diff --git a/rtcllm/rtc.py b/rtcllm/rtc.py
index a79724a..90bfd79 100644
--- a/rtcllm/rtc.py
+++ b/rtcllm/rtc.py
@@ -119,7 +119,7 @@ class RTCLLM:
 		pc = peer.pc
 		if track.kind == 'audio':
 			f = partial(self.vad_voiceend, peer)
-			vadtrack = AudioTrackVad(track, stage=0, onvoiceend=f)
+			vadtrack = AudioTrackVad(track, stage=2, onvoiceend=f)
 			peer.vadtrack = vadtrack
 			vadtrack.start_vad()
 
diff --git a/rtcllm/stt.py b/rtcllm/stt.py
index 711a2db..67e3fdd 100644
--- a/rtcllm/stt.py
+++ b/rtcllm/stt.py
@@ -39,13 +39,13 @@ async def asr(a_file):
 	r = None
 	with open(a_file, 'rb') as f:
 		oc  = OAuthClient(DictObject(**opts))
-		r = await oc('http://open-computing.cn', 'asr', {'audio_file':f})
+		r = await oc('https://open-computing.cn', 'asr', {'audio_file':f})
 		print(f'{r=}')
 	return r
 
 	with open(a_file, 'rb') as f:
 		async with aiohttp.ClientSession() as session:
-			async with session.post("http://open-computing.cn/asr/generate", data={
+			async with session.post("https://open-computing.cn/asr/generate", data={
 				"model":"whisper",
 				"audio_file":f
 			}) as response: