Why? Because BeatScanner analyzes audio tracks and classifies them by BPM (beats per minute) of each song. BMP is the ryth of the songs, by that way you can create playlists according to the similarity of BPM, what will make your training sessions to be more active or relaxed depending on th music you listen to.
Choose if you will analyze tracks or full folders with subfolders and in case you think the analysis hasn't been as good as you thought, you can classify them manually.
Once you'll have selected all the songs you want to add o the playlist, create it and enjoy it on your portable multimedia player.