Roland GR20 guitar synth

The Roland GR20 Guitar Synthesizer is a guitar-to-MIDI converter that allows guitarists to access a wide range of synthesizer sounds. It is a powerful tool for guitarists who want to explore the world of synthesizers and expand their sonic palette. The GR20 works by converting the guitar's signal into MIDI data, which can then be used to control a variety of synthesizer sounds. It features a built-in library of sounds, as well as the ability to create custom sounds. It also has a built-in expression pedal for real-time control of parameters.

The GR20 has been used by a variety of guitarists, including Steve Vai, Joe Satriani, and John Petrucci. It has also been used by many other artists, including Nine Inch Nails, The Cure, and The Smashing Pumpkins.