They sell a Qt version!? On the pt020? ?Good grief I would have loved to know that when I bought it. The buzz is so annoying. It does not cut through my machines with the music on but with just music it is torture. It does however get me to shut it off immediately so I guess that is a good thing. Otherwise I would let it run for a few hours more per day. I am going to see if I can add it after the fact.?