http://www.st.com/en/embedded-software/ ... hls/fB5GCg
The X-CUBE-VS4A Expansion Package consists of a set of libraries and application examples for STM32F7 Series microcontrollers acting as Alexa-enabled devices.
It runs on the 32F769IDISCOVERY board, which provides a native Ethernet interface.
Key Features
STMicroelectronics framework for the Alexa Voice Service (AVS)
Creation of AVS-oriented STM32 applications
Ready-to-run smart-speaker firmware example
TCP/IP connectivity
AVS-protocol encapsulation
Replaceable basic audio acquisition
Example of a limited audio player