File:Mixtur Trautonium.jpgDescriptionMixtur Trautonium.jpg Mixtur Trautonium. One of two instruments worldwide. Deutsches Museum Bonn Date 8.10.2006 Source Own work Author User:MatthiasKabel
File:MIM Mixtur-Trautonium CN5834.jpgDescriptionMIM Mixtur-Trautonium CN5834.jpg English: Mixtur-Trautonium (Berlin, 1955) at the Music Instrument Museum, Berlin. Date 18 March 2010 Source
File:Subharchord.jpgSubharchord, a subharmonic synthesizer similar to Mixtur trautonium but with a keyboard, was invented in 1962 by Ernst Schreiber at east Berlin, German
File:Subharchord (retouched).jpgSubharchord, a subharmonic synthesizer similar to Mixtur trautonium but with a keyboard, was invented in 1962 by Ernst Schreiber at east Berlin, German