https://devzone.nordicsemi.com/f/nordic-q-a/125748/question-about-bidirectional-audio-with-nrf5340-audioHi Nordic Team, I’m currently using two standard nRF5340 DKs (non-Audio DK) running the nrf5340_audio application. We’ve successfully adapted I&#178;S speaker output on unicast, and we are now integrating a PDM microphone on the headset side. Our setupen-USTelligent Community 13Fri, 21 Nov 2025 14:05:47 GMThttps://devzone.nordicsemi.com/thread/555064?ContentTypeID=1Fri, 21 Nov 2025 14:05:47 GMT137ad170-7792-4731-bb38-c0d22fbe4515:fca6ec02-7beb-48b4-b695-1a5bda510c68Amanda Hsieh<p>Hi,&nbsp;</p> <p>The&nbsp;<span>USB audio source is limited to unidirectional streams due to CPU load considerations. Please use&nbsp;I2S, which supports bidirectional communication. See&nbsp;</span><a href="https://docs.nordicsemi.com/bundle/ncs-latest/page/nrf/applications/nrf5340_audio/doc/configuration.html">Configuring the nRF5340 Audio applications</a>.&nbsp;</p> <p>Regards,<br />Amanda H.</p><div style="clear:both;"></div>