Former Music.py code

@bot.command()
async def join(ctx):
    channel = ctx.author.voice.channel
    await channel.connect()

@bot.command()
async def leave(ctx):
    channel = ctx.author.voice.channel
    await ctx.voice_client.disconnect()

@bot.command(pass_context=True, aliases=['p', 'pla'])
async def play(ctx, url: str = None):
    if url is None:
        embed = discord.Embed(title = "Please Specify A YouTube URL")
        await ctx.send(embed=embed)
    else:
        channel = ctx.author.voice.channel
        await channel.connect()
        embed=discord.Embed(title = 'Joined Voice Channel', description=f"Name: {channel}")
        await ctx.send(embed=embed)

        song_there = os.path.isfile("song.mp3")
        try:
            if song_there:
                os.remove("song.mp3")
                print("Removed old song file")
        except PermissionError:
            print("Trying to delete song file, but it's being played")
            await ctx.send("ERROR: Music playing")
            return

        embed=discord.Embed(description=f"**Preparing:** I am preparing this audio track now.")
        await ctx.send(embed=embed)

        voice = get(bot.voice_clients, guild=ctx.guild)

        ydl_opts = {
            'format': 'bestaudio/best',
            'postprocessors': [{
                'key': 'FFmpegExtractAudio',
                'preferredcodec': 'mp3',
                'preferredquality': '192',
            }],
        }

        with youtube_dl.YoutubeDL(ydl_opts) as ydl:
            print("Downloading audio now\n")
            ydl.download([url])

        for file in os.listdir("./"):
            if file.endswith(".mp3"):
                name = file
                print(f"Renamed File: {file}\n")
                os.rename(file, "song.mp3")

        voice.play(discord.FFmpegPCMAudio("song.mp3"), after=lambda e: print("Song done!"))
        voice.source = discord.PCMVolumeTransformer(voice.source)
        voice.source.volume = 0.09

        nname = name.rsplit("-", 2)

        embed2=discord.Embed(title=f"Now Playing Song", description = f"Song: **{nname[0]}**")
        await ctx.send(embed=embed2)