Music Hack Day is a hacking session in which participants will conceptualize, create and present their projects. Music + software + mobile + hardware + art + the web. Anything goes as long as it's music related. The 4th Barcelona Music Hack Day will be organized as an event of the Sónar+D within the Sónar 2013 festival. Neuroscience and Music (Special Call) Get the chance to develop a new application interfacing music with the brain at the Barcelona Music Hack Day 2013!! We are looking for a new connection between neuroscience and music.