I had a similar idea several weeks ago. My H/K 330b has a distorted left channel, and I traced it to the amp, not the pre-amp. So I got the idea to down load a tone generator, and a 'scope program to trace further. Long story short, the 'scope program was a P.I.T.A., and did NOT work well, and the right channel was damaged. I'm gonna look for a real scope now. For just monkeying around, NCH tone generator was ok, but I wouldn't bother with any 'scope downloads for any reason. Just my thoughts.