Silicon Laboratories Selects Sonic Network’s EAS to Provide Ringtone on the AeroFONE Single-chip Phone

Boston, MA January 17, 2006 --- Sonic Network, Inc., a provider of audio synthesizer technology, today announced that Silicon Laboratories Inc. (Nasdaq: SLAB), a leader in high-performance, analog-intensive, mixed-signal ICs, has licensed Sonic Network’s EAS™ (embedded Audio Synthesis) technology for incorporation into Silicon Laboratories’ AeroFONE™ GSM/GPRS single-chip phone. Sonic’s EAS is a device-hardened and validated, high quality audio synthesis solution that supports all current and legacy ringtone formats and provides advanced MIDI audio capabilities to support advanced mobile gaming applications.

”The AeroFONE solution is a complete cell phone system on a single monolithic chip, and partnering with best-in-class providers complements our flexible and fully featured solutions,” said Dan Rabinovitsj, vice president of Silicon Laboratories. “We are pleased to be working with Sonic Network to deliver value-rich audio features to support the growing demand for advanced multimedia functionality on all handsets.”

Jennifer Hruska, founder and president of Sonic Network stated, “Silicon Laboratories’ engineering teams have unsurpassed expertise in mixed-signal technology which has allowed them to create highly integrated wireless chipsets using far less external components than competing solutions. Today’s handset manufactures are now demanding the same on the software side – the pre-integration and validation of the multi-media and communication functionality into complete phone solutions. Therefore, we are pleased to be working with Silicon Laboratories to leverage our market proven, 3rd generation MIDI synthesizer on the Silicon Laboratories platforms.”

Together, Silicon Laboratories and Sonic Network defined a unique hardware/software co-design that leverages the EAS technology and the AeroFONE dual processor (DSP/ARM) architecture. By splitting the audio solution across both processors, the resulting solution is a resource-efficient yet high-performance melody player. This eliminates yet another expensive integrated circuit in the bill-of-materials adding to the benefits, performance and savings afforded by the AeroFONE single-chip family of products.

About Sonic Network:

Sonic Network provides embedded audio software solutions to mobile device and semiconductor designers and manufacturers. Its products are market proven in tens of millions of devices worldwide, from cellphones and semiconductors to personal computers and games to professional audio equipment and music synthesizers. The company also produces a premier line of retail sound libraries, endorsed by Hollywood’s leading film and television composers and enjoyed by tens of thousands of musicians worldwide.

About EAS:

Sonic Network's Embedded Audio System (EAS) technology is a multi-platform audio engine for a variety of embedded audio systems and devices such as semiconductors, wireless handsets, PDAs, sound cards, toys, and other consumer devices. The EAS solution is a customizable software package comprised of a digital audio player, General MIDI (GM) synthesizer, matched wavetable soundsets, and audio extensions for multiple MIDI formats, digital audio effects, mixers, audio codecs, and graphics integration.

About Silicon Laboratories:

Silicon Laboratories Inc. is a leading designer of high-performance, analog-intensive, mixed signal integrated circuits (ICs) for a broad range of applications. Silicon Laboratories’ diverse portfolio of highly integrated, patented solutions is developed by a world-class engineering team with decades of cumulative expertise in cutting-edge mixed-signal design. The company has design, engineering, marketing, sales and applications offices throughout North America, Europe and Asia. For more information about Silicon Laboratories, please visit www.silabs.com.