The Holosync soundtrack on the Paraliminals is merely an entrainment soundtrack. There are no words embeded.
Subliminal refers words spoken 'below' the threshold of conscious hearing and you never know exactly what was said.
Paraliminals are two voices which take the listening beyond the ability to consciously hear everything. You can hear every word and if you choose to focus on the words on one side you can. We can hear this type of conversations everyday when around other people, example, school corridors, workplaces, home watching TV while other members are talking in the room. We don't consciously hear everything because we ignore 'other people's' conversations however we know we 'hear' because we sit up and take notice when our name is mentioned.
As for silent sounds being dangerous. That's a rather board statement considering the world around us is bombing us with sounds we don't hear. Which means to us they are silent.
Alex