“…Audiovisual feedback, and in particular, the use of the auditory channel sound in TUIs, seems to strengthen not only co-located synchronous, but also co-located asynchronous musical collaboration, because visitors can hear others' work and modify it later in time. This fills a gap in Barbosa (2003)'s classification of computer-supported collaborative music, based on user's location and performance synchronicity. We here expand the term local inter-connected musical networks, classified by Barbosa from just synchronous co-located collaboration in networked systems, to include also asynchronous co-located collaboration, within the context of CSCW for music: a collaborative musical installation, in this case a particular configuration of tangible objects on the Reactable, can be modified over time, not only synchronously (generally within groups), but also asynchronously (generally between groups).…”