Releasing the build
After a big moment, a track needs to settle. A downlifter, also called a downsweep, is a falling sound, such as filtered noise sweeping down, a pitch drop or a decaying synth, that guides the ear from the peak into what comes next. Paired with an impact on the first beat, it makes a drop feel heavier; at the end of a chorus it signals a change without a hard cut.
Using them
Line up the start of the downlifter with the downbeat, then shape its length with a fade so it ends before the next phrase. Low-pass it a little if it competes with the lead. Many producers reverse a riser to make a downlifter, which is a quick way to get a matching pair. Check that both sounds are cleared before you release: the verdict on each card tells you.