Are you implying that some cast members could end up being auto-tuned? Guess that possibility can’t be ruled out.
What im saying is that, when they are filming, unlike a live show or play( tho on live show i would not rule that out), they have lots of things to remember especially if there is dance, so that means when they are filming, that actually happens on musical films and tv show or even videoclips( i saw some explaining the making of), the casts and even singers are not actually singing for the cameras, the songs were previous recorded before and then they simply play, in order to help the actors, i mean they are not doing a live concert for the cameras and we all know that even on those, there are time on artists say that they are auto tuned and they simply move their lips to help them deal with the dance moves, im not saying they wont be singing, i`m saying the songs they are supposed to sing were already recorded by them before.
But mostly what i was saying is that, even if the cast doesn`t know how to sing very well, in studio, there are ways to make them look like they can sing, and i must say, singing one song for example in past projects is very different than singing original songs, where certain notes and tunes may be used and singing several songs, this only someone that had voice and music lessons knows, and like i said, only Colin i believe has experience with this area, i mean singers can became actors, but is very rare a actor become a singer.
So, if asterisks means scene with songs, so there will be 12 scenes with songs, the 1st group home bedroom, i assume is past emma again, and in those we can see who is singing or not, would mean maybe young Emma, Charming, maybe Snow???, Zelena, Regina/EQ, Hook , granny, dwarfs, gepetto and then a group song.
"I offended you with my opinion? Ha, you should hear the ones I keep to myself".