title: iOS playing audio to multiple bluetooth devices concurrently
body: <p>I've got some <a href="http://www.amazon.co.uk/Bluetooth-Portable-Mini-Rechargeable-Speaker/dp/B00CD3IDFG/ref=pd_sim_ce_6" rel="noreferrer">bluetooth speakers (similar)</a> and would really like to be able to play to more than one of them concurrently however I can't find a way to do it.</p>
  
  <p>I can deploy my own applications so it doesn't necessarily have to be accomplished through public APIs, but does the iPhone hardware support it?</p>