Process Process. DIY-machine for engraving sound into plastic, 2012Process. DIY-machine for engraving sound into plastic, 2012Process. DIY-machine for engraving sound into plastic, 2012Process. DIY-machine for engraving sound into plastic, 2012Process. DIY-machine for engraving sound into plastic, 2012Process. DIY-machine for engraving sound into plastic, 2012 < >