Synchronization precision about CIS and BIS

[Nick_J]

When I try the gateway & headset example of the nrf5340_audio application in the NCS,I found that the syncronization precision is different,which the BIS is more accurately.

the waveform was generate after testing in Gateway pressing BTN4

Figure below is the CIS: 

Figure below is the BIS:

[dejans]

Hi,

In the Broadcast Isochronous stream (BIS), all headset devices receive audio stream at the same time. In Connected Isochronous Stream (CIS) mode, headset devices receive different audio streams which may cause the synchronization to be less precise. Therefore, it is expected that the synchronization is slightly more precise in BIS mode than in CIS mode.

Best regards,
Dejan

[Nick_J]

It doesn't make sense cause the two headset(CISes) is in the same gateway(CIG), it suppose to be the same sync_ref_point to presentation the audio stream.

[dejans]

Hi,

In the documentation, you can read more about the synchronization module.

Best regards,
Dejan