iOS Swift播放多个蓝牙音箱的音频。

I am working on a simple program to allow users to send system audio to multiple bluetooth speakers very easily. I really want to know if it is possible, given the current and upcoming APIs, to do this. I want to be able to make the app connect to at least two or three different bluetooth speakers, and make the system send all audio to the speakers somehow. This may be through the app, or the app could make the two speakers mirror each other as one. I guess I would like to know if any approach to getting this functionality is possible. Just to clarify, I am not quite looking to select audio and play it, but have any and all audio from the system be routed to the speakers.I am working on a simple program to allow users