After looking around a bit, I have found a solution that works for me.
First, I found a plugin for Foobar that does room correction/EQ. Mathaudio offers a free plugin for Foobar, you need a calibrated microphone, (I bought a MK-1) and it does a really nice job. Looking more into it, Mathaudio also works with Reaper, a full DAW. This combination allowed me to connect an FM tuner or my Turntable, into the line-in of a PC and apply the Mathaudio Room EQ, output it through my DAC into my Preamp. I will have to buy a Mathaudio and Reaper license to continue to use it (total of $166), but the reults so far are amazing.
If I do plan on keeping this in place, I may get an USB Audio Interface rather than using the PC line-in. Even with using the line-in, FM audio is amazing, playing digital files with Foobar is definitely improved. I have played a few tracks using Reaper/Mathsuiod and there is something happening there that improves soundstage, instrument separation and overall audio quality that even my wife noticed. Having her say anything about an improvement, she usually rolls her eyes up, is significant.
More to figure out, Reaper is a steep learning curve for an old fart like me, especially never having used a DAW or anything like it.
I also sent a question to Dirac re. a plugin for Foobar, they responded that they had a VST plugin that would work with Foobar, sent some instructions and link for a 2 week trial. I will take a look at it when I get some time.