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Šedifon (Schediphone): Case study on a rare brass instrument

Hruška, Viktor and Berdychová, Tereza 

Josef Šediva (Schediwa), a czech instrument maker, invented a family of brass instruments with a distinctive construction that allows a player to switch between waveguides to achieve trombone-like (brighter) or euphonium-like (softer) sound. The case study presents the instrument housed in the Czech Museum of Music as a part of unique collection. In order to document this, feature spectra and radiation characteristics are presented, as well as other general characteristics of brass instruments (profiles of the both horns, input impedance, etc.). The acoustic documentation is supplemented by historical background. The case study presents theses of a future wider study.