The web page was helpful, but I'm unclear as to when TV levels are appropriate? Like, is TV levels needed when you build a DVD, or BluRay? Or do they tayke full range and the player handles the conversion? Or is TV levels a moot point for DVD and BluRay on modern HD TVs? Or is it just for broadcast? In other words, when do you know when to convert to TV legal levels? Are there standards for when, or is it on a case by case basis based upon who you're giving it to?