About the Album Offering an amalgamation of modern sound and featuring the enigmatic voices of Shirley Horn, Anna Karina, Nina Simone and David Linx, here Alif [Tree] takes from his past works on ...

That means, whether you know all the words, or just a vague melody, you can sing or hum to the app to try and identify that song. It works surprisingly well when I tested it on the Google app for iOS.