1. The colours on the harmony vocals look too similar, will you be able to see what part you are going to sing if two or three people are supposed to sing in the same pitch?
2. What is the green drum part that appear in some songs? It sounds like it should not be there.
3. If they release a song with huge vocal range, how will they be able to fit it all in the vocal box? Will they just make the vocal line thinner?