The SuperKar+ is a Eurorack voice module employing Karplus-Strong synthesis to generate the sounds of plucked or bowed strings, struck or blown pipes or tubes, and a wide variety of other timbres—ranging from percussive textures to legato melodies and chords enriched with smart harmonies. With an interface designed for immediacy and inspiration, SuperKar+ brings Karplus-Strong synthesis into a compact, expressive, and intuitive form. 

Features

• Karplus-Strong Delay Feedback Synthesis – Every tone and texture remains in a state of evolving tension, with small parameter changes producing rich timbral variation. 
• Two Independent Voices – A Solo Voice and a Chord Voice can be played simultaneously or independently, each with its own controls and routing options. 
• Full Voice Autonomy – Each voice includes independent parameters for Attack, Decay, and Damping (Damp), and an internal mixer with separate level controls. 
• Extensive CV Control – Core parameters (Attack, Decay, Damp, Pitch, Trigger, Detune, etc.) can all be modulated by CV inputs.
• MIDI Control for Solo Voice – The Solo Voice can be driven polyphonically via MIDI (up to 16 voices) while CV control remains available. 
• Timbre Switching – Each voice can independently switch between “string” (positive feedback) and “tube/pipe” (negative feedback) modes. 
• Detune / Random Pitch Variation – Solo Voice supports random detune per note via CV, adding realism or expressive variation. 
• Glide / Portamento – Adjustable glide for smooth transitions between pitches, more noticeable over wider intervals. 
• Harmony & Scale Modes – Create doubled notes, octave/fifth layering, or “smart harmonies” in conjunction with selectable scales (e.g., Major, Aeolian, Dorian, etc.).
• Flexible Output Configuration: Stereo Modes (Wide / Narrow) with voice panning behaviors; Split Outputs mode (Solo → OUT L, Chord → OUT R); Mono Sum Mode (mixed mono signal delivered to both outputs) 
• Audio Input – External audio can be fed to the module to excite the synthesis engine or act as a sympathetic resonator.
• High-Performance DSP Engine – 520 MHz ARM Superscalar core with 32-bit floating point processing. 
• Compact and Efficient – 12 HP Eurorack width, 38 mm depth. Power consumption: +12V 120 mA, −12V 120 mA, +5V 0 mA. 
• Designed & Built in the USA