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Orban Goes to Vegas for NAB 2007

Tempe, AZ - April 11th, 2007 — Circuit Research Labs, Inc. (OTCBB: CRLI.OB), parent company of Orban/CRL, a worldwide leader in audio processing for AM, FM, TV, and Internet broadcasting, today announced the company's activities as an exhibitor at the National Association of Broadcasters 2007 Convention in Las Vegas April 16th-19th, 2007.

For the first time, because of the company's deep involvement in the developing fields of internet and cell phone audio streaming technologies, Orban's booth will be located in the multimedia area in the South Hall, Booth Number SL3705. Orban products will also be displayed in the radio and television halls at authorized dealer booths.

Radio Hall:

Television Hall:

Bob Orban

Orban Founder and VP of Engineering Bob Orban, and VP of New Product Development Greg Ogonowski, will be available for questions and demonstrations, and all of the new technologies developed by Orban's industry leading engineering team will be demonstrated. Early in 2007, Orban surpassed over 1,000,000 downloads for the Windows Media Plug-in for the Coding Technologies aacPlus audio codec. The Orban Coding Technologies AAC/aacPlus™ Player Plug-in is a free, full-featured Microsoft DirectShow component that enables MPEG-4 HE-AAC/aacPlus audio files and streams within Windows Media Player™.

Additionally, Optimod-PC 1100 Version 2.1 software will debut. This features an improved, dual-band window-gated AGC that yields smoother, more natural gain riding. Up to 25 dB of gain reduction is now available regardless of the setting of the AGC's compression ratio control. This AGC will also be unveiled in the new 9300 and 8500 V2.

The 1100 can now be controlled via the Microsoft Windows Mixer API and via a direct serial connection to the computer housing the card. The driver has been improved to increase stability and reduce resource usage.

New radio products include the all-digital 9300 Optimod-AM audio processor. The monophonic 9300 is the direct successor to Orban's industry-standard Optimod-AM 9200. The 9300 retains much of the 9200's sonic texture while adding more versatile equalization and a parametric lowpass filter, which allows users to trade off filter ringing against frequency response flatness. This is particularly important now that more stations are reducing audio bandwidth either voluntarily or because their HD-AM digital transmissions require it.

Also being featured is the new Orban Optimod-FM 8500 Version 2.0 software. V2.0 new features are independently controllable equalizer, high frequency enhancer, and multiband compression signal paths for the 8500's FM analog and digital radio processing chains, along with existing duel signal paths for analog and digital limiting and output. This dramatically improves the 8500's versatility by allowing users to fine-tune the analog and digital processing chains independently. Additionally, the 8500's ITU412 MPX Power Controller can now run when diversity delay is enabled.

Version 2 software allows the built-in diversity delay to be applied independently to each 8500 output emitting the analog FM processed signal. Currently shipping 8500 hardware can provide up to 16 seconds of diversity delay to support the latest HD Radio™ Exgine implementations, while earlier 8500s with 8.2 seconds of maximum delay can be upgraded for a fee via an easy DSP board replacement. All 8500s are compatible with V2 software, available as a free Internet download from www.orban.com.

Tuesday, April 17th, join the 3rd Annual NAB Tuesday Night Party presented by Orban, Jampro, Broadcast Depot, RVR, and Staco Energy. Augie Meyers from The Texas Tornados, Charlie Rich Jr., and Bassist Chad Watson provide the music, with food, drinks, and fun for all. Orban's 3rd Annual Tuesday Night party will be held in Ballroom B at the Las Vegas Hilton beginning at 6 p.m., and Orban/CRL customers, dealers, and vendors are encouraged to attend.

Circuit Research Labs, Inc. Forward-Looking Statements
This news release may contain "forward-looking" statements within the meaning of the Private Securities Litigation Reform Act of 1995. Management's anticipation of future events is based upon assumptions regarding levels of competition, research and development results, raw material markets, the markets in which the company operates, and stability of the regulatory environment. Any of these assumptions could prove inaccurate; and therefore, there can be no assurance that the forward-looking information will prove to be accurate.

About Circuit Research Labs, Inc.
Circuit Research Labs, Inc. is a manufacturer of high-quality digital and analog audio processing, transmission encoding, and noise reduction equipment. Circuit Research Labs, Inc. is in the market for radio, TV and Internet audio processing. As technology evolves, Circuit Research Labs continues to innovate with state-of-the-art audio processing products for DAB, DTV and streaming media. The Company purchased Orban® in May of 2000. Orban was founded in 1970 by Bob Orban, who is the world's foremost expert in transmission audio processing for broadcast. Orban leads the industry in the design and manufacture of audio processors for radio, television and Internet broadcasting. Recognized for its standard-setting Optimod® digital audio processors and the Opticodec® codecs, the Orban name has become synonymous with reliable, high performance products. Today, its versatile audio processing equipment and codecs are the products of choice in fast-paced production environments worldwide.

For more information contact David Rusch at phone +1 480 403-8300, fax +1 (480) 403-8301 or e-mail: drusch@orban.com. Information is also available at www.orban.com and www.orban-europe.com.

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