%0 Journal Article %J Leonardo Music Journal %D 2011 %T Social Composition: Musical Data Systems for Expressive Mobile Music %A Robert Hamilton %A Jeffery Smith %A Ge Wang %K mobile music %K social composition %K social music %R 10.1162/LMJ_a_00062 %V 21 %X This article explores the role of symbolic score data in the authors’ mobile music-making applications, as well as the social sharing and community-based content creation workflows currently in use on their online musical network. Web-based notation systems are discussed alongside in-app visual scoring methodologies for the display of pitch, timing and duration data for instrumental and vocal performance. User-generated content and community-driven ecosystems are considered alongside the role of cloud-based services for audio rendering and streaming of performance data.  %Z   %8 12/2011 %9 scientific, aesthetics