A virtual analog effect inspired by classic bucket-brigade delays (BBD), but extended with modern features. Its called "Colour Copy" because it can deliver the kind of colouration people still love in classic BBD units, but with a wider variety of colors. Colour Copy started life as the little delay unit called "Lyrebird" that was built into Repro-1, but the sound was too good not to be developed further and become an FX plug-in.

In most digital delays the delay time alters the size of the buffer. If you quickly modulate or sweep the delay time on a typical digital unit, unmusical glitches propagate through the feedback as the buffer is shortened or lengthened. Like a real BBD, Colour Copy changes the internal sample rate instead (i.e. how fast the "buckets" pass on their content), and this is why Colour Copy sounds so smooth.