Berklee Music Instructor Loudon Stearns' video series, Tracks Interact, comes to an end with this last video. Here, Loudon demonstrates how ducked delays (in which the effect is compressed by source input) can help a source sound clearer while still providing a delay effect:

Tracks Interact is over, but you aren't leaving empty-handed: Loudon has provided the Live set that he's used for the series as a free download - get it from Berkleemusic.com.

If you're interested in revisiting earlier Tracks Interact videos, check out the whole series on YouTube.