Tim-developer

from aiogram.types import FSInputFile


@dp.message(Command('song'))
async def send_songs(message):
    await message.answer("Hello!")
    await message.answer("World!")
    audio = FSInputFile('audio.mp3') # используй FSInputFile вместо open
    await bot.send_audio(message.chat.id, audio)

await message.restrict_chat_member(ChatPermissions(can_send_messages=False))