A group of Spanish scientists from Universitat Pompeu Fabra in Barcelona (in my heart, I am sure, also musicians) developed a musical instrument with a tangible interface. This electro-acoustic instrument is an interactive table with controls, which move with changing timbre, volume, signal level, etc. Regulators can be absolutely any items. Their movement is fixed by video cameras located at the bottom of the table. All actions are accompanied by dynamic animation, showing all the connections and the duration of the signals.
In other words, ReacTable is a modular synthesizer with a multiplayer mode.
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Under the cut - a couple of "concerts" (including from one Ukrainian DJ) and a link to where to find an emulator to write a couple of tunes at home!