1) Bowed instrument 
Violectra is the trade name of an electric violin produced by Barcus-Berry with the pitch equivalent of an acoustic tenor violin, sometimes called baritone violin. It is tuned an octave below normal violin, i.e. between viola and cello. It was developed in USA by Barcus-Berry in the early 1960s. Jean-Luc Ponty, Michał Urbaniak and Elek Bacsik wer...