Duplication of a voice or instrument track with a delay of a few milliseconds to increase the impact or simulate the effect of more performers.
"The sound quality on the CD is outstanding, just like a brand new recording. You have made my wife and 82 year old father-in-law very happy. He's looking forward to playing this CD for his great grand children as much as he did when playing the original record for his daughters when they were young. As always, your service and attention to ..."