Yeah, physically looping it back to a different input instead of the return jack should do the trick! Looking at the mixer, another idea presents itself-- the send is mono, but the return is stereo. One of the return jacks (I think the left?) defaults to mono return for a mono signal, but if I use the other jack, it should trick the mixer into thinking that it's half of a stereo return. That means that the effected signal will only be on the right channel. The end result is that if I pan my channel centre, the left signal should be clean and the right signal effected. In my sequencer, I can treat a stereo pair as 2 mono signals instead, so that gives me my 2 discrete channels, I think. I'll have to test it out to know for sure.
Then again, just routing it to another input is just as easy, so the way I've described is possibly just being unecessarily clever.
I've tried a Y-cable (I actually had one, though it's not high quality or anything) and it seems to work fairly well. The clean signal's waveform is showing clear signs of DC offset problems, but it's nothing that can't be worked at.
Still, the mixer idea appeals to me, so I'll give that one a try, too! Cheers for the help, Lovekraft.
Now that I've started doing some research for the project, though, I'm still interested in trying out some sort of electronics project. If anyone knows of a very simple and inexpensive project I could try out to get my feet wet with, I'm open to suggestions.
Greg