Synchronise a new vocal track to the original video footage.
Replace faulty, distorted or noise-affected dialogue with Automated Dialogue Replacement (ADR). Change some of the vocal lines. Replace the original dialogue with a completely new vocal take in a another language or with a different person’s voice. Substitute location singing with the studio-recorded product.
Send in a replacement track duplicating the timing of the original as closely as possible with the video (which has the track to be replaced on it). You can even record the new vocal live via video link. The new vocal track will then be tightly synchronised to the video, replacing the original with a broadcast-ready master.