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SETTING UP THE SYSTEM 

CONTINUED

2

Connect the 
Cables

Connect the micro-B end of a USB cable into debug port J1701. Connect the other 
end of the cable to a PC acting as a host terminal. Connect the USB Type-C plug of 
the Power Supply to J302 (USB Type-C Port2), then power up the board using switch 
SW101. Use only J302 for power delivery to the board.

3

Record 
Audio

At the linux command line in the shell terminal you can use the arecord command to 
record audio. The following command will record a 5-second long .wav file on all 8 
microphone channels at 48kHz sampling rate and 16-bits.

% arecord -D hw:3,0 -c 8 -f S16_LE -r 48000 -d 5 sample.wav

9

Summary of Contents for i.MX 8MIC-RPI-MX8

Page 1: ...Quick Start Guide i MX 8MIC RPI MX8 Board...

Page 2: ...ly into the 40 pin expansion connector on the i MX 8M Mini and Nano EVK s The specific layout of the eight microphones allows for various microphone configurations to be evaluated and tailored to spec...

Page 3: ...xpansion Connector Connector Note Pin 1 Note Pin 1 location location Wi Fi BT Antenna Wi Fi BT Antenna Display MIPI DSI Display MIPI DSI Camera MIPI CSI Camera MIPI CSI CPU Board CPU Board BOOT Switch...

Page 4: ...microphones 8 microphones and UI LEDs and UI LEDs Board Power Board Power LED LED MIC_SEL MIC_SEL switch switch Mic Mute Mic Mute LED LED Mic geometry Mic geometry change switch change switch 4 UI pu...

Page 5: ...www nxp com GET TO KNOW THE i MX 8M 8MIC BOARD 8MIC RPI MX8 CONTINUED 5 Figure 2 Back View of the 8MIC Board Note Pin 1 Note Pin 1 location location...

Page 6: ...Quick Start Guide MICROPHONE ARRAY CONFIGURATIONS 6 1 7 8 2 2 3 4 5 6 1 4 Default Configuration 1 7 3 4 1 7 4 5 1 7 3 5 6 2 2 1 3 4 5 6 2...

Page 7: ...ware and documentation are available at www nxp com imx8mminievk The following are available on the website Table 2 Software and Tools ITEM DESCRIPTION Documentation Schematics layout and Gerber files...

Page 8: ...the i MX 8M Mini DDR4 EVK 1 Connect the Boards The 8MIC RPI MX8 connects directly to the EVK through the 40 pin accessory board connector Ensure that pin 1 of the 8MIC RPI MX8 is aligned with pin 1 on...

Page 9: ...of the Power Supply to J302 USB Type C Port2 then power up the board using switch SW101 Use only J302 for power delivery to the board 3 Record Audio At the linux command line in the shell terminal you...

Page 10: ...art Guide 10 4 Playback Audio At the linux command line in the shell terminal you can use the aplay command to playback audio First list the available playback devices aplay l SETTING UP THE SYSTEM CO...

Page 11: ...h that port the following command should be issued aplay Dplughw 1 0 sample wav 5 Storage The 8MIC board should be stored in a dust free container or ESD bag The microphones may be damaged by dust par...

Page 12: ...duct or service names are the property of their respective owners 2020 NXP B V Document Number IMX8MICQSG REV 0 SUPPORT Visit www nxp com support for a list of phone numbers within your region WARRANT...

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