Update voice receive example (#843)

* Use BytesIO for sink

* Update voice receive example

Author: plun1331

examples/audio_recording.py

@@ -7,7 +7,8 @@
 
 
 @bot.command()
-async def start(ctx: ApplicationContext, encoding: Option(str, choices=["mp3", "wav", "pcm", "ogg", "mka", "mkv", "mp4", "m4a",])):
+async def start(ctx: ApplicationContext,
+                encoding: Option(str, choices=["mp3", "wav", "pcm", "ogg", "mka", "mkv", "mp4", "m4a", ])):
     """
     Record your voice!
     """
@@ -36,26 +37,28 @@ async def start(ctx: ApplicationContext, encoding: Option(str, choices=["mp3", "
         sink = discord.sinks.MP4Sink()
     elif encoding == "m4a":
         sink = discord.sinks.M4ASink()
+    else:
+        return await ctx.respond("Invalid encoding.")
 
     vc.start_recording(
         sink,
         finished_callback,
         ctx.channel,
     )
-    
+
     await ctx.respond("The recording has started!")
 
 
 async def finished_callback(sink, channel: discord.TextChannel, *args):
-
     recorded_users = [
-        f" <@{user_id}> ({os.path.split(audio.file)[1]}) "
+        f"<@{user_id}>"
         for user_id, audio in sink.audio_data.items()
     ]
     await sink.vc.disconnect()
-    files = sink.get_all_audio()
+    files = [discord.File(audio.file, f"{user_id}.{sink.encoding}") for user_id, audio in sink.audio_data.items()]
     await channel.send(f"Finished! Recorded audio for {', '.join(recorded_users)}.", files=files)
 
+
 @bot.command()
 async def stop(ctx):
     """
@@ -70,4 +73,4 @@ async def stop(ctx):
         await ctx.respond("Not recording in this guild.")
 
 
-bot.run("TOKEN")
+bot.run("TOKEN")