Vintage Digital Delay The Roland SDE3000 is a rack-mountable mono delay, including delay phase, filter, modulation and feedback modulation. With an input attenuator and a variety of connection options, the SDE3000 is useful for almost any application. Key Features • Delay phase, filter, modulation and feedback modulation • Single space rackmount design • Input attenuator • Delay or mixed output • Feedback loop send and return • CV inverted output and external input • Independent control of parameters