
via
this auction"Roland's professional tape delay system featuring advanced low noise circuitry and balanced in/outputs as well as stereo output.
It combines four effects ;
Chorus (analog circuitry similar to the roland dc 20/30)
Echo (tape delay / 6 six modes )
Sound on sound (tape layering effect unique to the 501)
Reverb (spring reverb tank)
All effects can be used alone on mixed in any combination."
