TalkTo for ST: Kiosk

TalkTo for ST: Kiosk

Capture and process voice in the noisiest environments with the cost-effective STM32H747 MCU. Powered by Alexa qualified TalkTo, this reference design brings near-field Voice UI and transcription applications to QSR and retail kiosks, with local and cloud command recognition.


Near-field voice activation

  • DSP Concepts’ high-performance TalkTo Audio Front-end 

Local or cloud command recognition

Cost-effective BOM for small form-factor products

  • Runs on single low-cost STM32H7 micro-controller 
  • No external memory required

Integrated loudspeaker processing for Kiosks that support internal speakers

Audio Front-end Features

DSP Concepts’ TalkTo provides reliable far-field performance in noisy environments

  • • 2-mic fixed beam Beamformer with Single Channel Noise Reduction (SCNR)
  • • 30+ dB Acoustic Echo Cancellation (AEC) to cancel out speaker prompts from the kiosks

Support speaker output with integrated playback processing

Software Integrations

Software Integrations - Audio Weaver Designer
Audio Weaver Designer
Drag-and-drop graphical tool to customize and tune audio processing models in real-time with 500+ modules
Software Integrations - Audio Weaver Core
Audio Weaver Core for ST Voice
Embedded audio processing engine for Cortex-M7
Software Integrations - TalkTo Voice UI
TalkTo Voice UI
Echo cancellation and advanced beam-forming signal processing for near-field command recognition

Hardware Specifications


  • STM32H747XIH6 MCU with Dual Core Arm®Cortex®-M7 running at 480MHz and Arm® Cortex®-M4 running at 240MHz


  • 2048kB Flash
  • 1024kB RAM

Audio I/O

  • SAI audio codec

Board Connectors

  • Camera (8-bit)
  • USB with Micro-AB
  • Ethernet RJ45
  • SPDIF RCA input and output
  • Stereo headset jack including analog microphone input
  • audio jack for external speakers
  • microSD card
  • TAG-connect 10-pin footprint
  • Arm Cortex 10-pin 1.27 mm-pitch debug connector over STDC14 footprint

Board Expansion Options 

  • Audio daughter board 
  • Arduino™ Uno V3,
  • Pmod™ Type 2A and Type 4A
  • STMod+


Included with the demo kit

  • STM32H747I Discovery Kit with STM32H747 MCU
  • DSP Concepts 4 mic array daughter board with selectable 2-mic configuration
  • Voice UI Quickstart Bundle: Everything you need to know to design voice-enabled IoT products, including design guidelines, microphone placement, an Audio Weaver Designer layout (.AWD), and tools to get started.
  • USB cable
STM32H747 MCU Diagram

Ready to get started?