Rubber DuckyPT2399 Delay with Ducking

From the vendor

I love delay. It fills out a soundscape, it adds interest, and in general, it's just awesome. However, sometimes you want nice, strong repeats but they can get in the way of the new notes that you play. That can be desirable at times, but other times you want that big, in-your-face delay repeat but a more present, dry attack. The Rubber Ducky allows for precisely this. It's a straightforward delay circuit with an envelope follower and optical compression of the delay signal so that you can dial in just the right amount of detail for new notes while allowing the strong delay to fill the space between notes.

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Ducking of effects using a side chain input is a common studio technique that allows key signals to be more forward in the mix. It gets used on vocals, snares, kick drums, and more all the time. However, this technique is not used much in a pedalboard environment, which I think is