How to setup a call based on CIS or BIS on nRF5340 DK audio boards?

Hi Nordic Team,

I try to have a call based on CIS, CIS is connected, and music playing is ok, so I stop music play, then I plug a microphone into LINE-IN port, then start a call on my laptop, talk through microphone, but the peer phone can't hear any voice for my side. do I miss something? thanks.

Best Regards,

Handom