While you're at the cafe', go to the F8 RPMFusion-free-updates
site and grab the following packges:
This assumes you're running x86 (32 bit F8) and not x86_64. The above packages should cover you fairly well for audio codecs. To install, put them all into a directory together (with no other rpm packages), open a terminal:
yum --disablerepo=* --nogpgcheck localinstall *.rpm
It's possible you may hit a package or two that needs a dependency or two. If so, you'll need to dertermine what package(s) you'll need to get to fullfill those dependencies and find them in the F8 repos while back at the cafe'.
The other repos to look for packages/dependencies are here