It's nice to have this forum for all things theoretical, so I'll
do my bit for anyone confused about chords and how they are made
up and named. Relative beginners start here: Strictly speaking,
a chord can be two notes and up. For guitarists a power chord of
C5 will be C and G: using a distorted sound on this will sound
good, but if you add the 3rd (E) it will muddy up the sound.
Major chords will comprise the major 3rd with the root and
5th:C, E and G. Minor chords will have the flattened 3rd : E
flat (Eb)in this case. Sus chords have the 3rd replaced by the
4th, so a C sus chord will be C F and G. Listen to the Who's
mighty 'Pinball Wizard' for this one. You can add a 6th to
either the major or minor chords, which in this case will be A.
You'll hear 6th chord in Glenn Miller swing band stuff, and the
final chord of the Beatles 'She Loves You'. A Cmin6 chord will
have the notes C Eb G and A. If you flattened the 6th to Ab it
changes the whole chord relationship and turns it into an Ab
major 7th: don't get co