Paul Davis wrote: > go back into the source code directory you built+installed them from. > type: > > make uninstall > plus lots more useful details... and Fernando Lopez-Lezcano wrote: > You should have installed the development packages: > apt-get install libsndfile-devel fftw3-devel > They are part of the Planet CCRMA repository. > Wow, how easy was that? I just didn't realize I could use apt-get to get these from CCRMA's repository since there was no example apt-get command like there is for many of the other CCRMA packages. Now I know to just try it. The worst that can happen is apt-get will just say "Couldn't find package xyz". So, for the record, here's what I did: First I uninstalled the two library packages I had installed in /usr/local per Paul's suggestion. Then: apt-get update apt-get dist-upgrade apt-get install libsndfile libsndfile is already the newest version. apt-get install libsndfile-devel ...lots of happy echoing... apt-get install fftw3 fftw3 is already the newest version. apt-get install fftw3-devel ...lots of happy echoing... apt-get install libgnomeui libgnomeui is already the newest version. apt-get install libgnomeui-devel ...lots of happy echoing... cd directory_where_gwc_tarball_was_unpacked ./configure --prefix=/usr make make install gwc It works!!! Thanks Paul, Fernando and others who helped me get this figured out and upgrade my brain AND my DAW. 8^) Mike Mike Jewell One-Up Audio