diff --git a/server/src/agent.py b/server/src/agent.py
index 0b03fa3..7ef7da9 100644
--- a/server/src/agent.py
+++ b/server/src/agent.py
@@ -104,6 +104,7 @@ async def start(
         # )
 
         parameters = {
+            "audio_scenario": "chorus",  # web client → ultra-low-latency chorus profile
             "data_channel": "rtm",
             "enable_error_message": True,
             "enable_metrics": True,