@bot.command(name=left')
async def bark(ctx):
    user = ctx.message.author
    if user.voice != None:
        try:
            vc = await user.voice.channel.connect()
        except:
            vc = ctx.voice_client
        if vc.is_playing():
            vc.stop()
        source = await nextcord.FFmpegOpusAudio.from_probe(source="music/bot_left_channel.mp3", method='fallback')
        vc.play(source)
    else:
        ctx.voice_client.disconnect()