https://devzone.nordicsemi.com/f/nordic-q-a/19988/are-there-any-libraries-for-the-connection-microphone-audio-codec-nrf52dkI would like to pick up audio signal with a microphone for ex. AKU340, then use audio codec to digitize it, then save the output in a SD card connected to the nrf52, reading that out and analyze at the enden-USTelligent Community 13Mon, 27 Feb 2017 11:32:30 GMThttps://devzone.nordicsemi.com/thread/77779?ContentTypeID=1Mon, 27 Feb 2017 11:32:30 GMT137ad170-7792-4731-bb38-c0d22fbe4515:6c38db85-ed71-4cf8-8c3b-1f0efc720d6eOle Bauck<p>Hi,</p> <p>If you use a microphone with analog output you need to read it using the SAADC (Successive Approximation Analog to Digital Converter). Then you can for example store the values as LPCM in a .wav file.</p> <p>I would recommend to use a microphone with PDM (digital) output instead as you get the PCM values directly from the PDM peripheral on nRF52. There are libraries for the PDM peripheral.</p> <p>For storing the values to the SD card you can use our SD card library, check out the FATfs example in the SDK.</p> <p>Ole</p><div style="clear:both;"></div>