My a cappella group, The Lost Keys, has started producing virtual choir videos. Here’s our first, Dua Lipa’s Break My Heart:
We recorded the audio first using a reference track. I edited and mixed the audio in Pro Tools. Then each member lip-synced a video and I edited those in DaVinci Resolve 16.
@nathanielgranor, am I right in hearing that there’s varying levels of reverb applied throughout? I find it really interesting, the transitions between dry and reverb audio. Also: are we hearing more parts/layers than faces? (Did any singers contribute more than one track?)
Haha, great ear!
I have a lot more experience with audio engineering than video, and with editing than mixing. I was trying to go for a more heavily-processed sound on this given the original track. One way of doing that was varying the reverb in different parts of the song. Also using different types of reverb for different collections of voice parts (the solo vs the “shoe” for example). I don’t think there was any spot where I completely dropped out the reverb, but I did use automation to reduce the reverb effect from “wet” to “dry” in a few places.
In terms of the number of parts, I think each singer in the video had just one primary part in the background tracks, but there were some additional backup vocal lines that aren’t pictured (we call them “foofs” 
)
Blockquote (we call them “foofs”
Ok, that’s a fun new piece of terminology! Learning new things already!