The Roland SDE-3000 is a digital delay effects processor released by Roland in 1982. It was one of the first digital delay processors available on the market and was used by many professional musicians. The SDE-3000 was capable of producing up to 2.5 seconds of delay time and featured a variety of controls, including a low-pass filter and a delay time control. It was used on a variety of recordings, including those by Michael Jackson, U2, and Depeche Mode.