One small change for many scenes?

Hi, I am programming a game for android with one hundred levels (one level = one scene). But when I finally made all levels, I decided to add some sound effects to countdown timer. So now I need to add audio source to every scene manually. Is there any way how to make it just once and apply this change for all scenes?

Thank you and sorry for my english if something is wrong :wink:

If you have a script that is common to all of your levels (e.g. a score manager or timer) you could use that to instantiate a prefab.

Create a “harness” scene, containing the common objects you forgot, then use Application.LoadLevelAdditive() to load in your 100 different levels where you were previously just loading them.