Is it possible to sync PA and play music via unicast CIS at the same time?

[chelalv]

I now need to make a program on nrf5340 audio DK, SDK v3.0.2 to scan extended adv and print the BASE information in the subgroup in PA, without sink BIS, besides, a smartphone connected to DK, play music via unicast CIS at the same time.

During my test, the music was a little stuck.

My understanding is that if the duty cycle of Scan Extended Adv is low, it shouldn't affect CIS ISO timing, but might miss some extended adv. My second question is, will PA sync affect ACL CIS ISO timing? Can ACL be prioritized over PA?

[SwRa]

Hello,

Yes, PA sync and extended advertising scanning can affect ACL/CIS ISO timing if not carefully scheduled, and there is no explicit way to prioritize ACL/CIS over PA sync in the current stack. Careful configuration of intervals and duty cycles can help, but some level of conflict is possible when running both roles simultaneously on the nRF5340 Audio DK.

I will discuss this with the experts in LE Audio and update here.

Regards,

Swathy

[chelalv]

Thanks for your reply, Looking forward to more detailed updates