---
title: Reference Design - TalkTo and TalkTogether for ST
image: https://dspconcepts.com/hubfs/DSP_Concepts_featim042023.png
---

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## TalkTo and TalkTogether for ST

![TalkTo and TalkTogether for ST](https://dspconcepts.com/hs-fs/hubfs/board%20(17).png?width=500&height=400&name=board%20(17).png "TalkTo and TalkTogether for ST")

Acoustic echo, double talk, and distortion issues make the integration and tuning of audio front-ends extremely difficult in voice calling applications on speaker phones and Intercoms. ST Voice 1-mic TalkTogether Reference design integrates high quality, full-duplex voice communication algorithms on cost-effective STM32H7 MCUs together with real-time tuning and debugging interface on Audio Weaver.

[ Request a Demo ](https://audioinnovation.dspconcepts.com/request-demo?hsLang=en)

## Benefits

#### High quality, full duplex voice communication

- Robust to double talk, acoustic echo, and distortion

#### Flexible tuning options

- 1-mic TalkTogether with advanced tuning options to trade-off between AEC and speech quality

#### Cost-effective BOM for small form-factor products

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

#### Reduce tuning and certification risks and costs

- Embedded Audio Weaver Core and Audio Weaver Designer interface with drag & drop programming environment 
- Real-time debugging tools for expedited hardware validation

## Audio Front-end Features

#### 50+ dB Acoustic Echo Cancellation (AEC) together with Echo Residual Suppression (ERS) for excellent full duplex voice quality

#### Single Channel Noise Reduction (SCNR) eliminates stationary noises such as fan noise and HVAC

#### Automatic Gain Control (AGC) for optimal hearing at the far end

#### Receive Equalization and Volume control for speaker processing at the near end

## Software Integrations

![Software Integrations - Audio Weaver Designer](https://dspconcepts.com/hubfs/awe-icon.svg)

 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 for ST Voice](https://dspconcepts.com/hubfs/awe-icon.svg)

 Audio Weaver Core for ST Voice

 Embedded audio processing engine for Cortex-M7

![Software Integrations - Voice Communication](https://dspconcepts.com/hubfs/awe-icon.svg)

 Voice Communication

 Noise reduction, echo cancellation and automatic gain control for far-end (Tx direction) and Receive EQ and volume control for near-end talker processing

## Hardware Specifications

Processor

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

Memory 

- 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 1-mic for TalkTogether
- Voice Communication QuickStart Bundle: Everything you need to know to design and tune voice communication products, including design guidelines, Audio Weaver Designer layout files (.AWD), and tools to get started.
- USB cable

![TalkTogether Diagram](https://dspconcepts.com/hubfs/diagram%20(1).png "TalkTogether Diagram")

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