TalkTo for ST: Wearable

TalkTo for ST: Wearable

With the ST Voice Wearable reference design, DSP Concepts enables near-field voice activation on wearable devices such as smart watches, fitness bands using power and MIPS optimized 2-mic TalkTo.


Near-field voice activation

  • DSP Concepts high performance 2 mic TalkTo Audio Front-end 

Cost-effective BOM for small form-factor products

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

Audio Front-end Features

DSP Concepts’ TalkTo for excellent near-field performance in noisy environments

  • • 2-mic Beamformer with Single Channel Noise Reduction (SCNR)
  • • 15+ dB improvement in noise cancellation performance with stationary and non-stationary noise conditions

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
TalkTo Voice UI
Echo cancellation and advanced beam-forming signal processing for near-field command recognition

Hardware Specifications


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

Ready to get started?