The Synthesis Technology E580 is a mono-in, mono-out audio digital delay that uses a unique 'resampling' algorithm to mimic analog BBD and tape delays. Analog delays have the property that when the delay time is changed, the pitch of the output changes. The E580 recreates this effect. There are 3 modes: clean, BBD, and Tape. The BBD mode adds a low-pass filter that is based on delay time as well as noise. The Tape mode adds non-linear distortion (tape saturation effect) and "wow & flutter" (motor speed variations). The E580 has two outputs: a main Delay and a Tap. The Tap is a percentage (0-100%) of the main Delay. All 4 panel controls are also under CV (-5V to +5V range).