> C9, C11 or C13 respectively instead of, say a Csus2, Csus4
That's actually not correct. sus, as in "suspended", implies that the third is absent from the chord. Cadd2 or Cadd4 would be more correct. A major chord with an added forth is kind of a weird sound, however -- too unstable, the fourth wants to resolve. add2 chords are fairly common, though!
That's actually not correct. sus, as in "suspended", implies that the third is absent from the chord. Cadd2 or Cadd4 would be more correct. A major chord with an added forth is kind of a weird sound, however -- too unstable, the fourth wants to resolve. add2 chords are fairly common, though!