A system is introduced that allows a string player to control asynthesis engine with the gestural skills he is used to. Theimplemented system is based on an electric viola and asynthesis engine that is directly controlled by the unanalysedaudio signal of the instrument and indirectly by controlparameters mapped to the synthesis engine. This method offersa highly string-specific playability, as it is sensitive to thekinds of musical articulation produced by traditional playingtechniques. Nuances of sound variation applied by the playerwill be present in the output signal even if those nuances arebeyond traditionally measurable parameters like pitch,amplitude or brightness. The relatively minimal hardwarerequirements make the instrument accessible with littleexpenditure.