Lip sync

It was transparent in delhi and culcutta's episodes that many of the songs they sang(not all) were just these guys mouthing to the background song. Especially when they sang together, vinit sang bits that were definitely of debo's voice and vice versa. Some solo songs had resounds to them, while some others had fade-in fade-outs, overlaps, giving an "already edited" feeling.

Do you think what they did was right? Sure they gave a few live song performances but most were lip synched.