Roland RE-501 is a versatile audio effects processor that combines echo, chorus, reverberation, and sound-on-sound capabilities. With its free-running tape system, it minimizes wow and flutter, extending tape life to over 300 hours without compromising sound quality. The RE-501 features dual outputs for "three-dimensional" sound effects and both balanced and unbalanced input and output options.

The RE-501 allows for the seamless integration of various effects. The chorus effect adds depth and richness to vocals and instruments, while the echo effect creates spatial ambiance. The sound-on-sound function enables the layering of multiple tracks, making it ideal for creating complex soundscapes. Additionally, the reverberation effect provides a natural sense of space and ambience, enhancing the overall listening experience.