LE audio: Simultaneous Broadcast Sink and Broadcast Source

RE: LE audio: Simultaneous Broadcast Sink and Broadcast Source

droid — Fri, 03 Apr 2026 23:25:31 GMT

Hello Maria,

Two example apps were created based on:
zephyr/samples/bluetooth/bap_broadcast_source
zephyr/samples/bluetooth/bap_broadcast_sink

Environment:
NCS 3.2.0
nRF7002DK

bap_broadcast_source was modified to send 1 BIS forever.

bap_broadcast_sink had two build versions:
1. Standard Broadcast Sink
2. Modified Broadcast Sink with Broadcast Source
For initial testing, the Broadcast Source was minimal.
Ext Adv and Per Adv were sent, but no BAP stream data was sent from Host to Controller.
It was expected that SD Controller would send empty frames.

1 was run for over 1 hour without any issues.
2 was run for about 12 minutes before failing
Here is a log snippet for 2. Many frames are lost (every other frame) after the end of log.

Please let me know if you would like source, binaries or both and how I can best provide them.

Thank you,
Carl

SEGGER J-Link V8.76 - Real time terminal output
SEGGER J-Link (unknown) V1.0, SN=1050724893
Process: JLink.exe
*** Booting nRF Connect SDK v3.2.0-5dcc6bd39b0f ***
*** Using Zephyr OS v4.2.99-a57ad913cf4e ***
[00:00:18.613,891] <wrn> bt_hci_core: Num of Controller's ISO packets != ISO bt_conn_tx contexts(3 != 5)
[00:00:18.619,567] <inf> bt_hci_core: HW Platform: Nordic Semiconductor (0x0002)
[00:00:18.619,598] <inf> bt_hci_core: HW Variant: nRF53x (0x0003)
[00:00:18.619,628] <inf> bt_hci_core: Firmware: Standard Bluetooth controller (0x00) Version 155.44175 Build 2923568579
[00:00:18.622,619] <inf> bt_hci_core: HCI transport: IPC
[00:00:18.622,802] <inf> bt_hci_core: Identity: C8:49:91:D2:14:14 (random)
[00:00:18.622,833] <inf> bt_hci_core: HCI: version 6.2 (0x10) revision 0x2020, manufacturer 0x0059
[00:00:18.622,863] <inf> bt_hci_core: LMP: version 6.2 (0x10) subver 0x2020
Bluetooth initialized
[00:00:18.622,985] <inf> lc3: LC3 initialized
Reset
Scanning for broadcast sources
Waiting for Broadcaster
addr 2C:E7:07:FB:0B:D4 (random), RSSI: -42
Found broadcaster with ID 0x123456 and addr 2C:E7:07:FB:0B:D4 (random) and sid 0x00
broadcaster_broadcast_id = 0x123456
Attempting to PA sync to the broadcaster with id 0x123456
Waiting for PA synced
PA sync 0x2000abb8 synced for broadcast sink with broadcast ID 0x123456
Broadcast source PA synced, creating Broadcast Sink
Broadcast Sink created, waiting for BASE
Received BASE with 1 subgroups from broadcast sink 0x2000b980
Channel allocation (subgroup level) 0x00000001
BIS index 0x00000001 allocation = 0x00000001
Broadcast sink (0x2000b980) is syncable, BIG not encrypted
BASE received, waiting for syncable
Waiting for broadcast code
Waiting for BIS sync request
Syncing to broadcast with bitfield: 0x00000001, stream_count = 1
Waiting for stream(s) started
Stream 0x2000588c connected
Stream 0x2000588c started with BIG_Handle 0 and BIS_Number 1
[00:00:30.840,942] <inf> lc3: Initializing the LC3 decoder with 10000 us duration and 16000 Hz frequency
[00:00:30.841,247] <inf> lc3: Initialized LC3 decoder for 0x2000588c
Broadcast sink 0x2000b980 started
Audio Relay initialized
Broadcast source created and started
Relay extended advertising started
Waiting for PA disconnected
***Source stream 0x20005534 started
[00:00:30.850,097] <inf> stream_rx: [1]: Incoming audio on stream 0x2000588c len 40, flags 0x09, seq_num 17377 and ts 12244507: Valid 1 | Error 0 | Loss 0 | Dup TS 0 | Dup PSN 0
[00:00:38.060,241] <inf> stream_rx: [721]: Incoming audio on stream 0x2000588c len 0, flags 0x0C, seq_num 18097 and ts 19444583: Valid 720 | Error 0 | Loss 1 | Dup TS 0 | Dup PSN 0
[00:00:40.840,179] <inf> stream_rx: [1000]: Incoming audio on stream 0x2000588c len 40, flags 0x09, seq_num 18376 and ts 22234615: Valid 999 | Error 0 | Loss 1 | Dup TS 0 | Dup PSN 0
[00:00:45.260,314] <inf> stream_rx: [1441]: Incoming audio on stream 0x2000588c len 0, flags 0x0C, seq_num 18817 and ts 26644661: Valid 1439 | Error 0 | Loss 2 | Dup TS 0 | Dup PSN 0
[00:00:50.840,362] <inf> stream_rx: [2000]: Incoming audio on stream 0x2000588c len 40, flags 0x09, seq_num 19376 and ts 32234722: Valid 1998 | Error 0 | Loss 2 | Dup TS 0 | Dup PSN 0
[00:00:52.460,601] <inf> stream_rx: [2161]: Incoming audio on stream 0x2000588c len 0, flags 0x0C, seq_num 19537 and ts 33844739: Valid 2158 | Error 0 | Loss 3 | Dup TS 0 | Dup PSN 0
[00:00:59.370,483] <inf> stream_rx: [2852]: Incoming audio on stream 0x2000588c len 0, flags 0x0C, seq_num 20228 and ts 40754813: Valid 2848 | Error 0 | Loss 4 | Dup TS 0 | Dup PSN 0
[00:00:59.660,491] <inf> stream_rx: [2881]: Incoming audio on stream 0x2000588c len 0, flags 0x0C, seq_num 20257 and ts 41044815: Valid 2876 | Error 0 | Loss 5 | Dup TS 0 | Dup PSN 0
[00:01:00.840,393] <inf> stream_rx: [3000]: Incoming audio on stream 0x2000588c len 40, flags 0x09, seq_num 20376 and ts 42234829: Valid 2995 | Error 0 | Loss 5 | Dup TS 0 | Dup PSN 0
[00:01:06.860,565] <inf> stream_rx: [3601]: Incoming audio on stream 0x2000588c len 0, flags 0x0C, seq_num 20977 and ts 48244894: Valid 3595 | Error 0 | Loss 6 | Dup TS 0 | Dup PSN 0
[00:01:10.840,515] <inf> stream_rx: [4000]: Incoming audio on stream 0x2000588c len 40, flags 0x09, seq_num 21376 and ts 52234936: Valid 3994 | Error 0 | Loss 6 | Dup TS 0 | Dup PSN 0
[00:01:14.060,638] <inf> stream_rx: [4321]: Incoming audio on stream 0x2000588c len 0, flags 0x0C, seq_num 21697 and ts 55444970: Valid 4314 | Error 0 | Loss 7 | Dup TS 0 | Dup PSN 0
[00:01:20.840,606] <inf> stream_rx: [5000]: Incoming audio on stream 0x2000588c len 40, flags 0x09, seq_num 22376 and ts 62235043: Valid 4993 | Error 0 | Loss 7 | Dup TS 0 | Dup PSN 0
[00:01:21.260,711] <inf> stream_rx: [5041]: Incoming audio on stream 0x2000588c len 0, flags 0x0C, seq_num 22417 and ts 62645047: Valid 5033 | Error 0 | Loss 8 | Dup TS 0 | Dup PSN 0
[00:01:28.460,784] <inf> stream_rx: [5761]: Incoming audio on stream 0x2000588c len 0, flags 0x0C, seq_num 23137 and ts 69845125: Valid 5752 | Error 0 | Loss 9 | Dup TS 0 | Dup PSN 0
[00:01:30.840,942] <inf> stream_rx: [6000]: Incoming audio on stream 0x2000588c len 40, flags 0x09, seq_num 23376 and ts 72235151: Valid 5991 | Error 0 | Loss 9 | Dup TS 0 | Dup PSN 0
[00:01:35.660,858] <inf> stream_rx: [6481]: Incoming audio on stream 0x2000588c len 0, flags 0x0C, seq_num 23857 and ts 77045203: Valid 6471 | Error 0 | Loss 10 | Dup TS 0 | Dup PSN 0
[00:01:40.840,820] <inf> stream_rx: [7000]: Incoming audio on stream 0x2000588c len 40, flags 0x09, seq_num 24376 and ts 82235258: Valid 6990 | Error 0 | Loss 10 | Dup TS 0 | Dup PSN 0
[00:01:42.860,931] <inf> stream_rx: [7201]: Incoming audio on stream 0x2000588c len 0, flags 0x0C, seq_num 24577 and ts 84245279: Valid 7190 | Error 0 | Loss 11 | Dup TS 0 | Dup PSN 0
[00:01:50.061,035] <inf> stream_rx: [7921]: Incoming audio on stream 0x2000588c len 0, flags 0x0C, seq_num 25297 and ts 91445357: Valid 7909 | Error 0 | Loss 12 | Dup TS 0 | Dup PSN 0
[00:01:50.840,942] <inf> stream_rx: [8000]: Incoming audio on stream 0x2000588c len 40, flags 0x09, seq_num 25376 and ts 92235365: Valid 7988 | Error 0 | Loss 12 | Dup TS 0 | Dup PSN 0
[00:01:57.261,108] <inf> stream_rx: [8641]: Incoming audio on stream 0x2000588c len 0, flags 0x0C, seq_num 26017 and ts 98645434: Valid 8628 | Error 0 | Loss 13 | Dup TS 0 | Dup PSN 0
[00:02:00.841,033] <inf> stream_rx: [9000]: Incoming audio on stream 0x2000588c len 40, flags 0x09, seq_num 26376 and ts 102235473: Valid 8987 | Error 0 | Loss 13 | Dup TS 0 | Dup PSN 0
[00:02:04.461,181] <inf> stream_rx: [9361]: Incoming audio on stream 0x2000588c len 0, flags 0x0C, seq_num 26737 and ts 105845512: Valid 9347 | Error 0 | Loss 14 | Dup TS 0 | Dup PSN 0
[00:02:10.841,125] <inf> stream_rx: [10000]: Incoming audio on stream 0x2000588c len 40, flags 0x09, seq_num 27376 and ts 112235580: Valid 9986 | Error 0 | Loss 14 | Dup TS 0 | Dup PSN 0
[00:02:11.661,254] <inf> stream_rx: [10081]: Incoming audio on stream 0x2000588c len 0, flags 0x0C, seq_num 27457 and ts 113045588: Valid 10066 | Error 0 | Loss 15 | Dup TS 0 | Dup PSN 0
[00:02:18.861,328] <inf> stream_rx: [10801]: Incoming audio on stream 0x2000588c len 0, flags 0x0C, seq_num 28177 and ts 120245666: Valid 10785 | Error 0 | Loss 16 | Dup TS 0 | Dup PSN 0
[00:02:20.841,247] <inf> stream_rx: [11000]: Incoming audio on stream 0x2000588c len 40, flags 0x09, seq_num 28376 and ts 122235688: Valid 10984 | Error 0 | Loss 16 | Dup TS 0 | Dup PSN 0
[00:02:26.061,401] <inf> stream_rx: [11521]: Incoming audio on stream 0x2000588c len 0, flags 0x0C, seq_num 28897 and ts 127445743: Valid 11504 | Error 0 | Loss 17 | Dup TS 0 | Dup PSN 0
[00:02:30.841,369] <inf> stream_rx: [12000]: Incoming audio on stream 0x2000588c len 40, flags 0x09, seq_num 29376 and ts 132235795: Valid 11983 | Error 0 | Loss 17 | Dup TS 0 | Dup PSN 0
[00:02:40.841,674] <inf> stream_rx: [13000]: Incoming audio on stream 0x2000588c len 40, flags 0x09, seq_num 30376 and ts 142235902: Valid 12983 | Error 0 | Loss 17 | Dup TS 0 | Dup PSN 0
[00:02:42.391,571] <inf> stream_rx: [13154]: Incoming audio on stream 0x2000588c len 0, flags 0x0C, seq_num 30530 and ts 143775918: Valid 13136 | Error 0 | Loss 18 | Dup TS 0 | Dup PSN 0
[00:02:50.841,583] <inf> stream_rx: [14000]: Incoming audio on stream 0x2000588c len 40, flags 0x09, seq_num 31376 and ts 152236009: Valid 13982 | Error 0 | Loss 18 | Dup TS 0 | Dup PSN 0
[00:03:00.841,705] <inf> stream_rx: [15000]: Incoming audio on stream 0x2000588c len 40, flags 0x09, seq_num 32376 and ts 162236115: Valid 14982 | Error 0 | Loss 18 | Dup TS 0 | Dup PSN 0
[00:03:10.841,796] <inf> stream_rx: [16000]: Incoming audio on stream 0x2000588c len 40, flags 0x09, seq_num 33376 and ts 172236223: Valid 15982 | Error 0 | Loss 18 | Dup TS 0 | Dup PSN 0
[00:03:20.841,918] <inf> stream_rx: [17000]: Incoming audio on stream 0x2000588c len 40, flags 0x09, seq_num 34376 and ts 182236330: Valid 16982 | Error 0 | Loss 18 | Dup TS 0 | Dup PSN 0
[00:03:30.842,010] <inf> stream_rx: [18000]: Incoming audio on stream 0x2000588c len 40, flags 0x09, seq_num 35376 and ts 192236438: Valid 17982 | Error 0 | Loss 18 | Dup TS 0 | Dup PSN 0
[00:03:40.842,132] <inf> stream_rx: [19000]: Incoming audio on stream 0x2000588c len 40, flags 0x09, seq_num 36376 and ts 202236545: Valid 18982 | Error 0 | Loss 18 | Dup TS 0 | Dup PSN 0
[00:03:50.842,224] <inf> stream_rx: [20000]: Incoming audio on stream 0x2000588c len 40, flags 0x09, seq_num 37376 and ts 212236653: Valid 19982 | Error 0 | Loss 18 | Dup TS 0 | Dup PSN 0
[00:04:00.842,346] <inf> stream_rx: [21000]: Incoming audio on stream 0x2000588c len 40, flags 0x09, seq_num 38376 and ts 222236759: Valid 20982 | Error 0 | Loss 18 | Dup TS 0 | Dup PSN 0
[00:04:10.842,437] <inf> stream_rx: [22000]: Incoming audio on stream 0x2000588c len 40, flags 0x09, seq_num 39376 and ts 232236867: Valid 21982 | Error 0 | Loss 18 | Dup TS 0 | Dup PSN 0
[00:04:20.842,559] <inf> stream_rx: [23000]: Incoming audio on stream 0x2000588c len 40, flags 0x09, seq_num 40376 and ts 242236974: Valid 22982 | Error 0 | Loss 18 | Dup TS 0 | Dup PSN 0
[00:04:30.842,651] <inf> stream_rx: [24000]: Incoming audio on stream 0x2000588c len 40, flags 0x09, seq_num 41376 and ts 252237081: Valid 23982 | Error 0 | Loss 18 | Dup TS 0 | Dup PSN 0
[00:04:40.842,773] <inf> stream_rx: [25000]: Incoming audio on stream 0x2000588c len 40, flags 0x09, seq_num 42376 and ts 262237189: Valid 24982 | Error 0 | Loss 18 | Dup TS 0 | Dup PSN 0
[00:04:50.842,864] <inf> stream_rx: [26000]: Incoming audio on stream 0x2000588c len 40, flags 0x09, seq_num 43376 and ts 272237296: Valid 25982 | Error 0 | Loss 18 | Dup TS 0 | Dup PSN 0
[00:05:00.842,987] <inf> stream_rx: [27000]: Incoming audio on stream 0x2000588c len 40, flags 0x09, seq_num 44376 and ts 282237403: Valid 26982 | Error 0 | Loss 18 | Dup TS 0 | Dup PSN 0
[00:05:10.843,078] <inf> stream_rx: [28000]: Incoming audio on stream 0x2000588c len 40, flags 0x09, seq_num 45376 and ts 292237510: Valid 27982 | Error 0 | Loss 18 | Dup TS 0 | Dup PSN 0
[00:05:20.843,200] <inf> stream_rx: [29000]: Incoming audio on stream 0x2000588c len 40, flags 0x09, seq_num 46376 and ts 302237617: Valid 28982 | Error 0 | Loss 18 | Dup TS 0 | Dup PSN 0
[00:05:30.843,292] <inf> stream_rx: [30000]: Incoming audio on stream 0x2000588c len 40, flags 0x09, seq_num 47376 and ts 312237725: Valid 29982 | Error 0 | Loss 18 | Dup TS 0 | Dup PSN 0
[00:05:40.843,414] <inf> stream_rx: [31000]: Incoming audio on stream 0x2000588c len 40, flags 0x09, seq_num 48376 and ts 322237832: Valid 30982 | Error 0 | Loss 18 | Dup TS 0 | Dup PSN 0
[00:05:50.843,505] <inf> stream_rx: [32000]: Incoming audio on stream 0x2000588c len 40, flags 0x09, seq_num 49376 and ts 332237939: Valid 31982 | Error 0 | Loss 18 | Dup TS 0 | Dup PSN 0
[00:06:00.843,627] <inf> stream_rx: [33000]: Incoming audio on stream 0x2000588c len 40, flags 0x09, seq_num 50376 and ts 342238046: Valid 32982 | Error 0 | Loss 18 | Dup TS 0 | Dup PSN 0
[00:06:10.843,719] <inf> stream_rx: [34000]: Incoming audio on stream 0x2000588c len 40, flags 0x09, seq_num 51376 and ts 352238154: Valid 33982 | Error 0 | Loss 18 | Dup TS 0 | Dup PSN 0
[00:06:20.843,841] <inf> stream_rx: [35000]: Incoming audio on stream 0x2000588c len 40, flags 0x09, seq_num 52376 and ts 362238261: Valid 34982 | Error 0 | Loss 18 | Dup TS 0 | Dup PSN 0
[00:06:30.843,933] <inf> stream_rx: [36000]: Incoming audio on stream 0x2000588c len 40, flags 0x09, seq_num 53376 and ts 372238368: Valid 35982 | Error 0 | Loss 18 | Dup TS 0 | Dup PSN 0
[00:06:40.844,055] <inf> stream_rx: [37000]: Incoming audio on stream 0x2000588c len 40, flags 0x09, seq_num 54376 and ts 382238475: Valid 36982 | Error 0 | Loss 18 | Dup TS 0 | Dup PSN 0
[00:06:50.844,146] <inf> stream_rx: [38000]: Incoming audio on stream 0x2000588c len 40, flags 0x09, seq_num 55376 and ts 392238582: Valid 37982 | Error 0 | Loss 18 | Dup TS 0 | Dup PSN 0
[00:06:53.994,293] <inf> stream_rx: [38314]: Incoming audio on stream 0x2000588c len 0, flags 0x0C, seq_num 55690 and ts 395378616: Valid 38295 | Error 0 | Loss 19 | Dup TS 0 | Dup PSN 0
[00:07:00.844,268] <inf> stream_rx: [39000]: Incoming audio on stream 0x2000588c len 40, flags 0x09, seq_num 56376 and ts 402238689: Valid 38981 | Error 0 | Loss 19 | Dup TS 0 | Dup PSN 0
[00:07:10.844,360] <inf> stream_rx: [40000]: Incoming audio on stream 0x2000588c len 40, flags 0x09, seq_num 57376 and ts 412238796: Valid 39981 | Error 0 | Loss 19 | Dup TS 0 | Dup PSN 0
[00:07:20.844,482] <inf> stream_rx: [41000]: Incoming audio on stream 0x2000588c len 40, flags 0x09, seq_num 58376 and ts 422238904: Valid 40981 | Error 0 | Loss 19 | Dup TS 0 | Dup PSN 0
[00:07:30.844,573] <inf> stream_rx: [42000]: Incoming audio on stream 0x2000588c len 40, flags 0x09, seq_num 59376 and ts 432239010: Valid 41981 | Error 0 | Loss 19 | Dup TS 0 | Dup PSN 0
[00:07:40.844,696] <inf> stream_rx: [43000]: Incoming audio on stream 0x2000588c len 40, flags 0x09, seq_num 60376 and ts 442239119: Valid 42981 | Error 0 | Loss 19 | Dup TS 0 | Dup PSN 0
[00:07:50.844,787] <inf> stream_rx: [44000]: Incoming audio on stream 0x2000588c len 40, flags 0x09, seq_num 61376 and ts 452239225: Valid 43981 | Error 0 | Loss 19 | Dup TS 0 | Dup PSN 0
[00:08:00.844,909] <inf> stream_rx: [45000]: Incoming audio on stream 0x2000588c len 40, flags 0x09, seq_num 62376 and ts 462239332: Valid 44981 | Error 0 | Loss 19 | Dup TS 0 | Dup PSN 0
[00:08:10.845,001] <inf> stream_rx: [46000]: Incoming audio on stream 0x2000588c len 40, flags 0x09, seq_num 63376 and ts 472239440: Valid 45981 | Error 0 | Loss 19 | Dup TS 0 | Dup PSN 0
[00:08:20.845,123] <inf> stream_rx: [47000]: Incoming audio on stream 0x2000588c len 40, flags 0x09, seq_num 64376 and ts 482239547: Valid 46981 | Error 0 | Loss 19 | Dup TS 0 | Dup PSN 0
[00:08:30.845,214] <inf> stream_rx: [48000]: Incoming audio on stream 0x2000588c len 40, flags 0x09, seq_num 65376 and ts 492239654: Valid 47981 | Error 0 | Loss 19 | Dup TS 0 | Dup PSN 0
[00:08:40.845,336] <inf> stream_rx: [49000]: Incoming audio on stream 0x2000588c len 40, flags 0x09, seq_num 840 and ts 502239760: Valid 48981 | Error 0 | Loss 19 | Dup TS 0 | Dup PSN 0
[00:08:50.845,428] <inf> stream_rx: [50000]: Incoming audio on stream 0x2000588c len 40, flags 0x09, seq_num 1840 and ts 512239868: Valid 49981 | Error 0 | Loss 19 | Dup TS 0 | Dup PSN 0
[00:08:57.725,585] <inf> stream_rx: [50687]: Incoming audio on stream 0x2000588c len 0, flags 0x0C, seq_num 2527 and ts 519109942: Valid 50667 | Error 0 | Loss 20 | Dup TS 0 | Dup PSN 0
[00:09:00.845,550] <inf> stream_rx: [51000]: Incoming audio on stream 0x2000588c len 40, flags 0x09, seq_num 2840 and ts 522239975: Valid 50980 | Error 0 | Loss 20 | Dup TS 0 | Dup PSN 0
[00:09:10.845,642] <inf> stream_rx: [52000]: Incoming audio on stream 0x2000588c len 40, flags 0x09, seq_num 3840 and ts 532240082: Valid 51980 | Error 0 | Loss 20 | Dup TS 0 | Dup PSN 0
[00:09:15.005,798] <inf> stream_rx: [52415]: Incoming audio on stream 0x2000588c len 0, flags 0x0C, seq_num 4255 and ts 536390127: Valid 52394 | Error 0 | Loss 21 | Dup TS 0 | Dup PSN 0
[00:09:20.845,764] <inf> stream_rx: [53000]: Incoming audio on stream 0x2000588c len 40, flags 0x09, seq_num 4840 and ts 542240189: Valid 52979 | Error 0 | Loss 21 | Dup TS 0 | Dup PSN 0
[00:09:30.845,886] <inf> stream_rx: [54000]: Incoming audio on stream 0x2000588c len 40, flags 0x09, seq_num 5840 and ts 552240297: Valid 53979 | Error 0 | Loss 21 | Dup TS 0 | Dup PSN 0
[00:09:32.285,980] <inf> stream_rx: [54143]: Incoming audio on stream 0x2000588c len 0, flags 0x0C, seq_num 5983 and ts 553670312: Valid 54121 | Error 0 | Loss 22 | Dup TS 0 | Dup PSN 0
[00:09:40.845,977] <inf> stream_rx: [55000]: Incoming audio on stream 0x2000588c len 40, flags 0x09, seq_num 6840 and ts 562240404: Valid 54978 | Error 0 | Loss 22 | Dup TS 0 | Dup PSN 0
[00:09:49.566,131] <inf> stream_rx: [55871]: Incoming audio on stream 0x2000588c len 0, flags 0x0C, seq_num 7711 and ts 570950496: Valid 55848 | Error 0 | Loss 23 | Dup TS 0 | Dup PSN 0
[00:09:50.846,069] <inf> stream_rx: [56000]: Incoming audio on stream 0x2000588c len 40, flags 0x09, seq_num 7840 and ts 572240510: Valid 55977 | Error 0 | Loss 23 | Dup TS 0 | Dup PSN 0
[00:10:00.846,191] <inf> stream_rx: [57000]: Incoming audio on stream 0x2000588c len 40, flags 0x09, seq_num 8840 and ts 582240618: Valid 56977 | Error 0 | Loss 23 | Dup TS 0 | Dup PSN 0
[00:10:06.846,343] <inf> stream_rx: [57599]: Incoming audio on stream 0x2000588c len 0, flags 0x0C, seq_num 9439 and ts 588230681: Valid 57575 | Error 0 | Loss 24 | Dup TS 0 | Dup PSN 0
[00:10:10.846,282] <inf> stream_rx: [58000]: Incoming audio on stream 0x2000588c len 40, flags 0x09, seq_num 9840 and ts 592240724: Valid 57976 | Error 0 | Loss 24 | Dup TS 0 | Dup PSN 0
[00:10:20.846,405] <inf> stream_rx: [59000]: Incoming audio on stream 0x2000588c len 40, flags 0x09, seq_num 10840 and ts 602240833: Valid 58976 | Error 0 | Loss 24 | Dup TS 0 | Dup PSN 0
[00:10:24.126,525] <inf> stream_rx: [59327]: Incoming audio on stream 0x2000588c len 0, flags 0x0C, seq_num 11167 and ts 605510867: Valid 59302 | Error 0 | Loss 25 | Dup TS 0 | Dup PSN 0
[00:10:30.846,496] <inf> stream_rx: [60000]: Incoming audio on stream 0x2000588c len 40, flags 0x09, seq_num 11840 and ts 612240940: Valid 59975 | Error 0 | Loss 25 | Dup TS 0 | Dup PSN 0
[00:10:40.846,618] <inf> stream_rx: [61000]: Incoming audio on stream 0x2000588c len 40, flags 0x09, seq_num 12840 and ts 622241046: Valid 60975 | Error 0 | Loss 25 | Dup TS 0 | Dup PSN 0
[00:10:41.406,707] <inf> stream_rx: [61055]: Incoming audio on stream 0x2000588c len 0, flags 0x0C, seq_num 12895 and ts 622791052: Valid 61029 | Error 0 | Loss 26 | Dup TS 0 | Dup PSN 0
[00:10:50.846,710] <inf> stream_rx: [62000]: Incoming audio on stream 0x2000588c len 40, flags 0x09, seq_num 13840 and ts 632241154: Valid 61974 | Error 0 | Loss 26 | Dup TS 0 | Dup PSN 0
[00:10:58.686,889] <inf> stream_rx: [62783]: Incoming audio on stream 0x2000588c len 0, flags 0x0C, seq_num 14623 and ts 640071238: Valid 62756 | Error 0 | Loss 27 | Dup TS 0 | Dup PSN 0
[00:11:00.846,832] <inf> stream_rx: [63000]: Incoming audio on stream 0x2000588c len 40, flags 0x09, seq_num 14840 and ts 642241261: Valid 62973 | Error 0 | Loss 27 | Dup TS 0 | Dup PSN 0
[00:11:10.846,923] <inf> stream_rx: [64000]: Incoming audio on stream 0x2000588c len 40, flags 0x09, seq_num 15840 and ts 652241369: Valid 63973 | Error 0 | Loss 27 | Dup TS 0 | Dup PSN 0
[00:11:15.967,071] <inf> stream_rx: [64511]: Incoming audio on stream 0x2000588c len 0, flags 0x0C, seq_num 16351 and ts 657351422: Valid 64483 | Error 0 | Loss 28 | Dup TS 0 | Dup PSN 0
[00:11:20.847,045] <inf> stream_rx: [65000]: Incoming audio on stream 0x2000588c len 40, flags 0x09, seq_num 16840 and ts 662241475: Valid 64972 | Error 0 | Loss 28 | Dup TS 0 | Dup PSN 0
[00:11:30.847,137] <inf> stream_rx: [66000]: Incoming audio on stream 0x2000588c len 40, flags 0x09, seq_num 17840 and ts 672241582: Valid 65972 | Error 0 | Loss 28 | Dup TS 0 | Dup PSN 0
[00:11:33.247,253] <inf> stream_rx: [66239]: Incoming audio on stream 0x2000588c len 0, flags 0x0C, seq_num 18079 and ts 674631607: Valid 66210 | Error 0 | Loss 29 | Dup TS 0 | Dup PSN 0
[00:11:40.847,259] <inf> stream_rx: [67000]: Incoming audio on stream 0x2000588c len 40, flags 0x09, seq_num 18840 and ts 682241690: Valid 66971 | Error 0 | Loss 29 | Dup TS 0 | Dup PSN 0
[00:11:50.527,435] <inf> stream_rx: [67967]: Incoming audio on stream 0x2000588c len 0, flags 0x0C, seq_num 19807 and ts 691911792: Valid 67937 | Error 0 | Loss 30 | Dup TS 0 | Dup PSN 0
[00:11:50.847,351] <inf> stream_rx: [68000]: Incoming audio on stream 0x2000588c len 40, flags 0x09, seq_num 19840 and ts 692241797: Valid 67970 | Error 0 | Loss 30 | Dup TS 0 | Dup PSN 0
[00:11:52.917,541] <inf> stream_rx: [68205]: Incoming audio on stream 0x2000588c len 0, flags 0x0C, seq_num 20045 and ts 694291818: Valid 68174 | Error 0 | Loss 31 | Dup TS 0 | Dup PSN 0
[00:11:52.917,816] <inf> stream_rx: [68206]: Incoming audio on stream 0x2000588c len 0, flags 0x0C, seq_num 20046 and ts 694301818: Valid 68174 | Error 0 | Loss 32 | Dup TS 0 | Dup PSN 0
[00:11:53.067,443] <inf> stream_rx: [68221]: Incoming audio on stream 0x2000588c len 0, flags 0x0C, seq_num 20061 and ts 694451820: Valid 68188 | Error 0 | Loss 33 | Dup TS 0 | Dup PSN 0
[00:11:55.057,464] <inf> stream_rx: [68420]: Incoming audio on stream 0x2000588c len 0, flags 0x0C, seq_num 20260 and ts 696441841: Valid 68386 | Error 0 | Loss 34 | Dup TS 0 | Dup PSN 0
[00:12:00.587,524] <inf> stream_rx: [68973]: Incoming audio on stream 0x2000588c len 0, flags 0x0C, seq_num 20813 and ts 701971901: Valid 68938 | Error 0 | Loss 35 | Dup TS 0 | Dup PSN 0
[00:12:00.847,442] <inf> stream_rx: [69000]: Incoming audio on stream 0x2000588c len 40, flags 0x09, seq_num 20840 and ts 702241904: Valid 68965 | Error 0 | Loss 35 | Dup TS 0 | Dup PSN 0
[00:12:01.407,531] <inf> stream_rx: [69055]: Incoming audio on stream 0x2000588c len 0, flags 0x0C, seq_num 20895 and ts 702791909: Valid 69019 | Error 0 | Loss 36 | Dup TS 0 | Dup PSN 0
[00:12:01.577,514] <inf> stream_rx: [69072]: Incoming audio on stream 0x2000588c len 0, flags 0x0C, seq_num 20912 and ts 702961912: Valid 69035 | Error 0 | Loss 37 | Dup TS 0 | Dup PSN 0
[00:12:06.287,597] <inf> stream_rx: [69543]: Incoming audio on stream 0x2000588c len 0, flags 0x0C, seq_num 21383 and ts 707671962: Valid 69505 | Error 0 | Loss 38 | Dup TS 0 | Dup PSN 0
[00:12:07.807,586] <inf> stream_rx: [69695]: Incoming audio on stream 0x2000588c len 0, flags 0x0C, seq_num 21535 and ts 709191978: Valid 69656 | Error 0 | Loss 39 | Dup TS 0 | Dup PSN 0
[00:12:10.847,564] <inf> stream_rx: [70000]: Incoming audio on stream 0x2000588c len 40, flags 0x09, seq_num 21840 and ts 712242011: Valid 69961 | Error 0 | Loss 39 | Dup TS 0 | Dup PSN 0
[00:12:11.237,640] <inf> stream_rx: [70038]: Incoming audio on stream 0x2000588c len 0, flags 0x0C, seq_num 21878 and ts 712622015: Valid 69998 | Error 0 | Loss 40 | Dup TS 0 | Dup PSN 0
[00:12:14.377,838] <inf> stream_rx: [70352]: Incoming audio on stream 0x2000588c len 0, flags 0x0C, seq_num 22192 and ts 715762048: Valid 70311 | Error 0 | Loss 41 | Dup TS 0 | Dup PSN 0
[00:12:15.027,862] <inf> stream_rx: [70417]: Incoming audio on stream 0x2000588c len 0, flags 0x0C, seq_num 22257 and ts 716412056: Valid 70375 | Error 0 | Loss 42 | Dup TS 0 | Dup PSN 0
[00:12:16.287,872] <inf> stream_rx: [70543]: Incoming audio on stream 0x2000588c len 0, flags 0x0C, seq_num 22383 and ts 717672069: Valid 70500 | Error 0 | Loss 43 | Dup TS 0 | Dup PSN 0
[00:12:16.937,866] <inf> stream_rx: [70608]: Incoming audio on stream 0x2000588c len 0, flags 0x0C, seq_num 22448 and ts 718322077: Valid 70564 | Error 0 | Loss 44 | Dup TS 0 | Dup PSN 0
[00:12:19.087,890] <inf> stream_rx: [70823]: Incoming audio on stream 0x2000588c len 0, flags 0x0C, seq_num 22663 and ts 720472100: Valid 70778 | Error 0 | Loss 45 | Dup TS 0 | Dup PSN 0
[00:12:19.497,894] <inf> stream_rx: [70864]: Incoming audio on stream 0x2000588c len 0, flags 0x0C, seq_num 22704 and ts 720882104: Valid 70818 | Error 0 | Loss 46 | Dup TS 0 | Dup PSN 0
[00:12:20.847,656] <inf> stream_rx: [71000]: Incoming audio on stream 0x2000588c len 40, flags 0x09, seq_num 22840 and ts 722242118: Valid 70954 | Error 0 | Loss 46 | Dup TS 0 | Dup PSN 0
[00:12:21.238,067] <inf> stream_rx: [71038]: Incoming audio on stream 0x2000588c len 0, flags 0x0C, seq_num 22878 and ts 722622122: Valid 70991 | Error 0 | Loss 47 | Dup TS 0 | Dup PSN 0
[00:12:24.618,041] <inf> stream_rx: [71376]: Incoming audio on stream 0x2000588c len 0, flags 0x0C, seq_num 23216 and ts 726002158: Valid 71328 | Error 0 | Loss 48 | Dup TS 0 | Dup PSN 0
[00:12:25.088,073] <inf> stream_rx: [71423]: Incoming audio on stream 0x2000588c len 0, flags 0x0C, seq_num 23263 and ts 726472164: Valid 71374 | Error 0 | Loss 49 | Dup TS 0 | Dup PSN 0
[00:12:25.837,890] <inf> stream_rx: [71498]: Incoming audio on stream 0x2000588c len 0, flags 0x0C, seq_num 23338 and ts 727222173: Valid 71448 | Error 0 | Loss 50 | Dup TS 0 | Dup PSN 0
[00:12:25.857,879] <inf> stream_rx: [71500]: Incoming audio on stream 0x2000588c len 0, flags 0x0C, seq_num 23340 and ts 727242172: Valid 71449 | Error 0 | Loss 51 | Dup TS 0 | Dup PSN 0
[00:12:25.877,899] <inf> stream_rx: [71502]: Incoming audio on stream 0x2000588c len 0, flags 0x0C, seq_num 23342 and ts 727262172: Valid 71450 | Error 0 | Loss 52 | Dup TS 0 | Dup PSN 0
[00:12:25.897,888] <inf> stream_rx: [71504]: Incoming audio on stream 0x2000588c len 0, flags 0x0C, seq_num 23344 and ts 727282172: Valid 71451 | Error 0 | Loss 53 | Dup TS 0 | Dup PSN 0
[00:12:25.917,877] <inf> stream_rx: [71506]: Incoming audio on stream 0x2000588c len 0, flags 0x0C, seq_num 23346 and ts 727302173: Valid 71452 | Error 0 | Loss 54 | Dup TS 0 | Dup PSN 0
[00:12:25.937,896] <inf> stream_rx: [71508]: Incoming audio on stream 0x2000588c len 0, flags 0x0C, seq_num 23348 and ts 727322174: Valid 71453 | Error 0 | Loss 55 | Dup TS 0 | Dup PSN 0
[00:12:25.957,885] <inf> stream_rx: [71510]: Incoming audio on stream 0x2000588c len 0, flags 0x0C, seq_num 23350 and ts 727342174: Valid 71454 | Error 0 | Loss 56 | Dup TS 0 | Dup PSN 0
[00:12:25.977,874] <inf> stream_rx: [71512]: Incoming audio on stream 0x2000588c len 0, flags 0x0C, seq_num 23352 and ts 727362173: Valid 71455 | Error 0 | Loss 57 | Dup TS 0 | Dup PSN 0
[00:12:25.997,894] <inf> stream_rx: [71514]: Incoming audio on stream 0x2000588c len 0, flags 0x0C, seq_num 23354 and ts 727382173: Valid 71456 | Error 0 | Loss 58 | Dup TS 0 | Dup PSN 0
[00:12:26.017,883] <

RE: LE audio: Simultaneous Broadcast Sink and Broadcast Source

droid — Wed, 01 Apr 2026 19:45:49 GMT

Hello Maria,

Thank you for the offer. I will try to create a simple example using NCS samples that reproduces the issue.

RE: LE audio: Simultaneous Broadcast Sink and Broadcast Source

Maria Gilje — Thu, 26 Mar 2026 15:01:09 GMT

Hi Carl,

Thank you for describing your usecase more. I agree that your application is important and we will do what we can to help you towards an application which works as you expect it to. In our documentation for the SoftDevice Controller it is described that the controller supports scanning and advertising simultaneously. You would need to fine tune the parameters for a smooth sound experience though. I recommend that you check out the following documentation:

Broadcast isochronous channels timing from the SoftDevice Controller scheduling documentation

LE isochronous channels

In the Broadcast isochronous channels timing section, there is also a parameter selection visualization which can help to optimize your parameters to allow for enough time for scanning while also broadcasting.

Using a professional sniffer can also be helpful while trying to fine tune parameters, as collisions will be visible there. We have a professional sniffer available and can run test applications on our side if you provide the firmware for us to test.

Best regards,

Maria

RE: LE audio: Simultaneous Broadcast Sink and Broadcast Source

Simonr — Tue, 24 Mar 2026 12:07:06 GMT

Sorry about the late reply, Maria will be back on Thursday to follow-up on this ticket.

Thank you for your patience,

Simon

RE: LE audio: Simultaneous Broadcast Sink and Broadcast Source

droid — Thu, 19 Mar 2026 17:43:01 GMT

Hello Maria,

The use case is an important one: Range Extension. The Broadcast Receiver can use the co-located Broadcast Source to re-transmit ("relay") received audio to other Broadcast Sinks, which may be located farther away from the original Broadcast Source. This procedure can be repeated multiple times, and/or with multiple Broadcast Sinks at each stage to further extend the range. As encoded frames are not decoded or re-encoded, this can also be quite efficient.

Examples:

- Original Broadcaster is located in a large building with many interior walls, and broadcast audio cannot be directly received at throughout building. Broadcast Sink(s) co-located with Broadcast Source(s) ("relays") can be placed at one or more interior points within building to re-transmit audio so that the distance from any Broadcast Source ("relay") to any Broadcast Sink is within transmission range.

- Original Broadcaster is located outdoors e.g. in an urban environment with many buildings which block RF signals. Broadcast Sink(s) co-located with Broadcast Source(s) ("relays") can be placed at corners, enabling audio reception "around" buildings.

In order for the above to work, nRF5340s would need to function simultaneously in Broadcast Sink and Broadcast Source roles. The change in roles would need to be supported in real-time without reboot or re-configuration.

This is a Broadcast-only application, so Unicast cannot be used.

It is interesting that this configuration does function correctly (for some tens of minutes) before failing. It is possible there are packet collisions (since timing of received packets is controlled by remote Broadcast Source and not local Broadcast Sink) but perhaps these need not be fatal. There may be other reasons as well. Perhaps some changes in audio stream definition (bandwidth, latency, retransmit count, etc.) and/or SD Controller configuration could be used to improve the results. We appreciate any insight or suggestions you may be able to provide.

Thank you,

Carl

RE: LE audio: Simultaneous Broadcast Sink and Broadcast Source

Maria Gilje — Thu, 19 Mar 2026 13:21:22 GMT

Hi Carl,

It is possible for the SoftDecive Controller to support both a broadcaster and a receiver role, but I'm not quite sure if it is feasible to do so simultaneously. Could you please explain a bit more about your usecase? Is it necessary for the device to have the roles simultaneously or could it switch between them? Would it be an option for it to be a broadcast source and a unicast server?

Best regards,

Maria