trautonium

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trautonium. Elec. instr. first exhibited in Berlin in 1930 by Friedrich Trautwein (b Würzburg, 1888; d Düsseldorf, 1956). Similar to theremin, but with extra devices enabling the player to obtain the correct notes of the tempered scale and a variety of tone-colour. Hindemith wrote conc. for it in 1931.