In this paper, we present our practice of Generative Music Workshop (2010-). This workshop is a series of events that reproduce past masterpieces of generative music. The aim of the workshop is historical re-examination of generative works to contribute to recent musical practices with mobile computing devices. We regard that the organization of sounds with environmental elements would be a significant for music application of mobile computer. With this view, this workshop reflects past experimental music/sound art works as one of the practices that is conscious of the relationship between generativity and environment. This paper depicts the diversity of the way to organize sounds in three works: Steve Reich's Pendulum music, Alvin Lucier's Music on a long thin wire, and Richard Lehman's Travelon Gamelon.