nrf5340 audio:LE audio Stream stopped.INSUFFICIENT_RESOURCES

[Reskyllr]

We have an nrf5340 audio application, and there were no problems with the previous development.
But when I want to extend the CIS function, especially when enabling bidirectional transmission, an error occurs, but I cannot determine the reason.
00> HL [00:11:23.514,648] <inf> cis_gateway: Stream 0x20003744 stopped. Reason 13
00> HL [00:11:23.514,648] <wrn> cis_gateway: Unknown stream
00> HL [00:11:23.514,678] <inf> cis_gateway: Stream 0x20003524 stopped. Reason 13
00> HL [00:11:23.515,625] <wrn> cis_gateway: Unknown stream

Reason 13 is BT_HCI_ERR_INSUFFICIENT_RESOURCES.
What causes this error? If bidirectional transmission is not started, it works normally.
What I want to know most is what causes this error.

Thanks,

Reskyllr

[Reskyllr]

Report new progress:
When the bitrate is 64000 (SDU 80) it works fine, why is this? Can I set it to 60 and still have it work?

[dejans]

Hi,

Bitrates are set using CONFIG_BT_AUDIO_BITRATE_UNICAST_SINK and CONFIG_BT_AUDIO_BITRATE_UNICAST_SRC. Default values can be found in <your_project_folder>\src\bluetooth\Kconfig.

Best regards,
Dejan

[Reskyllr]

I know very well how to modify the bitrate, but when modified to 48000, it doesn't work, and when it is 64000, it works.

Thanks,

Reskyllr

[dejans]

Hi Reskyllr,

Which NCS version do you use?

Best regards,
Dejan

[Reskyllr]

2.4.0