VocalFusion mono-AEC voice processor for Amazon Alexa Voice Service

XMOS high-performance digital signal processing solutions help you build the Alexa Voice Service quickly into your products. Our mono-AEC voice processor gives you up-close voice capture and processing accuracy at far-field range – even in noisy environments. Ideal if you want to integrate Alexa into kitchen appliances and smart-panels, including smart lighting, heating and security solutions.


Accurate voice capture and barge-in from across the room, even when there’s a lot of background noise and the commands are spoken softly.


Full duplex mono acoustic echo cancellation, noise suppression and dereverberation cut unwanted noise and echo optimised ASR processing.


Using beamforming to track the voice of interest, you’ll get best in class performance at all angles and over long distances.

Our rich optimisation parameters for the XVF3000 voice processor let you adjust for noise attenuation, gain control and residual echo so you can tailor the best voice capture performance for your product. And our engineers are on hand to help you move rapidly from prototype to tuning, and from testing to volume production with a world-class product. See our newsroom for more about our latest customer implementations.

Development Kit


  • VocalFusion 4-mic mono-AEC development kit for Amazon AVS

    XVF3000 processor board

    • Micro-USB connector for power (optional USB2.0 device connectivity)
    • Low jitter, audio quality clock
    • DAC with integrated headphone amplifier
    • 4 configurable user input buttons
    • 13 user-controlled LEDs
    • xTAG interface for JTAG debug

    XVF3000 voice processor (programmable for far-field voice capture)

    • Full duplex acoustic echo cancellation (AEC)
    • Barge-in
    • 4-microphone adaptive beamformer
    • Dereverberation
    • Noise suppression Automatic Gain Control (AGC)
    • Direction of arrival (DOA) indication

    Microphone Array

    • Linear, 100mm long
    • 4 x Infineon IM69D130 PDM (Pulse Density Modulation) MEMS microphones
    • 33.33mm inter-mic spacing


    • Raspberry Pi header
    • Inter-Integrated Sound (I2S) audio interfaces
    • Inter-Integrated Circuit (I2C) serial control interface
    • High speed USB2.0 compliant
    • Multi-channel USB audio class 1.0
    • 128-pin TQFP package 0.4 pitch



  • XVF3000 voice processor

    • 4-channel digital microphone interface
    • Full duplex mono acoustic echo cancellation (AEC)
    • Programmable AEC latency
    • Barge-in
    • Adaptive beamformer
    • Dereverberation
    • Noise suppression
    • Automatic Gain Control (AGC)
    • I2S audio interface or high speed USB2.0 compliant device
    • I2S output to DAC, up to 48kHz PCM
    • I2C serial or USB control interface