Hi John, moving from v 5.20 beta 1 to beta 2 broke the microphone system on my machine, as in it sounds like a CD skipping wildly back in the old days... It has stayed broken with beta 3, this behavior happens regardless of the mic or the sound input used. I wish I could be more help... I tried hard to find the issue but couldn't, then went and updated my old laptop last night and today the mic was behaving the same as my desktop, went back to previous version, 5.19 v12, and the mic worked, so I uninstalled REW on my desktop and reinstalled with 5.20 beta 1 and the mic is now working. Side question, what is JRE? Thanks for everything.