This paper gives an overview of RadioActive, a largescale asynchronous audio messaging platform for mobile devices. It supports persistent chat spaces that allow users to engage in discussion on demand. Our goal is to allow users to easily navigate and participate in large audio-based discussions with minimal cognitive overhead. RadioActive attempts to eliminate problems that habitually plague audio-only designs by using a novel combined visual and audio interface. Keywords Asynchronous audio, audio design, BBS, chat, HCI, mobile applications, persistent audio ACM Classification Keywords H. Information Systems, H.4 Information Systems Applications, H.4.3 Communications Applications 							
						
							
					 															
					Aaron Zinman, Judith S. Donath