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https://www.gauss-friends.org/2019/01/15/de-gauss-telegraph-gemeinsames-musizieren-als-eine-kleine-uebung-fuer-ein-harmonisches-miteinander-en-gauss-telegraph-creating-music-together-as-a-small-exercise-for-a-harmonious-coexistence/
Gauss-Telegraph: Creating music together as a small exercise for a harmonious coexistence