Voicings

CMaj7

Drop 3 maj7

Drop 3Drop 3
C3 B3 E4 G4Loading piano…
  1. C3R
  2. B37
  3. E43
  4. G45

Guide tones carry the chord's sound: the 3rd (4th on sus chords) and the 7th (or 6th).

Source: Common practice