A lot of stuff has already been covered so I want to trace a lineage of a sonic development.
(2007) Kanye uses a heavy delay and a guitar distortion on a single adlib in Stronger (I need ya *right now*)
(2008) Kid Cudi uses 2 different delays on the chorus in Day N Nite
(2010) Wiz Khalifa has a delay and uses his own voice like it was was a delay on the chorus of Never Been
This began a period where Wiz began just spamming the delay onto the entire song.
Most of the adlibs on the verses here are delays and he also began incorporating the telephone effect onto the adlibs:
In the chorus here the blank space is filled entirely with delay
(2013) Travis Scott uses surgical delay on the chorus of Upper Echelon only letting one word at a time catch the delay (*seven*/*iiide*/*echelon*) These all have the telephone filter on them.
On the same tape, he uses the delay similar to how Kanye used it originally on Uptown. Only using it for a one part (I’m a muhfuccin *monster*/*Woo*), but he lets it fill in the entire empty space similar to how Wiz used it on Medicated.
Then on Drugs You Should Try It he uses the delay in 4 separate ways:
1. Delays most of the chorus and puts a heavy guitar effect on it, the delay is right after the main lyrics so that it creates an additional widening.
2. Delays the verse, pitches it down and puts a heavy distortion on it
3.Delays the bridges, filters the shyt out of them, pitches them down, and then aggressively pans them
4. Uses a rapid delay with distortion at the end of phrases to fill in the space, some of these are panned.
(2016) When Wiz and Travis finally did a song together they spammed the fukk out of the delay, almost as if it was an acknowledgement of this shared history.