The medium is an extension of human, but every extension is also an amputation, to use Marshall McLuhan´s vocabulary. This online live performance of Pen and Paper Quartet is a part of my ongoing artistic research exploring artistic extensions and amputations embedded in a telematic performance medium. Pen and Paper Quartet is a simulation of a quartet, where a solo musician is performing in real-time, using pen and paper as instruments and interacting with three delayed versions of the same live performance. Delay-chains of audio and video are used as fundamental parameter for the composition, as well as four approaches to work with dynamics in a digitally mediated live music performance.