Sideband is a professional touring offshoot of the Princeton Laptop Orchestra (PLOrk). "In Line" is a piece that uses modified controllers from a golf video game as well as the special PLOrk-style hemispherical speakers.
The instrument was written in SuperCollider and has different states it can be in. At the beginning, the instrument plays streams of pitches where pitch and tempo are both entwined, creating interesting melodies where higher notes are always faster. The right hand moves side to side to control this, and the other directions control volume, reverb, attack, filtering, and so on.
Everybody starts in a common pulse. When two players match tempo outside this common pulse area, their instruments "lock" and become fixed at that new pitch. Then they can play a game of trying to match the downbeats of their respective pulses by playing with the phase. Once they match phase, their instruments turn in to drones.
The form of this piece was arrived at in rehearsal after the instrument was deigned. Other uses for this instrument are possible, and this piece was adapted and arranged by David Code with the Kalamazoo Laptop Orchestra in an entirely new way. (This can be seen at https://www.facebook.com/photo.php?v=10152157779805389)