Use Audio Unit I/O to create audio on the fly?

问题

I am doing a POC in which I need to create an app which fetches Input from iPhone mic and outs the output to the Bluetooth headset/speakers.

I referred the following code

http://www.stefanpopp.de/2011/capture-iphone-microphone/

The code works flawlessly but it produces the output via In-Call Speakers.

Can anyone suggest where I should edit the code to re-route the output to Bluetooth Speakers?

来源：https://stackoverflow.com/questions/20393249/use-audio-unit-i-o-to-create-audio-on-the-fly