The HDT Songbook Application is the digital replacement for your HDT Karaoke songbook. It is compatible with all models of HDT Karaoke. The application allows you to quickly search for the songs that you love to sing and it would show you the code to enter on your HDT Karaoke. It also allows you to save your playlist for future reference. The HDT Songbook Application is free for all HDT Karaoke users.