As far as I know, it's actually seven different bands, but each band is not completely different musicians - I think I heard that some of the musicians overlap into 6 bands (aside from Spruance, that is)... And yes, one of these bands is concerned with metal.
It's 7 bands (numerologically relevant), one of the bands is the one that "unites" all the other bands, this is the Electro-Magnetic Azoth. Other bands include the Holy Vehm, one of Trey's projects that he has been talking about for a long time already. Look for the clues involving Pythagorean geometry all over the CD. I haven't heard it yet, nor seen the track list, but I bet you that there will be either 7, 12, or 19 tracks on the album, and there will be all kinds of subdivisions involving the number 3, 4, 5, 7, 12, and 19. "The seven and the twelve procure the nineteen", as one of the cyphers on the Book M CD stated. The CD is the first of three, and this one actually represents the Left Pillar (Boaz) of the kabbalistic Tree of Life. The left pillar stands for the female polarity of the universe, the right one represents the male side. The next CD will represent the Right Pillar (Jachin), and the third naturally will represent the Middle Pillar, representing balance. Probably, this third CD will be dominated by the Electro-Magnetic Azoth as it is naturally associated with the concept of balance (the hermetic or chemical marriage). Notice how the cover artwork displays a superimposition of the first letter of the alphabet in the three alphabets of the world's monotheistic religions - Hebrew, Arabic, and Latin. Frankco