If you had a keyboard rig for gigging in the '80s, you probably had an effects rack. And that effects rack probably contained a digital delay for doubling, ping-pong, and echo effects. One of the most popular delays of the era, due to both its affordability and its chewy sound, was the Korg SDD-3000. It was also a part of U2 guitarist The Edge's signature sound.
These days, it has become another one of those things that's hunted to extinction on eBay. Fortunately for the rest of us, Universal Audio has released a component-for-component model for their UAD "powered plug-in" platform. If you own an Apollo, you can even track through it as though it were hardware - a unique feature the Apollo (paired with its Console software) imparts to all powered plug-ins.
If you know much about the folks at UA, you know that they're obsessive about digitally modeling every detail of pieces of classic recording gear -- every quirk and non-linear aspect of how different semiconductors (and tubes) from this or that era interacted to produce this or that sought-after sound. The SDD-3000 is sure to be no exception.
The UA Korg SDD-3000 Powered Plug-In is available now for US $199. For more details and specs, visit the product page here.