miniDSP Ltd, Hong Kong /
www.minidsp.com
/ Features and specifications subject to change without prior notice
3
T
ABLE OF CONTENTS
Table of contents ............................................................................................................................................. 3
IMPORTANT INFORMATION ............................................................................................................................. 4
1
Product Overview ...................................................................................................................................... 6
2
Board Layout and Connectivity .................................................................................................................. 7
2.1
Board layout .............................................................................................................................................. 7
2.2
USB Connectivity ....................................................................................................................................... 8
2.3
Knowles SPH1668LM4H-1 microphones ................................................................................................... 8
3
USB Audio ................................................................................................................................................ 10
3.1
macOS ..................................................................................................................................................... 10
3.2
Windows ................................................................................................................................................. 11
3.2.1
USB Driver installation ..................................................................................................................... 11
3.2.2
Status ............................................................................................................................................... 11
3.2.3
Buffer settings ................................................................................................................................. 12
3.2.4
Volume ............................................................................................................................................ 12
3.2.5
Info .................................................................................................................................................. 13
3.3
Compliant USB audio software ............................................................................................................... 13
4
Custom Microphone Board Development ................................................................................................ 14
4.1
Headers and pinouts ............................................................................................................................... 14
4.2
PDM overview ......................................................................................................................................... 16
5
Additional Information ............................................................................................................................ 17
5.1
Specifications .......................................................................................................................................... 17
5.2
MCU firmware update ............................................................................................................................. 18
5.2.1
Windows .......................................................................................................................................... 18
5.3
Obtaining support ................................................................................................................................... 20
5.4
Schematics .............................................................................................................................................. 20
