The ‘Electronium’ René Seybold, Germany, 1950

The Electronium
The Electronium showing amplifier and keyboard

The Electronium A

The Electronium was designed by René Seybold and manufactured by the German company Hohner GmbH in Trossingen, Germany, from 1950 onwards. The Electronium was a monophonic electronic instrument resembling an accordion similar to Harald Bode’s Multimonica. The Electronium had a 41 note keyboard with keys or buttons and 16 ‘registration tabs’, the overall volume being controlled by the ‘bellows’ of the instrument. The Electronium came with it’s own amplifier and speaker and packed into a portable carrying case.
Carrying case of the Electronium
Carrying case of the Electronium

Electronium P

Electronium P was a piano-attachment instrument similar to the Clavioline, Tuttivox and Ondioline. The Electronium P had a three octave keyboard, transposable up or down within six octaves, controlling a single vacuum tube oscillator.The Electronium P was used in music concerts as an add-on for piano players and was much used throughout the 1950’s in Germany for both light and serious music. The Electronium P was used by several German Avant-Garde composers, Karlheinz Stockhausen used various Electronium models on “Telemusik” and “solo”(1952-6) and later on “Kurzwellen” (1968), These pieces being performed by his own group with the pianist Harald Bojé playing a modified standard Electronium.


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