New Sounds from langsound August 21, 2013arts, experimental, musicquite leap langsound once again has uploaded a video where he creates music with his hand movements. This time it’s a string duet. Related posts: MOTION HARP: Music with a 3D interface LEAP Motion Realtime 3D hand animation – VVVV Performance at happe:n: Draw 2.0 – drawing on walls Oh, Christmas Time is here again… SINAP Air Bells.