https://devzone.nordicsemi.com/f/nordic-q-a/100992/nrf5340-audio-development-kit---cis-mode-using-the-zephyr-le-controller---gatt-discovery-fails-due-to-0x05-bt_att_err_authenticationWe are currently evaluating the nRF5340 for an LE Audio application. We have tested with the LE Controller from Packetcraft that is included in the Nordic nRF5340 Audio example application and have not had any major issues in either CIS or BIS mode. Ween-USTelligent Community 13Thu, 29 Jun 2023 01:37:55 GMThttps://devzone.nordicsemi.com/thread/433564?ContentTypeID=1Thu, 29 Jun 2023 01:37:55 GMT137ad170-7792-4731-bb38-c0d22fbe4515:c1569287-977c-40aa-bef6-0a67630e8f97vich<p>Hi Joe,</p> <p>You need the `CONFIG_BT_TINYCRYPT_ECC=y` in your app core prj.conf file, as the open source controller does not enable it in the netcore to save on flash usage.<br /><br />Also, use the latest Zephyr Project upstream main branch, create github issue, use mailing list or discord channels for support with vanilla Zephyr Project implementations.<br /><br />Regards,</p> <p>Vinayak</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/432001?ContentTypeID=1Tue, 20 Jun 2023 12:05:40 GMT137ad170-7792-4731-bb38-c0d22fbe4515:2a0769fa-7603-4b7c-992f-eb06683b5b30Kenneth<p>Hello,</p> <p>The nRF5340 audio reference application is made and tested for the packetcraft only. Down the line it might be possible to switch to a different audio controller, but from my understanding they are not there yet, so for now packetcraft it the only option. My point being that even if you were to solve your immediate problem, I expect you would just find a new one.</p> <p>Regarding coded phy, my initial thought would be that the audio quality would be poor due to the reduced on-air datarate, also have in mind that when packets are 8x longer they tend to be more prune to interference, which will overall reduce the throughput further.</p> <p>Kenneth</p><div style="clear:both;"></div>