Got it working. I have to click on the Ch Strip and then use the arrow on my keyboard to scroll down, and then hit return. Then it worked. If I click on the option with the mouse, it locks up the interface, and doesn’t give the effect.
Now that I’ve got it working, it’s fantastic. Now my problem is bypassing the headphone out of the dspMixFx, so I get only the headphone out of Reaper.
Solving one problem at a time. Sometimes you have to know if your expectations are not inline with reality, and you telling me it’s supposed to do what I expected made me double down trying everything.
Thanks so much for your help.