From: Barry Silverman - for some reason, my name doesn't show up on the header It is definitely possible for the meaning !Q! P QBQ P !Q! to be interpreted as mass of a hydrogen atom (atomic number 1) As for photon energy - one time (excuse the pun) they related the content of the message to its form was to define '%'. They gave many examples to define both the meaning of '%' and its scaling. You would think that they would use a similar calculation (based on number of tones) to define and scale energy.