It was called Sound Wire, not Sound Tube - which is probably why you couldn't find anything... perhaps the name got mixed up with the toothpaste logo in your memory. Memory does that!
https://web.archive.org/web/19961122055147/http://soundwire....
https://www.wired.com/1995/05/net-surf-44/
p.s. I messaged him - maybe he'll show up in the thread
http://web.archive.org/web/19980116081704/http://soundwire.c...