So. I'm not a Qt/C++ wizard of any kind but I fooled around with the code a bit and this is what came out.
Years ago I had an analogue modular synthesizer and I built a couple of modules to it myself. One unit was a digital noise generator with a built in VCO that could be sweapt across a rather wide range. The Bit Bomber (please suggest a better name!) is inspired by that module but you have to compile it yourself. The binary would probably not be of any use to you as I run a custom core2 linux kernel and I don't think it would work for an amd64 kernel.
Sample1
Sample2
Sample3
If you want to compile it(No Binary):