sox-plugins-nonfree from the standard repositories at version 14.3.2.2-2.fc18 has a dependency on libsox.so.1 but only libsox.so.2 is available.
--> Running transaction check
---> Package sox-plugins-nonfree.x86_64 0:14.3.2-2.fc18 will be installed
--> Processing Dependency: libsox.so.1()(64bit) for package: sox-plugins-nonfree-14.3.2-2.fc18.x86_64
--> Finished Dependency Resolution
Error: Package: sox-plugins-nonfree-14.3.2-2.fc18.x86_64 (rpmfusion-nonfree)
Requires: libsox.so.1()(64bit)
This is a distribution-specific issue that we can't do anything about. Please file a bug at Fedora/Red Hat's bugzilla, see http://fedoraproject.org/wiki/Bugs_and_feature_requests