The Roland GR-500 is an iconic guitar synthesizer that revolutionized the music world in the 1970s. This Roland innovation allows guitarists to generate real-time synthesizer sounds using their electric guitars. Featuring advanced neck-tracking technology, the GR-500 offers impressive polyphony and a variety of sounds, from string simulation to expressive synth tones. With its distinctive design and pioneering contribution to the fusion of guitar and synthesis, the GR-500 remains a sought-after piece for vintage gear enthusiasts.