https://devzone.nordicsemi.com/f/nordic-q-a/75230/the-clock-between-52840-usb-audio-and-i2s-will-be-out-of-sync-after-few-secondsHi, I try sdk 17.02 nRF52840 usb audio demo,I want to achieve 48KHz stereo music play by a I2S DAC. I finished adding DAC for I2S to play the sound data of USB Audio ,and it works well most time, but I found that about every few seconds ,I can hearen-USTelligent Community 13Tue, 18 May 2021 15:12:03 GMThttps://devzone.nordicsemi.com/thread/310219?ContentTypeID=1Tue, 18 May 2021 15:12:03 GMT137ad170-7792-4731-bb38-c0d22fbe4515:21b82d55-ae0e-4216-bc96-08c0c035d3eeKenneth<p>Ideally you would want to adjust the audio PLL clock to avoid underflow&nbsp;or overflow, this could be done in run-time by monitoring the available buffers. This is not possible on the nRF52-series, but should be doable on the nRF53-series.</p> <p>Kenneth</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/310135?ContentTypeID=1Tue, 18 May 2021 12:06:53 GMT137ad170-7792-4731-bb38-c0d22fbe4515:9b603839-65b8-4843-b5a0-6bf3292613eeOPQ<p>Asynchronous usb audio would be help,&nbsp;Is there any reference on nRF52840 that related to&nbsp;a<span>synchronous usb audio?</span></p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/310120?ContentTypeID=1Tue, 18 May 2021 11:37:02 GMT137ad170-7792-4731-bb38-c0d22fbe4515:5b1ebd7c-546d-42ce-a120-e01af93f3357Kenneth<p><span>It looks like you are experiencing underflow/overflow of data coming in from USB vs. what is sent on I2S.&nbsp;</span></p> <p><span>To overcome underflow/overflow then interpolating/discarding samples would be the solution.&nbsp;Interpolating/discarding samples can introduce distortion in audio, but are depended on the clock offset between peers and buffer size.</span></p><div style="clear:both;"></div>