The host demonstrates how stacking two differently tuned slap delays creates a wider, thicker vocal sound than either delay can produce alone. The setup routes a single delay plugin into dual-mono, assigning separate settings to the left and right sides: one leans toward a doubler with modulation and less sustain, the other pushes further into echo territory with more saturation and a shorter delay time.
When both run together, the interaction between the two asymmetric signals produces a spread that neither side generates on its own. The host notes this is less about understanding the math and more about trusting the result in context, which is a useful reminder that combining two simple tools often beats reaching for a complex one.
The same approach works with any two delay plugins on separate aux tracks, so it translates directly to any DAW. Beyond vocals, the host applies the logic to guitars, synths, and keyboards.