Even though some singers do better in the studio.. Brad Delp is a perfect example, not bad live, but much better in the studio, they have almost unlimited attempts in the studio as well, but live there are plenty of singers that excel, many of them I'd rather hear live, the sound may be worse, but there can be a lot more passion depending on the person, some bands just aren't great studio bands, they don't record well, but they play and sing much better live... an example of a band that sounds at the same level live and studio, Eagles... Any live recording I've heard has not been any worse than the albums for notes and accuracy and what not...