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The goal is to achieve this without compromising the traditional sound production methods of the acoustic instrument while leveraging inherent performance gestures with embedded continuous controller values essential to MHCI. Initial investigations have been made into digitally-controlled electromagnetic actuation of the acoustic tines, aiming to allow performer control and sensation via both traditional Lamellophone techniques, as well as extended playing techniques that incorporate shared human/computer control of the resulting sound.
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The instrument's metal tines (conventionally used for plucking-traditional lamellophone sound production method) tines have been adapted to include capacitive touch in order to control a synthesizer. Sensors provide gesture recognition affording the performer a broader, more dynamic range of " musical human-computer interaction " (MHCI) over specific DSP functions. This signal inputs and outputs the microcomputer via stereo 1/8th inch phono jacks. The signal is used for electric sound-reinforcement, creative signal processing and audio analysis developed in Puredata (Pd). A piezo-electric pickup is mounted to the underside of the body of the instrument for direct audio acquisition providing a robust signal with little interference. An embedded Linux microcomputer supplants the laptop. The El-Lamellophone (El-La) is a Lamellophone hyperin-strument incorporating electronic sensors and integrated DSP. This work is in efforts to establish an implementable pitched-percussion hyperinstrument framework for experimentation and pedagogy with minimal engineering requirements. Specific gesture recognition techniques and mapping strategies have been standardized using easily sourced and implementable, low-cost components. The Wiikembe leverages and combines inherent performance gestures with analogous embedded gestural sensing to achieve unprecedented intimate musical-DSP interaction. We chose specific sensors and their placement based on constraints regarding the instrument's construction, playing techniques, the author's idiosyncratic compositional approach and sound design requirements. The Wiikembe extends the sonic possibilities of the acoustic Likembe without compromising traditional sound production methods or performance techniques. The result is a compact and intuitive, robust lamellophone hyperinstrument. The audio inputs into a conventional computer audio interface and routed into Live which handles event sequencing, DSP, and audio bussing. A contact mic is used to acquire a direct audio signal from the Likembe. Puredata (Pd) scales, converts, and routes control data into Ableton Live. An Arduino interface offers explicit control over DSP functions. A Wiimote affords 3D gesture sensing for musical-HCI. The Wiikembe is an augmented Likembe from Zaire, believed to be 100+ years old.