A couple of years ago radio distribution / radio promotion was done by bringing real CDs to the radio stations and music journalists. But now there's a new plattform established we're connected on, too, that anables the radio promotion non-physical. There are only audio files to distribut over the internet and no CD must be manufactered.
Because of that radio distribution / promotion has got much more cheaper then doing it with thousands of CDs send out via mail to the radio stations and music journalists.
All radios stations and music journalists who have access to this plattform can listen to every song of the distributed / promoted CD as real audio.
If the radio stations want to play it on air they just download it into their broadcasting-music-computers as WAVE-Audio.
If a music journalist wants to write about the music and artist he can use the informations (artist infos, artwok, link to the artist homepage and so on) brought up with the music or contacts you for more informations.