[ fromfile: homework/phononsetup.xml id: phononsetup ]

The first step is to ensure that you have a version of Qt built with Phonon (or Mobility's MultiMediaKit) and that the correct codecs are available on your system to play MP3 files. If you are currently able to play MP3 files on your computer, you are all set. Otherwise, as of Qt 4.7, the Qt SDK provides ready-built binaries of both libraries for most platforms, and they seem to work quite well.

Build and run the starting point example program that you have chosen to ensure that your Qt installation is properly set up for this project.

If you cannot play media of your desired format, see the Installing Phonon Documentation.