diff --git a/engine/core/duplex_pipeline.py b/engine/core/duplex_pipeline.py
index 3fe5e26..06052b0 100644
--- a/engine/core/duplex_pipeline.py
+++ b/engine/core/duplex_pipeline.py
@@ -70,7 +70,7 @@ class DuplexPipeline:
     TRACK_AUDIO_OUT = "audio_out"
     TRACK_CONTROL = "control"
     _PCM_FRAME_BYTES = 640  # 16k mono pcm_s16le, 20ms
-    _ASR_DELTA_THROTTLE_MS = 300
+    _ASR_DELTA_THROTTLE_MS = 500
     _LLM_DELTA_THROTTLE_MS = 80
     _ASR_CAPTURE_MAX_MS = 15000
     _DEFAULT_TOOL_SCHEMAS: Dict[str, Dict[str, Any]] = {