Forest of Sounds (2014) is a 2D animation that takes you on a musical ride in a magical forest. In June 2015, the film was screened at the Montreal International Animation Film Festival. 

The soundtrack, which was composed before creating the visuals, is available on Soundcloud

The following Mood Boards served as visual inspiration for the animation:

A couple of sketches: 

Doing some 3D tests in After Effects: