This article discusses the transition of instruments in The SINE WAVE ORCHESTRA (SWO), which is a participatory sound performance project. Its basic concept is that each participant plays a sine wave, to collectively create a sound representation. Although all SWO works use the same sound source (i.e., sine waves), each SWO work employs different instruments. The employment of various instruments results in different styles of collective sound representation. This article examines five of the instruments utilized in SWO works. In The SINE WAVE ORCHESTRA The Stairway, the participants played sine waves with light-sensitive instruments as well as other instruments. In The SINE WAVE ORCHESTRA stay, participants accumulated sine waves in an echoless chamber. In The SINE WAVE ORCHESTRA nomadic, each participants played and exhibitied a sine wave with a Linux-installed Pod. At The SINE WAVE ORCHESTRA at ZeroOne San Jose/ISEA 2006, each participant played a sine wave with a hand-held plastic egg instrument; in The SINE WAVE ORCHESTRA mediate, participants extended the recursion of sine waves with eight sets of boards. In this article we discuss which elements of the instrument affect how people create collective sound representations and describe the participants' experience with the instruments.