Python Discord.py：播放音频到语音频道的速度加快

我使用Discord.py制作了一个简单的Discord机器人，它可以播放本地文件中的短音频片段，并在播放结束后离开。机器人工作得很好，但现在所有的音频都在加速。我没有更改代码中的任何内容。有一些音频剪辑可以选择，有些明显加快了速度，而有些甚至有时不播放。提速也不一致

主代码

@bot.event
async def on_ready():
    print('Logged in as {0.user}'.format(bot))

@bot.command()
async def meme(ctx, message):
    server = ctx.message.guild.name
    #check if user is in voice channel or if command is valid
    if not ctx.author.voice:
        return await ctx.send("Join a voice channel!") 
    else:
        if message in audioPathsDict:
            audioPath = audioPathsDict[message]
        else:
            return await ctx.send("Not a valid command!")
    #voice_channel is channel of command author
    voice_channel = ctx.message.author.voice.channel
    try:
        vc = await voice_channel.connect()
        print(f"Played {audioPath} in Voice Channel: {voice_channel}, Server: {server}\n")
    except:
        print("Already Connected to a voice channel")
    voice = discord.utils.get(bot.voice_clients,guild = ctx.guild)
    vc.play(FFmpegPCMAudio(audioPath))
    vc.source = discord.PCMVolumeTransformer(vc.source)
    vc.source.volume = 0.1
    while vc.is_playing():
        await sleep(2)#while audio is playing wait 0.5 then disconnect
    await vc.disconnect()