By Amy Lorentzen
The Associated Press

CEDAR RAPIDS, Iowa - After years of preparation, digital radio receivers finally went on sale nationwide Wednesday, pairing CD-quality audio in over-the-air broadcasts with text information such as song titles, weather and news alerts.

The launch officially began this week in Cedar Rapids, where one station broadcasts in digital.

Local engineer Nathan Franzen, 25, became the first to have a digital receiver installed in his car, a 2001 Pontiac Grand Prix. The small black radio by Kenwood USA is about the size of a regular car stereo and costs $350.

"I'm proud I could be part of this. And I think back what it must have been like to be the first person to buy an FM radio, and this is something similar," Franzen said. The first song he heard on the new stereo was "Hey Ya!" by Outkast.

Digital, high-definition service has been touted as one of radio broadcasting's biggest advances in nearly a century.

Unlike satellite radio, a subscription service that also uses digital signals, digital radio represents a technological upgrade of the free service offered by traditional "terrestrial" broadcasters.

In addition to providing CD-quality sound, high-definition radio receivers can display whatever text broadcasters choose to offer.

"There's not been anything this technologically important to radio since FM," said Laura Behrens, an industry analyst with Gartner Inc. "Everything we know about media is going from analog to digital, and radio is the last to really take that step."

Several manufacturers are set to show off digital radio receivers at this week's gigantic Consumer Electronics Show in Las Vegas.

The digital broadcasting technology was designed by Columbia, Md.-based iBiquity Digital Corp., a private company partially owned by such media heavyweights as ABC, Clear Channel and Viacom.

Digital radio has been used for several years in Canada, Israel and Europe. In the United States, the Federal Communications Commission voted in October 2002 to adopt iBiquity's technology as the standard for digital broadcasts and allowed radio stations to begin broadcasting digital signals in addition to traditional analog signals.

Stations eventually will be able to broadcast two separate FM programs on one channel simultaneously, thereby offering customers more programming options. Listeners also will be able to save their favorite tunes and programs and replay them when they want.

"Think of it as the transition from black-and-white TV to color TV," said Bob Struble, president and CEO of iBiquity Digital. "The move to digital means better quality."

Only about 300 of the United States' 13,000 radio stations have become licensed for digital, but Struble said that covers 100 markets, including New York, Los Angeles and Chicago - and smaller cities such as Cedar Rapids.

Digital receivers like Franzen's Kenwood model also pick up AM-FM analog radio. If the radio strays from the digital service area, it seamlessly switches over to analog reception so the listener doesn't get cut off from the broadcast.

Struble said that just as it took time for CDs to replace cassette tapes, so will digital take some time to make its way into American homes, where the average family owns about six AM-FM radios.