Roland GR-500 Guitar Synthesizer

The Roland GR-500 Guitar Synthesizer is a vintage analog guitar synthesizer from the late 1970s. It was the first guitar synthesizer to be released by Roland and was used by many famous guitarists, including Eddie Van Halen, Steve Vai, and Pat Metheny. The GR-500 works by converting the sound of a guitar into an electrical signal, which is then processed by the synthesizer's circuitry. The GR-500 features two oscillators, a low-frequency oscillator, and a voltage-controlled filter. It also has a built-in chorus effect and a built-in distortion circuit. The GR-500 also features a variety of controls, including a pitch bend wheel, a modulation wheel, and a volume control.