Well, using this program, the RMS for the beginning section is roughly -12.4 between both channels. For the entire song it averages to -15.2 RMS (which is a bit different from the DR12). If you want to check it out yourself to measure and such, its here:
http://soundclick.com/share?songid=7317897
Btw, it is normalized to -.2 dB.
Finally got to d/l your song this morning. Interesting stuff, kind of a vibe somewhere between 10CC, Jethro Tull and Synergy in the arrangement. Nice work

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More to the topic, however, but just as interesting IMHO, is the fact that with my typical RMS reading tools I get the following numbers for the song:
Sound Forge: Left channel -18.3dB / Right Channel -18.12 dB
Voxengo SPAN: Left channel - 18.3dB / Right Channel -18.2dB
Elemental Audio Finalis: RMS ~ -18dB / I/O Crest Factor ~ -13dB
As I understand it, Sound Forge and Voxengo are using the "sine" style of RMS measurement - versus Pro Tools and some others which use the "square" style of RMS measurement, which typically winds up being about 3dB higher.
Anyway, now your numbers are making sense, Seaforggys; your DR of about 12 appears to be basically the average crest factor for the song, their RMS reading is probably using the "square" method, and then there's the "sine" RMS, which I'm used to. And your sine RMS numbers of around -18 fit in almost perfectly with what one would expect for a pre-master mix w/o squashing.
Confusing? Yeah. Yet another case where we have at least three different ways of measuring more or less the same kind of thing that come out with three different values.
If somebody wants to regulate or standardize something, perhaps they should look at standardizing measurement values such as RMS values, crest factor measures, and A/D conversion calibrations, and leave the engineering itself to the engineers.
G.