Combine CIS input stream to BIS broadcasting with Audio support

[gt2ishan]

Im currently working on a project which should receive audio through CIS and retransmit it over BIS. Im using nrf5340_audio_dk for this.
Ive tried using https://docs.nordicsemi.com/bundle/ncs-3.0.2/page/nrf/samples/bluetooth/iso_combined_bis_and_cis/README.html but this doesnt support audio.

Is there a sample project already that has this behaviours? Please help me.

Thanks

[SwRa]

Hi Ishan,

The official nRF5340 Audio applications (unicast client/server and broadcast source/sink) are designed for either CIS or BIS operation, but do not natively support bridging audio from CIS to BIS within a single application. The transport mode (CIS or BIS) is selected at build time via Kconfig and cannot be switched or combined in the standard audio application.

The controller supports concurrent CIS and BIS from SDK v2.6.0 and the iso_combined_bis_and_cis sample demonstrates this. But there is no application that bridges CIS audio to BIS audio. You would need to develop a custom solution, starting from the iso_combined_bis_and_cis sample and integrating audio pipeline and LC3 codec support yourself.

Regards,

Swathy

[gt2ishan]

Hi,
Do i have to use raw ISO or can i still use BAP? And if BAP can be used is it possible to use it for both CIS and BIS same time?

Regards,

Ishan