User's Guide

Content
1.Introduction ................................................................................................................ 3
1.1 In the Box ......................................................................................................... 3
1.2 Dev Kit2 Specification ...................................................................................... 4
1.3 Circular 7-Mic Array ......................................................................................... 5
1.3.1 Mic Array Specs ..................................................................................... 5
1.3.2 Mic Array Board Sample and layout ..................................................... 6
1.4 Core Board Sample and Layout ........................................................................ 7
1.5 Audio Data Path ............................................................................................... 8
2. Development Environment ........................................................................................ 9
2.1 Install SDK ......................................................................................................... 9
2.2 Compile environment configuration ................................................................ 9
3. Filesystem operations .............................................................................................. 13
4. Program guide .......................................................................................................... 13
4.1 Mic LEDs program .......................................................................................... 13
4.2 Key .................................................................................................................. 14
4.3 I2C program .................................................................................................... 15
4.4 GPIO program ................................................................................................. 15
4.5 Audio operating programming ....................................................................... 15
5 SDK Multi-media function ......................................................................................... 16
1.Introduction
This Dev kit 2 (referred to as “DDK2” later in this document) is designed For Microsoft
Speech Services Complete, end-to-end system reference design.
This Circular 7-Mic array Dev Kit is a pre-tuned end-to-end reference design that enables the
commercial device manufacturers to efficiently build high-quality speech enabled devices
using Microsoft Speech Services. Developers can integrate the Microsoft Speech
Services into smart speakers, set-top boxes, and other IoT devices with this kit and leverage
premium Microsoft voice recognition technology. It can also be easily configured into a Star
4-Mic array by disabling 3 mics, for evaluating it as a lower cost device.
With the Microsoft Speech Devices SDK, it enables a range of advanced features such as
- Multi-mic array, beam forming, noise suppression, echo cancellation.
- Customizable Key Word Spotting.
- Integration with the world-class Microsoft Speech Services and Bot Framework, and more.
1.1 In the Box