diff --git a/channel/wechat/wechaty_channel.py b/channel/wechat/wechaty_channel.py
index 2b2c044..82c4f01 100644
--- a/channel/wechat/wechaty_channel.py
+++ b/channel/wechat/wechaty_channel.py
@@ -72,7 +72,7 @@ class WechatyChannel(ChatChannel):
             voiceLength = None
             file_path = reply.content
             sil_file = os.path.splitext(file_path)[0] + '.sil'
-            voiceLength = any_to_sil(file_path, sil_file)
+            voiceLength = int(any_to_sil(file_path, sil_file))
             # 发送语音
             t = int(time.time())
             msg = FileBox.from_file(sil_file, name=str(t) + '.sil')
diff --git a/voice/audio_convert.py b/voice/audio_convert.py
index b6f9d5a..5528099 100644
--- a/voice/audio_convert.py
+++ b/voice/audio_convert.py
@@ -15,7 +15,7 @@ def find_closest_sil_supports(sample_rate):
     for rate in sil_supports:
         diff = abs(rate - sample_rate)
         if diff < mindiff:
-            closest = sample_rate
+            closest = rate
             mindiff = diff
     return closest
 
@@ -68,8 +68,9 @@ def pcm_to_sil(pcm_path, silk_path):
     """
     audio = AudioSegment.from_wav(pcm_path)
     wav_data = audio.raw_data
+    rate = find_closest_sil_supports(audio.frame_rate)
     silk_data = pysilk.encode(
-        wav_data, data_rate=audio.frame_rate, sample_rate=find_closest_sil_supports(audio.frame_rate))
+        wav_data, data_rate=rate, sample_rate=rate)
     with open(silk_path, "wb") as f:
         f.write(silk_data)
     return audio.duration_seconds * 1000
@@ -82,7 +83,8 @@ def mp3_to_sil(mp3_path, silk_path):
     """
     audio = AudioSegment.from_mp3(mp3_path)
     wav_data = audio.raw_data
-    silk_data = pysilk.encode(wav_data, data_rate=audio.frame_rate, sample_rate=find_closest_sil_supports(audio.frame_rate))
+    rate = find_closest_sil_supports(audio.frame_rate)
+    silk_data = pysilk.encode(wav_data, data_rate=rate, sample_rate=rate)
     # Save the silk file
     with open(silk_path, "wb") as f:
         f.write(silk_data)