Colour Copy originates from the Repro-1 delay unit and was further developed into a stand-alone plugin.
Colour Copy by u-he is now available as a Public Beta plugin and if you want to reduce the spent there is an Introductory Offer available.

Colour Copy is a virtual analog effect plugin inspired by classic bucket-brigade delays (BBD) but extended with modern features. U-he We calls the effect “Colour Copy” because it can deliver the kind vibe action people still love in classic BBD units. As this is a plugin you can get a wider variety of colors.
Download Links:
Colour Copy 0.9b7554 Mac (AAX/AU/VST2/VST3)
Colour Copy 0.9b7554 Win (AAX/VST2/VST3)
Note: Linux version tba, NKS FX compatibility will happen for final release
Temporary public beta serial (expires in a few weeks):
username: beta tester
serial: B1UPT-DTNQ-AA9M-5XQ6-VKTA
Introductory Offer: 49€ – click here to buy now –
(final price will be €69 when released as V1.0)

Some key features:
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The routing is quite flexible – you can swap input channels or mix them into either channel, and the feedback can be cross-fed, inverted (especially good for flanger effects) or mixed in for subtle phase cancellations. Cool feature: In most delays with cross channel feedback, the first delay appears on the same side as the original signal. In Colour Copy you can set up “double cross” routing so that the very first delay is on the opposite side.
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Unlike hardware BBD units, Colour Copy lets you position the left and right tap positions. This lets you move echos independently “forward in time” for e.g. ping-pong or “rushing” delays as well as various stereo chorus or flanger effects.
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In the Feedback Colouration section you can blend between five different “colours” ranging from resonating and gritty to very dark and slowly evolving. These characteristics can also be modified further via the Brightness and Saturation controls.
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The Modulation section lets you modulate the delay rate, tap positions or delay amplitude to create various animated effects.
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The Ducking section lets you automatically suppress the feedback level (the first delay is not affected) according to the dry signal level. This unusual method preserves the spacial effect much better than regular ducking, which removes what the delay was intended to create!
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The Freeze button causes the contents of the delay line to play indefinitely – the sound will loop smoothly until you unlatch the button.
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The Note Sync button lets you control the delay rate via MIDI note number and pitch bend. As the Colour Copy delay times extend down into the milliseconds range, you can even use this to “play” pitched resonant effects from a keyboard or MIDI track.
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Full NKS FX compatibility (in the release version only, not in this beta).
u-he Colour Copy delay plugin
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