  This paper describes the development of an Apple iPhone based mobile computer
system for vibraphone and its use in a series of the author's performance
projects in 2011 and 2012. This artistic research was motivated by a desire to
develop an alternative to laptop computers for the author's existing percussion
and computer performance practice. The aims were to develop a light, compact
and flexible system using mobile devices that would allow computer music to
infiltrate solo and ensemble performance situations where it is difficult to
use a laptop computer. The project began with a system that brought computer
elements to Nordlig Vinter, a suite of percussion duos, using an iPhone, RjDj,
Pure Data and a home-made pickup system. This process was documented with video
recordings and analysed using ethnographic methods. The mobile computer music
setup proved to be elegant and convenient in performance situations with very
little time and space to set up, as well as in performance classes and
workshops. The simple mobile system encouraged experimentation and the
platforms used enabled sharing with a wider audience.
