When you copy and paste an audio track to create a vocal double in a DAW, you essentially create an identical duplicate of the original track. While this can work in some rare cases, it usually doesn't result in an effective vocal double due to a few reasons:
Timing differences:
Even the slightest timing differences between the two vocal tracks can make them sound out of sync and create phase cancellation, leading to a thin and weak sound.
Pitch differences:
If the singer's pitch isn't perfect on both takes, the vocal tracks can sound out of tune when played together, resulting in a dissonant sound.
Timing and pitch corrections: If any timing or pitch correction is applied to the original track, the copy-pasted double will sound artificial and may not blend well with the original track.
All in all, we create doubles to make the sound richer and more complete, and we can achieve this only if our doubles have slight differences all the way up.
To create a more effective vocal double, recording a new take and slightly changing the timing and pitch to create a more natural and full sound is essential. This piece will be unique even if you sing everything precisely the same.
Recreating the same audio recording in terms of audio mathematics is impossible, just like fingerprints. But when we copy and paste the same track - this is what we do, and it sounds fake.
Additionally, you can use plugins like delay, chorus, and reverb to give the vocal double a sense of space and depth. But that's usually my part of the job :)
