The two most essential and common music effects are delay and reverb. Delay is very closely related to reverb.A delay plug-in does precisely what it says on the tin:it delays the audio signal by the amount you specify and replays it at a later point in time.A delay can be used very effectively to correct errors in timing in a signal or track,but the more common use is to produce an echo effect. You’ve heard it many times: the touch slapback echo on a rock guitar.or the spaced out sound of a trance synthesizer lead.
The first delay effects were created using good old tape.In fact,some delay plug-ins still display themselves in a kind of tape machine interface,complete
with movable tape heads to change the time between each repeat of the original signal.
Every decent delay plug in lets you control the delay time and most of them can be synchronised to the speed of the hosting DAW.You should also find a mix control inside the plug in to let you control how much of the original signal is heard compared to the processed signal. Some important terms here, the original signal is known as the ‘dry’ signal and the processed signal is the ‘dry’ signal. You’ll hear these terms a lot.
You’ll also find a feedback control on most good plugins, wgich lets you send the wet signal back through the delay processor to create thicker, more intense effects. A word of warning though, create to much feedback and you’ll be sticking your fingers in your ears to stop the pain!