The TuneTrain App

Today's app is the TuneTrain app:

​TuneTrain (https://www.etc.cmu.edu/projects/bravura/) Music creation app; create and edit melodies through a line-drawing mechanic; in the world of TuneTrain, people live at various heights in colorful vertical buildings; to help these people get around, the user can draw a train line to connect them to each other; people represent musical notes and the train line represents a musical melody that kids can create and hear; governed by musical rules; various heights that people live at represent different pitches; the distance between people represent note lengths; the buildings show the underlying chord structure that best accompanies a melody; by learning to play in a world governed by musical rules, kids will learn the fundamental structure of music; (iOS 9.0 or later).