diff --git a/src/edgeTTS/__init__.py b/src/edgeTTS/__init__.py
index 6a579cc..5f3e3d1 100755
--- a/src/edgeTTS/__init__.py
+++ b/src/edgeTTS/__init__.py
@@ -113,7 +113,7 @@ class Communicate:
             message+="<voice  name='" + voice + "'>" + "<prosody pitch='" + pitch + "' rate ='" + rate + "' volume='" + volume + "'>" + text + '</prosody></voice></speak>'
         return message
 
-    async def run(self, msg, sentenceBoundary=False, wordBoundary=False, codec="audio-24khz-48kbitrate-mono-mp3", voice="Microsoft Server Speech Text to Speech Voice (en-US, AriaNeural)", pitch="+0Hz", rate="+0%", volume="+0%", customspeak=False):
+    async def run(self, msg, sentenceBoundary=False, wordBoundary=False, codec="webm-24khz-16bit-mono-opus", voice="Microsoft Server Speech Text to Speech Voice (en-US, AriaNeural)", pitch="+0Hz", rate="+0%", volume="+0%", customspeak=False):
         sentenceBoundary = bool_to_lower_str(sentenceBoundary)
         wordBoundary = bool_to_lower_str(wordBoundary)
 
@@ -205,7 +205,7 @@ async def _main():
     )
     parser.add_argument('-z', '--custom-ssml', help='treat text as ssml to send. For more info check https://bit.ly/3fIq13S', action='store_true')
     parser.add_argument('-v', '--voice', help='voice for TTS. Default: Microsoft Server Speech Text to Speech Voice (en-US, AriaNeural)', default='Microsoft Server Speech Text to Speech Voice (en-US, AriaNeural)')
-    parser.add_argument('-c', '--codec', help="codec format. Default: audio-24khz-48kbitrate-mono-mp3. Another choice is webm-24khz-16bit-mono-opus. For more info check https://bit.ly/2T33h6S", default='audio-24khz-48kbitrate-mono-mp3')
+    parser.add_argument('-c', '--codec', help="codec format. Default: webm-24khz-16bit-mono-opus. Another choice is audio-24khz-48kbitrate-mono-mp3. For more info check https://bit.ly/2T33h6S", default='webm-24khz-16bit-mono-opus')
     group.add_argument('-l', '--list-voices', help="lists available voices. Edge's list is incomplete so check https://bit.ly/2SFq1d3", action='store_true')
     parser.add_argument('-p', '--pitch', help="set TTS pitch. Default +0Hz, For more info check https://bit.ly/3eAE5Nx", default="+0Hz")
     parser.add_argument('-r', '--rate', help="set TTS rate. Default +0%%. For more info check https://bit.ly/3eAE5Nx", default="+0%")