Sorry to bump my own thread but I did a little scouring and found that Jesper Kyd was part of Zyrinx, the company who did Sub Terranea and a few other impressive Genesis games (and the tech demo), and chances are he's the one who did the tech demo music. I found some of his stuff over at AMP, and it sounds similar to the music in the tech demo but none of the hosted files seem to be it.
voice samples used in the song;
"My time is your's"
"We need a new Unity."
"I thought that unity was discouraged, Mr Senator."
"We need descent, we need a creative descent." (or "dissent" instead of descent?)
"Our voices are not raised in any harmonious chorus, but our differences are differences of empathy."
Hmm, a brief google search shows some of hte same lines used in some song called "Regime of Coincidence, State of Gravity" but I can't find THAT song anywhere to verify.
Still searching, if anyone can offer more input, it'd be appreciated :)