Deezer integration in Amazing Slow Downer lets you playback songs from your existing Deezer playlists and the songs you have in your "Favourite Tracks" list.
If you miss a song, just switch over to the Deezer player app and add the song to the "Favourite Tracks" list or one of your playlists.

Please note that support for Deezer is during development. Only 30 second long preview excerpts can be played. We hope to be able to support full length tracks in the future.