diff --git a/apps/auracast.py b/apps/auracast.py
index 77e58ed4..9ef87da5 100644
--- a/apps/auracast.py
+++ b/apps/auracast.py
@@ -965,6 +965,11 @@ async def run_transmit(
                 bumble.device.IsoPacketStream(big.bis_links[1], 64),
             ]
 
+            for queue in iso_queues:
+                await queue.iso_link.setup_data_path(
+                    direction=queue.iso_link.Direction.HOST_TO_CONTROLLER
+            )
+
             def on_flow():
                 data_packet_queue = iso_queues[0].data_packet_queue
                 print(