Well, they are definetly different than school auditions. But, yes if you mess up in one note it does hurt you a bit if they have never heard of you before,but if you do perfect on the rest than you WILL (sometimes) make it you just have to give it your best shot and you'll follow through. Keep your hope up and keep DEFYING GRAVITY!!No,you do not always have to come prepared with monologue unless they tell you you have to beacause sometimes they already have something for you. I hope this helps you. I was kind of just typing you what i know if you have any more questions though you can still ask me!