Basically, the sound is delayed by a certain amount of time and then added back to the original sound. A single relatively short echo is referred to as a slap echo, and if a little shorter yet, as dou...Basically, the sound is delayed by a certain amount of time and then added back to the original sound. A single relatively short echo is referred to as a slap echo, and if a little shorter yet, as doubling. Flanging and chorusing are similar and are based on relatively short time delays (about 1 to 10 milliseconds for flanging and in the vicinity of 20 to 30 milliseconds for chorusing).
