Stereo development solution based on Amazon AVS smart speaker microphone array

The VocalFusion™ Stereo Development Kit for Amazon AVS features a compact four-microphone linear array that enables developers and OEMs to add far-field voice capture to consumer electronics and IoT products. The linear design is optimized for integration into smart TVs, sound bars, set-top boxes, digital media adapters, and any other electronic product that requires true stereo echo cancellation. The microphone array captures voice signals even in noisy environments so that commands can be accurately processed and delivered to the Alexa client running on the system processor. Certified by Amazon, the kit provides direct connectivity to four PDM (Pulse Density Modulation) microphones with an I2S interface (USB optional) to connect to an application or host processor. Speech sources are isolated from unwanted noise by integrating advanced DSP techniques including beamforming, echo cancellation, and noise suppression. A wealth of optimization parameters are provided to ensure that the individual acoustics of the final product are optimal. These parameters include adjusting noise attenuation and gain control as well as numerous optimizations for echo cancellation.