:
1 -- 3 -- 5 -- 7
3 -- You drop the 3rd voice from the top down...so the 3rd here becomes the bass...leaving a chord in the following inversion if we use the example above: 3 -- 1 -- 5 -- 7
Therefore now if you want to make any 7th chord, you can. It's simple math! You first need to know some chord theory and all of your 12 tones. After that, it becomes easier.
Classic example of a drop 3 voicing is the typical chord starting with the root on the 6th string:
Root or 1 -- 7 -- 3 -- 5.......the strings involved in these chord tones are 6, 4, 3, 2....you skip the 5th!!!
The fingers used are 1, 2, 4 (for the 3rd of the chord on the 3rd string), and 3.
Hint: alter the top voice with your 3rd finger to get the #11 or b13 sound. Sometimes these two alterations could be called b5 or #5. More on why that is and the right way to approach the correct name on a later blog :)
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