FILTER FANS, WE WANT YOU! Help with FIR/sinc filter - Adafruit Industries
Published
October 31, 2019
Location
New York, New York
Job Type

Description

We sell these handy PDM mic breakouts in the Adafruit shop.
https://www.adafruit.com/product/3492

On many platforms, the chips will do the decimation and filtering for you and give back a PCM value. On the SAMD, we get the raw PDM bitstream. We wrote a basic FIR/sinc filter, as seen here.
https://github.com/adafruit/Adafruit_ZeroPDM

The quality is pretty good, but it isn't as good as we think it could be! Are you a filtering fan, who wants to work on improving this code to get better quality output? We'd love to hire you to do that!

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