The "Download Now" link directs you to the iTunes App Store, where you must continue the download process. You must have iTunes installed in order to open the link, and you must have an active iTunes account to download the application. This download may not be available in some countries.
Behind the light is the electronic part for my musical composition Behind the light for string quartet and electronics. Only download this app if you plan to study or perform this composition. The application play the electronic sounds of this specific piece and has no use without the score which can be downloaded from www.tutschku.com