In order to compile and install Yammi on your system, type the following in the base directory of the Yammi distribution:
> ./configure --prefix=`kde-config --prefix`
> make install
If compilation is successful, the executable "yammi" and some other files will be installed to the standard KDE directories.
Note: If you are upgrading from a previous yammi version (prior to 1.2-rc), you might have to delete an old yammi.desktop in your KDE installation, if yammi still appears in your menu structure under "Multimedia" -> "More Programs" (it should appear under "Multimedia" -> "Audio player" now).