title: Send Music and Additional Data over Bluetooth Concurrently?
body: <p><strong>The scenario:</strong></p>
  <p>My friends and I are developing a product with a bluetooth reciever that connects to a speaker system.  Currently we can pair with this unit and stream music over a bluetooth connection.  I'd like to develop an app that I can use to control different settings on our unit while the music is streaming.  My application needs to be able to do this no matter which app is streaming the music over bluetooth (native media player, spotify, pandora etc.).  I'm thinking this potentially a permissions issue as opposed to a bandwidth issue...</p>
  <p><strong>I need to know:</strong></p>
  <p>Is it possible to send control data and an audio stream concurrently to the same bluetooth reciever?  If so, could someone please point toward a good strategy that will help me accomplish this (eg what protocol to use for the control data)?  If it is not possible, can someone recommend a better way to control the target device?</p>
  <p>I wasn't able to find what I was looking for in the Android Developer docs.</p>