diff --git a/pyrogram/methods/messages/send_audio.py b/pyrogram/methods/messages/send_audio.py
index 0267d56aa..d4a3001b0 100644
--- a/pyrogram/methods/messages/send_audio.py
+++ b/pyrogram/methods/messages/send_audio.py
@@ -197,7 +197,9 @@ async def progress(current, total):
         try:
             if isinstance(audio, str):
                 if os.path.isfile(audio):
-                    mime_type = utils.voiceAudioUrlFuxUps(self, audio, 1)
+                    mime_type = self.guess_mime_type(audio) or "audio/mpeg"
+                    if mime_type == "audio/ogg":
+                        mime_type = "audio/opus"
                     thumb = await self.save_file(thumb)
                     file = await self.save_file(audio, progress=progress, progress_args=progress_args)
                     media = raw.types.InputMediaUploadedDocument(
@@ -220,7 +222,9 @@ async def progress(current, total):
                 else:
                     media = utils.get_input_media_from_file_id(audio, FileType.AUDIO)
             else:
-                mime_type = utils.voiceAudioUrlFuxUps(self, file_name or audio.name, 1)
+                mime_type = self.guess_mime_type(audio.name) or "audio/mpeg"
+                if mime_type == "audio/ogg":
+                    mime_type = "audio/opus"
                 thumb = await self.save_file(thumb)
                 file = await self.save_file(audio, progress=progress, progress_args=progress_args)
                 media = raw.types.InputMediaUploadedDocument(
diff --git a/pyrogram/methods/messages/send_voice.py b/pyrogram/methods/messages/send_voice.py
index 6e090b523..ee8c4f454 100644
--- a/pyrogram/methods/messages/send_voice.py
+++ b/pyrogram/methods/messages/send_voice.py
@@ -176,7 +176,9 @@ async def send_voice(
         try:
             if isinstance(voice, str):
                 if os.path.isfile(voice):
-                    mime_type = utils.voiceAudioUrlFuxUps(self, voice, 2)
+                    mime_type = self.guess_mime_type(voice) or "audio/ogg"
+                    if mime_type == "audio/mpeg":
+                        mime_type = "audio/ogg"
                     file = await self.save_file(voice, progress=progress, progress_args=progress_args)
                     media = raw.types.InputMediaUploadedDocument(
                         mime_type=mime_type,
@@ -196,7 +198,9 @@ async def send_voice(
                 else:
                     media = utils.get_input_media_from_file_id(voice, FileType.VOICE)
             else:
-                mime_type = utils.voiceAudioUrlFuxUps(self, voice.name, 2)
+                mime_type = self.guess_mime_type(voice.name) or "audio/ogg"
+                if mime_type == "audio/mpeg":
+                    mime_type = "audio/ogg"
                 file = await self.save_file(voice, progress=progress, progress_args=progress_args)
                 media = raw.types.InputMediaUploadedDocument(
                     mime_type=mime_type,
diff --git a/pyrogram/utils.py b/pyrogram/utils.py
index 7d65ff7f5..acfc4dbcf 100644
--- a/pyrogram/utils.py
+++ b/pyrogram/utils.py
@@ -472,24 +472,3 @@ def get_first_url(text):
     matches = re.findall(r"(https?):\/\/([\w_-]+(?:(?:\.[\w_-]+)+))([\w.,@?^=%&:\/~+#-]*[\w@?^=%&\/~+#-])", text)
 
     return f"{matches[0][0]}://{matches[0][1]}{matches[0][2]}" if matches else None
-
-
-def voiceAudioUrlFuxUps(
-    client: "pyroram.Client",
-    file_name: str,
-    dinxe: int
-) -> str:
-    un_posi_mt = [
-        "application/zip",  # 0
-        # https://t.me/c/1220993104/1360174
-        "audio/mpeg",  # 1
-        "audio/ogg",  # 2
-    ]
-    mime_type = client.guess_mime_type(file_name) or un_posi_mt[dinxe]
-    # BEWARE: https://t.me/c/1279877202/31475
-    if dinxe == 1 and mime_type == "audio/ogg":
-        mime_type = "audio/opus"
-    elif dinxe == 2 and mime_type == "audio/mpeg":
-        mime_type = "audio/ogg"
-    # BEWARE: https://t.me/c/1279877202/74
-    return mime_type