Thanks again, no idea what the timing reference is for as I am still new at this, but it did the trick for me to plot my all channel bass response.There is no downmix feature (REW is just controlling the channel selection, not doing any processing of the signal). You can output the signal on a second channel by selecting it as the timing reference output if you are using ASIO drivers.
Thanks, I did try that before but didn't know it had to be restarted to take effect.The graph font size can be increased in the View preferences (REW must be restarted to apply any changes to the font size). I suspect you have REW full screen and so your graph is being scaled down a lot, an alternative is to resize the REW window so the graph is closer to the size you want and doesn't need as much scaling.
YesHello John, are those "distortion" figures" accurate?
If successive measurements don't give repeatable results something is wrong with the measurement setup, which you should track down. Better starting a separate thread for that.Repeating "measure" would yield different THD figures, somethings consistently high, other times low.