how to route iPhone audio to the bluetooth headset

Question

I\'m attempting to output audio to the bluetooth headset (not A2DP) using AVAudioPlayer, AVAudioSession and AudioSessionSetProperty.

There seems to be functions to s

Answer 1

I was able to get this working, but it took some doing. I've pieced together the pertinent piece of code here:

[audioSession setCategory:AVAudioSessionCategoryPlayAndRecord error:&err];

UInt32 allowBluetoothInput = 1;
AudioSessionSetProperty(
    kAudioSessionProperty_OverrideCategoryEnableBluetoothInput,
    sizeof (allowBluetoothInput),
    &allowBluetoothInput);

It is also possible to which sources are available and switch between bluetooth, a headset, handset or the speakerphone but things become very involved at that point. The audio source manager I ultimately wrote was over 700 lines.