GDS (Global Delayed Session) Music - new improvisational music with network latency

This is a research report of improvisational computer music with human-computer interaction and music education. Many sensors are used for the interactive communication as interfaces, and many algorithmic agents are connected via networks each other. This paper is intended as an investigation of some special approaches: (1) Unix(Irix)-based network session system called "Improvisession-I", (2) New music model called "GDS (global delayed session) Music" allowing heavy newtork latency, (3) PC-based network session system called "Improvisession-II", (4) Combination of many sensors and interfaces for free improvisation in music called "Improvisession-III" system, and (5) Application prototype produced by YAMAHA.