diff --git a/app.py b/app.py
index 33172b9..03e91d1 100644
--- a/app.py
+++ b/app.py
@@ -15,6 +15,7 @@ import multiprocessing
 
 from aiohttp import web
 import aiohttp
+import aiohttp_cors
 from aiortc import RTCPeerConnection, RTCSessionDescription
 from webrtc import HumanPlayer
 
@@ -106,9 +107,9 @@ def gpt_sovits(text, character, language, server_url, emotion) -> Iterator[bytes
     if res.status_code != 200:
         print("Error:", res.text)
         return
-
+        
     first = True
-    for chunk in res.iter_content(chunk_size=1280): #32K*20ms*2
+    for chunk in res.iter_content(chunk_size=32000): # 1280 32K*20ms*2
         if first:
             end = time.perf_counter()
             print(f"gpt_sovits Time to first chunk: {end-start}s")
@@ -512,6 +513,18 @@ if __name__ == '__main__':
     appasync.router.add_post("/human", human)
     appasync.router.add_static('/',path='web')
 
+    # Configure default CORS settings.
+    cors = aiohttp_cors.setup(appasync, defaults={
+            "*": aiohttp_cors.ResourceOptions(
+                allow_credentials=True,
+                expose_headers="*",
+                allow_headers="*",
+            )
+        })
+    # Configure CORS on all routes.
+    for route in list(appasync.router.routes()):
+        cors.add(route)
+
     def run_server(runner):
         loop = asyncio.new_event_loop()
         asyncio.set_event_loop(loop)
diff --git a/nerfreal.py b/nerfreal.py
index 074219d..9c3e271 100644
--- a/nerfreal.py
+++ b/nerfreal.py
@@ -162,6 +162,8 @@ class NeRFReal:
                     new_frame = AudioFrame(format='s16', layout='mono', samples=frame.shape[0])
                     new_frame.planes[0].update(frame.tobytes())
                     new_frame.sample_rate=16000
+                    # if audio_track._queue.qsize()>10:
+                    #     time.sleep(0.1)
                     asyncio.run_coroutine_threadsafe(audio_track._queue.put(new_frame), loop)  
             #t = time.time()
             if self.opt.customvideo and audiotype!=0:
@@ -215,9 +217,7 @@ class NeRFReal:
     def render(self,quit_event,loop=None,audio_track=None,video_track=None):
         #if self.opt.asr:
         #     self.asr.warm_up()
-        count=0
-        totaltime=0
-
+        
         if self.opt.transport=='rtmp':
             from rtmp_streaming import StreamerConfig, Streamer
             fps=25
@@ -242,6 +242,10 @@ class NeRFReal:
             self.streamer.init(sc)
             #self.streamer.enable_av_debug_log()
 
+        count=0
+        totaltime=0
+        _starttime=time.perf_counter()
+        _totalframe=0
         while not quit_event.is_set(): #todo
             # update texture every frame
             # audio stream thread...
@@ -253,11 +257,12 @@ class NeRFReal:
             self.test_step(loop,audio_track,video_track)
             totaltime += (time.perf_counter() - t)
             count += 1
+            _totalframe += 1
             if count==100:
                 print(f"------actual avg infer fps:{count/totaltime:.4f}")
                 count=0
                 totaltime=0
-            delay = 0.04 - (time.perf_counter() - t) #40ms
+            delay = _starttime+_totalframe*0.04-time.perf_counter() #40ms
             if delay > 0:
                 time.sleep(delay)
             
\ No newline at end of file
diff --git a/requirements.txt b/requirements.txt
index 3fd1921..c3a3f0a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -32,3 +32,4 @@ flask
 flask_sockets
 opencv-python-headless
 aiortc
+aiohttp_cors
diff --git a/webrtc.py b/webrtc.py
index 4cca086..9fc94d1 100644
--- a/webrtc.py
+++ b/webrtc.py
@@ -7,7 +7,9 @@ import time
 from typing import Tuple, Dict, Optional, Set, Union
 from av.frame import Frame
 from av.packet import Packet
+from av import AudioFrame
 import fractions
+import numpy as np
 
 AUDIO_PTIME = 0.020  # 20ms audio packetization
 VIDEO_CLOCK_RATE = 90000
@@ -52,9 +54,9 @@ class PlayerStreamTrack(MediaStreamTrack):
             if hasattr(self, "_timestamp"):
                 # self._timestamp = (time.time()-self._start) * VIDEO_CLOCK_RATE
                 self._timestamp += int(VIDEO_PTIME * VIDEO_CLOCK_RATE)
-                # wait = self._start + (self._timestamp / VIDEO_CLOCK_RATE) - time.time()
-                # if wait>0:
-                #     await asyncio.sleep(wait)
+                wait = self._start + (self._timestamp / VIDEO_CLOCK_RATE) - time.time()
+                if wait>0:
+                    await asyncio.sleep(wait)
             else:
                 self._start = time.time()
                 self._timestamp = 0
@@ -63,9 +65,9 @@ class PlayerStreamTrack(MediaStreamTrack):
             if hasattr(self, "_timestamp"):
                 # self._timestamp = (time.time()-self._start) * SAMPLE_RATE
                 self._timestamp += int(AUDIO_PTIME * SAMPLE_RATE)
-                # wait = self._start + (self._timestamp / SAMPLE_RATE) - time.time()
-                # if wait>0:
-                #     await asyncio.sleep(wait)
+                wait = self._start + (self._timestamp / SAMPLE_RATE) - time.time()
+                if wait>0:
+                    await asyncio.sleep(wait)
             else:
                 self._start = time.time()
                 self._timestamp = 0
@@ -74,6 +76,22 @@ class PlayerStreamTrack(MediaStreamTrack):
     async def recv(self) -> Union[Frame, Packet]:
         # frame = self.frames[self.counter % 30]            
         self._player._start(self)
+        # if self.kind == 'video':
+        #     frame = await self._queue.get()
+        # else: #audio
+        #     if hasattr(self, "_timestamp"):
+        #         wait = self._start + self._timestamp / SAMPLE_RATE + AUDIO_PTIME - time.time()
+        #         if wait>0:
+        #             await asyncio.sleep(wait)
+        #         if self._queue.qsize()<1:
+        #             #frame = AudioFrame(format='s16', layout='mono', samples=320)
+        #             audio = np.zeros((1, 320), dtype=np.int16)
+        #             frame = AudioFrame.from_ndarray(audio, layout='mono', format='s16')
+        #             frame.sample_rate=16000
+        #         else:
+        #             frame = await self._queue.get()
+        #     else:
+        #         frame = await self._queue.get()
         frame = await self._queue.get()
         pts, time_base = await self.next_timestamp()
         frame.pts = pts