I followed the instructions to install CDLC on Rocksmith 2014 for Mac OSX here: http://customsforge.com/topic/33889-how-to-add-custom-songs-on-mac/.  These seemed to work fine.  I was able to download and install CDLC songs, I can see those songs in the "Learn a Song", I can hear them playing in the background on the selection screen, etc.  So far, so good.   The problem is that ever since following those instructions above, Rocksmith will no longer detect my guitar input (using my realtone cabl