Roland Boss AD-8 Acoustic Guitar Processor Makes ordinary acoustics sound extraordinary! The Boss AD-8 Acoustic Guitar Processor uses COSM modeling technology to transform the piezo pickup sound of an ordinary acoustic into 6 high-end acoustic guitars. It also simulates the warm sound created by miking the guitar's neck and body a world's first! Body and String Enhance controls simulate warm, miked acoustic sounds. Includes high-quality reverb tailored for acoustic guitar, 4-band EQ, anti-feedback circuit, a chromatic tuner with mute, and quick pedal-based operation. The Boss AD-8 has preset memory locations for switching acoustic sounds instantly. Balanced XLR outputs allow direct connection to PA systems.