There definitely is that innocence for a lot of the children, even despite the dark events at least. Luckily for most students in that world, the villain is pretty single minded and only goes after Harry Potter, so that's a nice assurance in some ways haha

For software I do use Synthesia for the falling notes and combine it with an overhead camera (just my phone's) and audio that's recorded into my computer so I don't get the sound of traffic or roommates in the audio feed.