Echo: Open Hardware Music Player Echo is an open hardware platform for music players. The goal of the project is to produce a high quality music player, based on and designed with free software. It's primarily designed to run Rockbox, a free music player firmware with support for many codecs, and a wide array of features. KiCAD 8.0 was used for the electrical design and PCB layout. The planned 3D-printable case will be designed using FreeCAD. The designs themselves are available under the CERN-O...