diff --git a/rtcllm/vad.py b/rtcllm/vad.py
index eceb620..b35fd61 100644
--- a/rtcllm/vad.py
+++ b/rtcllm/vad.py
@@ -157,28 +157,13 @@ class AudioTrackVad(MediaStreamTrack):
 	def stop(self):
 		self.running = False
 
-	def to16000_160_frames(self, frame):
-		frames = resample(frame, sample_rate=16000)
-		ret_frames = []
-		for f in frames:
-			if f.samples == 160:
-				return frames
-		for f in frames:
-			b1 = self.remind_byts + frame2bytes(f)
-			while len(b1) >= 320:
-				b = b1[:320]
-				b1 = b1[320:]
-				ret_frames.append(bytes2frame(b))
-			self.remind_byts = b1
-
-				
 	async def recv(self):
 		frame = await self.track.recv()
 		self.sample_rate = frame.sample_rate
 		duration = (frame.samples * 1000) / frame.sample_rate
 		# print(f'{self.__class__.__name__}.recv(): {duration=}, {frame.samples=}, {frame.sample_rate=}')
 		try:
-			frames = self.to16000_160_frames(frame)
+			frames = o16000_160_frames(frame)
 			for frame in frames:
 				await self.vad.vad_check(frame)
 		except Exception as e: