https://devzone.nordicsemi.com/f/nordic-q-a/116376/question-about-nrf5340-pdm-gain-signal-attenuationHi DevZone, My customer found that when using the NRF5340 PDM, there is significant attenuation if the incoming audio signal is a 2kHz signal. Upon checking the specifications, I noticed that the PDM has a decimation filter with GAINL and GAINR registersen-USTelligent Community 13Thu, 14 Nov 2024 15:25:59 GMThttps://devzone.nordicsemi.com/thread/510541?ContentTypeID=1Thu, 14 Nov 2024 15:25:59 GMT137ad170-7792-4731-bb38-c0d22fbe4515:57cd7ae9-c7c2-44a3-ba21-fe82fd9ae297Michal<p>Yes, as shown in the datasheet:</p> <p><a href="https://docs.nordicsemi.com/bundle/ps_nrf5340/page/pdm.html#ariaid-title5">https://docs.nordicsemi.com/bundle/ps_nrf5340/page/pdm.html#ariaid-title5</a></p> <p><a href="https://docs.nordicsemi.com/bundle/ps_nrf5340/page/pdm.html#ariaid-title26">https://docs.nordicsemi.com/bundle/ps_nrf5340/page/pdm.html#ariaid-title26</a></p> <p>It is possible to set up up to +20 dB gain adjustment in the decimation filter.</p> <p>Best regards,</p> <p>Michal</p><div style="clear:both;"></div>