Multi-Tron Vintage Silver flat finish

The MULTI-TRON is a dual state variable filter with multiple routing and actuating options. Either filter can be run as an ENVELOPE FILTER, WAH-WAH pedal, or a RANDOM OSCILLATING FILTER musch like a SAMPLE AND HOLD FILTER. It can be used in STEREO, MONO IN -DUAL OUT , or MONO-SERIES to allow for limitless applications. A state variable filter is a type of active filter in electronic circuits which can produce simultaneous lowpass, highpass, and bandpass outputs from a single input. State variable filters are frequently used for modifying frequency response in audio signal processing. At low Q settings they are often used in parametric equalizer circuits, and at high or variable Q settings to create resonant filter modules in analog synthesizers. Both the Mu-Tron III and the Mu-Tron Vol-Wah are examples of optically-controlled state variable filters. The Mu-Tron III translates the musician’s playing dynamics into current which then drives an LED. The Mu-Tron Vol-Wah uses a potentiometer in the foot pedal to sweep current to the LED. The LED in either design then servos multiple photo-resistors to vary the resistance of the state variable filter. In order to acheive a SAMPLE HOLD type of effect, the MULTI-TRON employs a digital micro-processor to control voltages to the LED. These are first run, limited-edition units and may have minor, cosmetic blemishes on the enclosures.