Unable to create broadcast source when running broadcast_audio_source sample on nRF5340-DK

[yc]

Hi,

VS Code nRF Connect plugin v2023.4.179

ncs v2.3.0

Using broadcast audio source sample on my nRF5340-DK fail with the following error:

*** Booting Zephyr OS build v3.2.99-ncs2 ***
[00:00:00.449,310] <inf> bt_hci_core: bt_dev_show_info: Identity: D2:AE:84:35:BD:E5 (random)
[00:00:00.449,340] <inf> bt_hci_core: bt_dev_show_info: HCI: version 5.2 (0x0b) revision 0x0d02, manufacturer 0x07e8
[00:00:00.449,371] <inf> bt_hci_core: bt_dev_show_info: LMP: version 5.2 (0x0b) subver 0x0d02
Bluetooth initialized
Creating broadcast source
Creating broadcast source with 2 subgroups with 2 streams
Unable to create broadcast source: -22
Unable to setup broadcast source: -22
*** Booting Zephyr OS build v3.2.99-ncs2 ***
[00:00:00.405,151] <inf> bt_hci_core: bt_dev_show_info: Identity: CB:7E:AE:B6:9F:EA (random)
[00:00:00.405,212] <inf> bt_hci_core: bt_dev_show_info: HCI: version 5.2 (0x0b) revision 0x0d02, manufacturer 0x07e8
[00:00:00.405,242] <inf> bt_hci_core: bt_dev_show_info: LMP: version 5.2 (0x0b) subver 0x0d02
Bluetooth initialized
Creating broadcast source
Creating broadcast source with 2 subgroups with 2 streams
Unable to create broadcast source: -22
Unable to setup broadcast source: -22

prj.conf is as follow:

CONFIG_MAIN_STACK_SIZE=2048

CONFIG_BT=y
CONFIG_BT_DEBUG_LOG=y
CONFIG_BT_AUDIO=y
CONFIG_BT_AUDIO_BROADCAST_SOURCE=y

CONFIG_BT_ISO_MAX_CHAN=2
CONFIG_BT_AUDIO_BROADCAST_SRC_STREAM_COUNT=2
CONFIG_BT_AUDIO_BROADCAST_SRC_SUBGROUP_COUNT=2
CONFIG_BT_ISO_TX_BUF_COUNT=4

CONFIG_BT_DEVICE_NAME="Broadcast Audio Source"
CONFIG_NCS_INCLUDE_RPMSG_CHILD_IMAGE=n # Make sure NCS build system won't build network core for us
CONFIG_BT_HCI_VS_EXT=n # Since we are not going to use Zephyr controller, so we have to disabled the VS command for Zephyr

I already add the configs as this post indicated,and program the firmware hex under nrf\applications\nrf5340_audio\bin\ on the network core.

What am I doing wrong?

Thanks in advance.