Lisas: It basically means voice over work how It’s done is the video is played on a screen and if there is something said that didn’t get picked up on audio when they were filming the episode and it’s to late to do re-shoots then they go into a recording studio or sound studio and do the voice over work.
Lisas: HE my guess is 309 is still in post production and the episode needing tweeking in the the sound department which would explain Ginny’s tweet.
Lisa: Post production could mean sound recording or editing video , adding special effects, etc
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