If you use Synthesia, you need this: Learn any song in half the time – guaranteed. SUBSCRIBE TODAY – newest songs added .\rbr\rbr iPad & iPhone app - Android app - Request a song - .\rbr\rbrIf you use Synthesia, you need this: Learn any song in half the time – guaranteed. SUBSCRIBE TODAY – newest songs added .\rbr\rbr\rbr\rbr iPad & iPhone app - Android app - Request a song - .