DDD is a stereo "dimension" chorus, modeled after a well known hardware device.
Chorus effect is achieved through analog delay devices, namely "BBD" Bucket Brigade delay lines.
Several algorithms are aimed to give a track "dimension" and stereo width while avoiding vibrato and typical pitch shifting effects.
All stages are modeled, including the companding section, an analog expansion-compression system which optimizes the signal for the analog delay, and the BBD lines with their level and frequency dependent sound.
An input gain control (balanced for constant output level), together with an input level and a companding meter, gives control on the sound, from clean to dirty, while providing an inside view on the internal processing.