The music of Trajectories, by Anna Thorvaldsdottir, can be performed without the visuals at a concert.
The piece was commissioned by The Reykjavik Center for Visual Music and was premiered at the festival of RCVM in January 2014.
A live performance of the piece with the visuals features a piano performer with electronics and 3 large screens for the visuals (picture on the left below).
The work can also be featured as an installation (not with a live performer). The picture above on the right, and the video above, is taken at the Reykjavik Arts Museum at the exhibition Cadences of Line and color. For more information about the installation for Trajectories see here.
The following clip is taken at a live performance in Reykjavik in March 2014, featuring version with one screen.