Why can´t I insert sound to my presentation?

I tried to open MP3, Ogg, WMA and WAV files, but everytime I try, it says that the file format is not compatible. ¿What is happening? Thanks

Do you have any codec installed for those audio formats?

You might find a solution there: What video formats does LibreOffice Impress support?

As I said before, I tried with a WAV file, which should be supported.