XM SATELLITE RADIO AND NEURAL AUDIO ACHIEVE AUDIO BREAKTHROUGH WITH RADIO'S FIRST 24-HOUR CHANNELS IN 5.1 SURROUND SOUND

Denon, Onkyo, Pioneer, and Yamaha to introduce home audio systems that play select XM music channels and programs in XM HD Surround powered by Neural Audio

Washington D.C., December 28, 2005 -- XM Satellite Radio, the nation's leading satellite radio company, will broadcast select XM music channels in 5.1 Surround Sound, marking the first time that a radio company has broadcast in 5.1 Surround Sound twenty-four hours a day.

The audio breakthrough was announced today by XM and Neural Audio Corporation, a leading provider of digital signal processing and surround sound technology for the broadcast industry, in advance of the 2006 International Consumer Electronics Show (CES). The new offering of 5.1 Surround on XM is called XM HD Surround, which provides content with six discrete channels of digital full fidelity audio powered by Neural Audio technology.

Beginning in March 2006, XM will broadcast the free-form music channel Fine Tuning (XM Channel 76) and the classical pops music channel XM Pops (XM Channel 113) in XM HD Surround. XM will also broadcast a variety of special shows and live music performances at the XM studios in XM HD Surround.

XM manufacturing partners such as Denon, Onkyo, Pioneer Electronics (USA) Inc., and Yamaha will introduce home audio systems capable of playing XM HD Surround powered by Neural Audio in 2006.

XM will demonstrate XM HD Surround broadcasts at the 2006 CES January 5-8 in the XM booth #4606 in the North Hall of the Las Vegas Convention Center.

"XM is the first radio company -- satellite or terrestrial -- to broadcast 5.1 Surround Sound on the radio 24 hours a day," said Hugh Panero, XM President and CEO. "Terrestrial radio stations are just starting to convert from analog to digital. XM has been broadcasting in digital format since the day we launched in 2001, and now we are taking another leap forward with the introduction of 5.1 Surround in partnership with Neural Audio. XM HD Surround is the latest example of the technological edge that has made XM the number-one satellite radio company.

"XM was the first company to offer satellite radio, the first to introduce satellite radios for the car and home, and the first to offer portable, live satellite radios. Now we're the first to offer radio channels in 5.1 Surround every minute of every day. We have an outstanding partnership with Neural Audio, which shares the same passion for high-quality sound that we have at XM," Panero added.

"XM HD Surround is setting the bar at a new level with surround sound that enriches the listener's experience with full envelopment and image detail never before available in traditional broadcast," said Geir R. Skaaden, Neural Audio CEO. "We are excited to partner with XM to provide the largest source of 5.1 original music content of any medium today."

Home audio systems enabled with Neural Surround will deliver the full surround experience of XM HD Surround. These broadcasts can also be heard on any existing mono, stereo, or matrix style receiver.

About XM Satellite Radio
XM (NASDAQ: XMSR) is America's number one satellite radio service with more than five million subscribers. Broadcasting live daily from studios in Washington, DC, New York City and Nashville at the Country Music Hall of Fame, XM offers 160 digital channels of choice from coast to coast: the most commercial-free music channels, plus premier sports, talk, comedy, children's and entertainment programming; and the most advanced traffic and weather information.

XM, the leader in satellite-delivered entertainment and data services for the automobile market through partnerships with General Motors, Honda, Toyota, Hyundai, Nissan and Volkswagen/Audi, is available in more than 130 different vehicle models for 2006. XM's industry-leading products are available at consumer electronics retailers nationwide. For more information about XM hardware, programming and partnerships, please visit http://www.xmradio.com.

About Neural Audio
Neural Audio Corporation, an audio development company specializing in digital signal processing solutions for broadcast and consumer electronics, is the developer of Neural Surround™, a proprietary audio format that embeds the rich envelopment and discrete image detail of surround sound and is 100% compatible with stereo content. Chosen by XM Satellite Radio as the format for their 24/7 XM HD Surround programming, Neural Surround™ will introduce the excitement of surround music to a broad audience. Neural Surround™ is supported by major home theater brands and automotive OEM's and is expected to be available in more than 50% of surround sound receivers starting in Spring '06. Neural Audio Corporation is a privately owned company headquartered in Kirkland, WA. For more information; http://www.neuralsurround.com.