Microchip, via its Microsemi subsidiary, announces that its AcuEdge ZLK38AVS Development Kit for Amazon Alexa Voice Service (AVS) now introduces far-field voice pickup and the flexibility to build devices with multiple mic array configurations. The solution reduces BOM costs while addressing the requirements of small-form-factor designs.
The audio front-end development kit with one-mic hands-free and two- or three-mic far-field configurations qualified by Amazon features the ZL38063 audio processor which includes a 300 MHz DSP and dedicated hardware accelerators for voice processing. It also features Stereo Acoustic Echo Cancellation (AEC), which enables barge-in recognition to improve the consumer experience in extreme audio playback environments.
With the flexibility to work with a variety of microphone options and configurations, Original Design Manufacturers and third-party developers can use the development kit to cost-effectively achieve their design criteria across a range of applications and form-factor constraints.
The development kit enables far-field speech recognition in the presence of interfering noise sources, including device playback and external noise sources. The field-programmable, field-upgradable solution features signal-processing algorithms proven to improve both local trigger detection performance and cloud speech-recognition accuracy, while the multi-microphone configurations include Direction of Arrival estimation to indicate where the primary voice sound source is located.
The development kit includes a ZL38063 audio processor that connects directly to a Raspberry Pi 3B with plastics and mounting hardware to simulate a typical, recommended end-application mic-speaker arrangement. It supports all microphone options and includes an LED ring to report the detected sound location, as well as a high-quality speaker that is representative of a typical smart speaker application. Microchip has audio labs and tuning facilities located worldwide which support customers from design through Amazon certification.