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XK-VF3500-L33-AVS VocalFusion® Stereo Dev Kit for Amazon AVS

XMOS presents the first development kit for far-field voice capture with stereo-AEC and a linear mic array qualified by Amazon

Image of XMOS XK-VF3500-L33-AVS VocalFusion Stereo Dev KitThe XK-VF3500-L33-AVS dev kit from XMOS enables developers of smart TVs, soundbars, set-top boxes, digital media adapters, and flat devices with stereo loudspeakers to evaluate the XMOS XVF3500 voice processor, and prototype far-field voice interfaces using the Alexa Voice Service. The VocalFusion Stereo Dev Kit for AVS uses a compact linear array of four digital microphones to capture voice commands and conversations in noisy environments and pass the captured speech to the Alexa cloud-based speech recognition system using an applications processor such as a Raspberry Pi.

Enabling voice control of devices located across the room from the user requires mitigating the challenges of distance, isolation, noise, and directivity, while also enhancing voice clarity. The XVF3500 achieves this using full-duplex stereo acoustic echo cancellation (AEC) with barge-in and programmable AEC latency, in combination with an adaptive beamformer and noise suppression, to locate the desired speech source and effectively isolate voice commands from the stereo audio the device is playing, while suppressing background noise and room echoes.

The kit contains an XMOS XVF3500 processor base board, linear microphone array (4x Infineon IM69D130 MEMS microphones), Raspberry Pi header (I²S audio and I²C control connectivity), micro USB connector for power (and optional USB2.0 device connectivity), low jitter audio quality clock, stereo DAC with integrated headphone amplifier, four user input buttons, and 13 LEDs providing direction-of-arrival indication. The XMOS solution packs DSP, I/O processing, and control software into a single chip, enabling customers to significantly reduce their bills of materials, flexibly tailor their designs, and reduce costs.

XK-VF3500-L33-AVS VocalFusion® Stereo Dev Kit

ImageManufacturer Part NumberDescriptionTypeEmbeddedAvailable QuantityView Details
VOCALFUSION STEREOKIT AMAZON AVSXK-VF3500-L33-AVSVOCALFUSION STEREOKIT AMAZON AVSAudio-18 - ImmediateView Details

ICs

ImageManufacturer Part NumberDescriptionAvailable QuantityView Details
IC MCU 167FBGAXVF3500-FB167-CIC MCU 167FBGA484 - ImmediateView Details

Additional Components

ImageManufacturer Part NumberDescriptionAvailable QuantityView Details
AC/DC WALL MNT ADAPTER 5.1V 13WT5989DVAC/DC WALL MNT ADAPTER 5.1V 13W743 - ImmediateView Details
16GB SD CARD NOOBS SOFTWARERASPBERRY PI NOOBS 16GB16GB SD CARD NOOBS SOFTWARE471 - ImmediateView Details
RASPBERRY PI 3 MODEL B BCM2837RASPBERRY PI 3RASPBERRY PI 3 MODEL B BCM28370View Details
RASPBERRY PI 3 MOD B+ BCM2837B0RASPBERRY PI 3 MODEL B+RASPBERRY PI 3 MOD B+ BCM2837B00View Details
RASPBERRY PI 3 MOD A+ BCM2837B0RASPBERRY PI 3 A+RASPBERRY PI 3 MOD A+ BCM2837B04494 - ImmediateView Details
Published: 2018-02-26