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OverrideCategoryEnableBluetoothInput : inconsistent behavior
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OverrideCategoryEnableBluetoothInput : inconsistent behavior


  • Subject: OverrideCategoryEnableBluetoothInput : inconsistent behavior
  • From: Zachary Kulis <email@hidden>
  • Date: Wed, 30 Mar 2011 09:48:34 -0400

Hi all,

I'm noticing some strange behavior with the
OverrideCategoryEnableBluetoothInput  override for the PlayAndRecord
audio session category. It seems that if I connect a (mono) Bluetooth
headset and then connect a pair of headphones or an FM transmitter to
the dock port, the Bluetooth input override setting has not effect - the
previous audio route is still used. However, if the BT headset is
connected *after* connecting a pair of headphones or a lineout
accessory, the BT headset is used as the audio route. Furthermore, I can
toggle whether the Bluetooth audio route is used by alternately
setting/disabling the override. In the first case, toggling does not work.

I was wondering if anyone has observed this behavior, and whether this
might be the intended behavior on iOS devices. I know that the last
connected device is the preferred device when choosing an audio route,
but the documentation leads me to conclude that one should always be
able to select a Bluetooth headset as the audio route.

Thanks,
Zach
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