diff --git a/rtcllm/rtc.py b/rtcllm/rtc.py
index d8bea47..276e037 100644
--- a/rtcllm/rtc.py
+++ b/rtcllm/rtc.py
@@ -75,7 +75,7 @@ class RTCLLM:
 		peer = self.peers[peerid]
 		pc = peer.pc
 		if track.kind == 'audio':
-			vadtrack = AudioTrackVad(track, onvoiceend=self.vad_voiceend)
+			vadtrack = AudioTrackVad(track, stage=3, onvoiceend=self.vad_voiceend)
 			peer.vadtrack = vadtrack
 			vadtrack.start_vad()
 
@@ -103,7 +103,7 @@ class RTCLLM:
 		if pc is None:
 			print(f'{self.peers=}, {data=}')
 			return
-		pc.on("connectionState", partial(self.pc_connectionState_changed, data['from'].id))
+		pc.on("connectionstate", partial(self.pc_connectionState_changed, data['from'].id))
 		pc.on('track', partial(self.pc_track, data['from'].id))
 		pc.on('icecandidate', partial(self.on_icecandidate, pc))
 		offer = RTCSessionDescription(** data.offer)
diff --git a/rtcllm/vad.py b/rtcllm/vad.py
index 4bd2021..dd60c0c 100644
--- a/rtcllm/vad.py
+++ b/rtcllm/vad.py
@@ -1,10 +1,14 @@
+from traceback import print_exc
 import asyncio
 import collections
 import contextlib
+from appPublic.folderUtils import temp_file
 from aiortc import MediaStreamTrack
 from aiortc.contrib.media import MediaBlackhole, MediaPlayer, MediaRecorder, MediaRelay
 import webrtcvad
 import wave
+import numpy as np
+from av import AudioLayout, AudioResampler, AudioFrame, AudioFormat
 
 class AudioTrackVad(MediaStreamTrack):
 	def __init__(self, track, stage=3, onvoiceend=None):
@@ -17,12 +21,13 @@ class AudioTrackVad(MediaStreamTrack):
 		# frameSize = self.track.getSettings().frameSize
 		# self.frame_duration_ms = (1000 * frameSize) / self.sample_rate
 		self.frame_duration_ms = 0.00008
-		self.num_padding_frames = 10
+		self.num_padding_frames = 20
 		self.ring_buffer = collections.deque(maxlen=self.num_padding_frames)
 		self.triggered = False
 		self.voiced_frames = []
 		self.loop = asyncio.get_event_loop()
 		self.task = None
+		self.debug = True
 		self.running = False
 
 	def start_vad(self):
@@ -31,22 +36,47 @@ class AudioTrackVad(MediaStreamTrack):
 	
 	def _recv(self):
 		asyncio.create_task(self.recv())
-		if self.task:
-			self.task.cancel()
-		if self.running:
-			self.task = self.loop.call_later(self.frame_duration_ms, self._recv)
 
 	def stop(self):
 		self.running = False
 
+	def frame2bytes(self, frame):
+		# 假设你有一个 AudioFrame 对象 audio_frame
+		audio_array = frame.to_ndarray()
+		# 将 numpy 数组转换为字节数组
+		dtype = audio_array.dtype
+		audio_bytes = audio_array.tobytes()
+		return audio_bytes
+
 	async def recv(self):
-		f = await self.track.recv()
-		print(f'{f.pts=}, {f.rate=}, {f.sample_rate=}, {f.format=}, {f.dts=}, {f.samples=}')
-		self.vad_check(f)
+		oldf = await self.track.recv()
+		frames = self.resample(oldf)
+		for f in frames:
+			if self.debug:
+				self.debug = False
+				print(f'{type(f)}, {f.samples=}, {f.format.bytes=}, {f.sample_rate=}, {f.format=}, {f.is_corrupt=}, {f.layout=}, {f.planes=}, {f.side_data=}')
+			self.sample_rate = f.sample_rate
+			try:
+				await self.vad_check(f)
+			except Exception as e:
+				print(f'{e=}')
+				print_exc()
+				return
+		if self.task:
+			self.task.cancel()
+		if self.running:
+			self.task = self.loop.call_later(self.frame_duration_ms, self._recv)
 		return f
 	
+	def resample(self, frame):
+		fmt = AudioFormat('s16')
+		al = AudioLayout(1)
+		r = AudioResampler(format=fmt, layout=al, rate=frame.rate)
+		frame = r.resample(frame)
+		return frame
+
 	async def vad_check(self, frame):
-		is_speech = self.vad.is_speech(frame, self.sample_rate)
+		is_speech = self.vad.is_speech(self.frame2bytes(frame), self.sample_rate)
 		if not self.triggered:
 			self.ring_buffer.append((frame, is_speech))
 			num_voiced = len([f for f, speech in self.ring_buffer if speech])
@@ -61,6 +91,7 @@ class AudioTrackVad(MediaStreamTrack):
 				for f, s in self.ring_buffer:
 					self.voiced_frames.append(f)
 				self.ring_buffer.clear()
+				print('start voice .....', len(self.voiced_frames))
 		else:
 			# We're in the TRIGGERED state, so collect the audio data
 			# and add it to the ring buffer.
@@ -72,23 +103,28 @@ class AudioTrackVad(MediaStreamTrack):
 			# audio we've collected.
 			if num_unvoiced > 0.9 * self.ring_buffer.maxlen:
 				self.triggered = False
-				audio_data =  b''.join([f.bytes for f in voiced_frames])
-				self.write_wave(audio_data)
+				audio_data =  b''.join([self.frame2bytes(f) for f in self.voiced_frames])
+				await self.write_wave(audio_data)
 				self.ring_buffer.clear()
-				voiced_frames = []
+				self.voiced_frames = []
+				print('end voice .....', len(self.voiced_frames))
 
 	async def write_wave(self, audio_data):
 		"""Writes a .wav file.
 
 		Takes path, PCM audio data, and sample rate.
 		"""
-		path = make_temp(subfix='.wav')
+		path = temp_file(suffix='.wav')
+		print(f'temp_file={path}')
+
 		with contextlib.closing(wave.open(path, 'wb')) as wf:
 			wf.setnchannels(1)
 			wf.setsampwidth(2)
 			wf.setframerate(self.sample_rate)
-			wf.writeframes(audio)
+			wf.writeframes(audio_data)
 		
+		print('************wrote*******')
 		if self.onvoiceend:
 			await self.onvoiceend(path)
+		print('************over*******')