Roland AS1 Sustainer

The Roland AS1 Sustainer is a guitar effects pedal designed to provide a sustained sound to the guitar. It works by using a combination of a compressor and a sustainer circuit to create a sound that is both sustained and compressed. It has been used by many guitarists, including Steve Vai, Joe Satriani, and John Petrucci.

The AS1 Sustainer has several features, including a three-way switch for selecting between compressor, sustainer, and compressor/sustainer modes, a level control for adjusting the amount of sustain, and a tone control for adjusting the tone of the sustain. It also has a built-in noise gate to reduce unwanted noise. Additionally, the AS1 Sustainer has a true bypass switch, allowing the signal to pass through unaffected when the pedal is not engaged.