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Cirrus Logic Accelerates Design of Voice-Enabled Devices with Development Kit for Amazon Alexa Voice Service

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Development Kit Offers Complete Low-Power, Two-Mic Solution to Deliver Superior Alexa Voice Interaction Experiences


AUSTIN, Texas – Cirrus Logic introduced a development kit for Alexa Voice Service (AVS), optimized for smart speakers and smart home applications including voice controlled devices, hands-free portable speakers and networked speakers. With the Cirrus Logic IC and software design, the Voice Capture Development Kit for Amazon AVS helps manufacturers quickly get to market with new Alexa-enabled products that feature high-accuracy wake-word triggering and command interpretation even in noisy environments and during music playback.

The low-power Voice Capture Development Kit for Amazon AVS includes a reference board that features Cirrus Logic’s CS47L24 smart codec, CS7250B digital MEMS microphones and SoundClear algorithms for voice control, noise suppression and echo cancelation. The turnkey voice capture reference design enhances “Alexa” wake word detection and audio capture in real world conditions, even from moderate distances in noisy environments, and enables users to reliably interrupt loud music or Alexa response playback. The smart codec uses an on-chip, high-performance digital-to-analog converter (DAC) with a two-watt mono speaker driver to enable high-fidelity audio playback.

Cirrus Logic’s voice capture solution elevates the user experience by suppressing noise and other real world interference for more accurate and reliable voice interactions. This technology improves “Alexa” wake word detection in both quiet and noisy environments and with the user several meters away from the device. Cirrus Logic’s echo cancelation technology is critical to achieving a superior user experience by allowing the user to “barge” into or interrupt loud music playback and Alexa responses, so Alexa can respond accurately to new requests.

The ultra low noise floor and wide dynamic range (130 dB) of Cirrus Logic’s MEMS microphones assure precise voice capture in challenging noise conditions, enabling Cirrus Logic’s SoundClear algorithms to block noise that would otherwise interfere with Alexa wake word and request accuracy.

Cirrus Logic’s smart codec integrates hi-fi DACs, a stereo headphone amp and mono speaker amp to provide OEMs with a low cost bill of materials for products ranging from high-end speakers to simple digital assistants. Designed with the needs of ultra low power portable devices and accessories in mind, it typically consumes 80 percent less power versus competing solutions.

The kit is a complete solution that includes a voice capture board with high performance two-microphone array, Raspberry Pi 3 (RPi3), speaker and a microSD card preloaded with all required firmware for instant productivity. Cirrus Logic’s control console simplifies operation of the various RPi3 applications and provides a robust, user-friendly interface to perform acoustic tuning and diagnostic functions. The voice capture reference board’s schematic design and bill of material are designed for use in most AVS applications with minimal customization, further reducing time-to-market.

The Cirrus Logic CRD1569-1 Voice Capture Development Kit for Amazon AVS is available to qualified commercial device manufacturers through Digi-Key at https://www.digikey.com/products/en?k=598-2471-KIT-ND.

OEMs developing AVS-enabled products can find more information on the Amazon Developer site: https://developer.amazon.com/alexa-voice-service/dev-kits

www.cirrus.com

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