How 21489 EVB connect directly with a microphone?

I want to use 21489 EVB to process the signal from 2 microphones, for  testing beamforming algorithm. The result is  I CAN'T hear my voice from the output channel . But I CAN hear the blowing sound when I blow to the  mic. And when I insert an amplifier , the result is the same, I STILL CAN'T hear my voice from the output channel.

 

How can I use  microphone, silicon mic, for example, on 21489 EVB?  please tell me how can I connect the mic with  21489 EVB, And how to drive the mic. Thanks a lot.

  • 0
    •  Analog Employees 
    on Dec 10, 2020 11:41 AM 1 month ago

    Hi,

    It may not be able to get the inputs directly from MIC. You may need to have an additional circuit for this purpose and the digital signals can be connected directly to the DAI headers. SPORT module in ADSP-21489 can be used to receive data for processing.

    BTW, we would also like you to check if you can provide any input from PC and get output correctly. There are few examples available in the VDSP installation path for this. You can navigate as given below.
    <Installation path>\Analog Devices\VisualDSP 5.1.2\214xx\Examples\ADSP-21489 EZ-Board

    Regards,
    Anand Selvaraj.