tzrider
Write Only User
When you say "voicings" what do you mean?
When you play a chord, certain notes in the chord have different functions. We refer to the various notes in a chord by their numeric position in the scale that would underlie the chord. For example, let's look at the notes in the C major scale to keep it simple, as there are no sharps or flats:
C D E F G A B C
You can number the scale steps from 1 to 8:
1 2 3 4 5 6 7 8
C D E F G A B C
If we spell out a C major chord, the notes will be:
C, E, G
The C is the 1, E is the 3 and G is the 5.
In a chord, the 1 is the tonic or root of the chord. The 5 is the dominant and while it helps you orient to the key it does not provide any information as to whether the chord is a major or a minor, as this note would be the same either way.
The 3rd is known as a "guide tone," which does give you information about whether the chord is major or minor. If you play the third as we've spelled it here, the chord is a major chord. If you drop the third a half-step, in this case the E becomes an E flat, you'd hear a minor chord.
Now that you know the above, a voicing is an arrangement of a chord that may repeat some notes and leave other notes out. One obvious case is what we call power chords, which have only the 1 and the 5.
In this case, we're leaving out the 3, and the chord becomes ambiguous, being neither major, nor minor. In our current example, if someone is playing a C power chord, you could play the C major scale or the C minor scale over it and it would sound fine.
Voicings may also repeat chord tones. The classic power chord grip on guitar plays the 1, 5 and 1, or in our example, the C, G and C. The repeated 1 is an octave higher than the first one. The chord functions the same within the music, meaning the same scales will works with it, but the sound is a bit richer.
Another possible voicing is one that leaves out the 5. This would leave you playing the 1 and 3, which gives enough musical information to at least imply to the listener that it's a C major chord. A C major scale would sound good over this, but if you played a C minor scale, that flatted 3rd (Eb) would sound like a clam.
The bigger the chord, (meaning the more notes it has, e.g., 7th, 9th) the more numerous the chord voicing possibilities. The rules get a little more complicated in bigger chords as to which specific notes you can leave out and still preserve the quality of the chord, but the underlying concept is the same.
Geez man I either need to download your music brain parts or take some sort of music class. 

Thanks!