Not your ordinary delay! A frequency banded delay that can fix phase issues, or radically change the character of drum sounds, by shifting some frequencies relative to the attack!
Not a traditional echo-style delay, it shines in a few areas:
The maximum delay is fairly short (the maximum depends on the input sample rate) - it’s not an echo - but extremely precise, allowing adjustment by number of samples, milliseconds, or by some number of cycles of a given note, allowing for highly accurate tuning of the output.