Share this postMusic Hack Day T-shirtmusicmachinery.substack.comCopy linkFacebookEmailNoteOtherMusic Hack Day T-shirtPaulNov 17, 2009Share this postMusic Hack Day T-shirtmusicmachinery.substack.comCopy linkFacebookEmailNoteOtherShareBen Lacker shows off the Boston Music Hack day tee-shirt - hot off the loom.