https://devzone.nordicsemi.com/f/nordic-q-a/116254/using-onboard-digital-microphone-with-audio_i2sHi, I am currently outputting some audio (1000hz sine wave) via audio_i2s_blk_comp_cb_register and audio_i2s_set_next_buf (from audio_i2s.h ) through the line out audio jack. My next step would be to capture sound from a microphone and play it back inen-USTelligent Community 13Sun, 19 Jan 2025 20:04:05 GMThttps://devzone.nordicsemi.com/thread/518967?ContentTypeID=1Sun, 19 Jan 2025 20:04:05 GMT137ad170-7792-4731-bb38-c0d22fbe4515:34839de2-1c36-4b31-9247-a21dd3e7aab1TomHe<p>Hey Johnny, sorry for the extremely long delay. I&#39;ve been busy with school and job applications for the last couple of months. To answer your question, I&#39;ve actually been able to put together a working sample of the i2s echo application! See&nbsp;<a id="" href="https://github.com/Tom2096/nrf5340_i2s_echo">https://github.com/Tom2096/nrf5340_i2s_echo</a></p> <p>If you build this application, you will be able to hear the on-board PDM Mic. I left in the code some comments on how (I think) the I2S interface works with input/output. I hope this will be helpful!</p><div style="clear:both;"></div>