High-definition radio is taking over the radio world, but most people are not even aware of it. HD radio converts radio signals into the rich, deep sound you’d receive on a CD. It also allows stations to "split" their signal and offer more than one channel on their station, which increases choices for the listener. Just a year ago, almost no stations offered HD broadcasts, and HD radios themselves were hard to find. But now 1,300 HD stations exist, and that number will continue to grow. Some stations are griping about the expense involved in converting the signal. But this is short-sighted because listenership will increase when there are more choices and better quality. HD radio is being installed standard in BMWs, Jaguars, and Hyundais now, and soon, it should be a standard feature on all cars. So why spend $150 a year on satellite radio, when you could spend around $130 one time for an HD radio? The signal is just as clear.