 Mediation technology is the technology by which the human body, and consequently also the human mind, can be given an extension in the digital musical domain.Cartesian dualism had a tremendous impact on cognitive science and in particular on cognitive musicology.Influenced by Gestalt psychology, music cognition research of the last decades of the 20th Century was mainly focusing on the perception of structure, that is, the perception of pitch, melody, rhythm, harmony and tonality.