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[Raymond <508522@xxxxxxxxxxxxxxxxxx>]

if a2dp only support playback, pulseaudio fallback to use on board
capture which is steteo ,there will be channel conversion problem when
switch back to HFP mono capture

do HFP playback mono or stereo ?

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https://bugs.launchpad.net/bugs/508522

Title:
  Mic is not available with A2DP Bluetooth profile

Status in “pulseaudio” package in Ubuntu:
  Confirmed

Bug description:
  Binary package hint: pulseaudio

  I'm testing a Nokia BH-905i headset (see http://www.wissel.net/blog/d6plinks/SHWL-8AZGGF ) on Ubuntu 10.10. The Bluetooth module correctly identifies the headset and the both audio profiles "HSP/ HFP Telephony duplex" and "A2DP High Fidelity Playback". For music playback only A2DP is suitable (HSP/HFP sounds like listening to music played through an old telephone). A2DP does not have an INPUT mode, so use of the headset for VoiP isn't possible.
  What would be needed is a separate selection to allow to select A2DP for output and HSP/HFP for input. Smartphones (a lot of them *nix based) phones do that (or they switch on the fly?).

  Formal structure:
  1) Ubuntu 10.10
  2) Pulse-Audio 1:0.9.22~0.9.21+stable-queue-32-g8478-0ubuntu21.1
  consisting og pluseaudio, pulseaudio-esound-compat, pulseaudio-module-bluetooth, pulseaudio-module-gconf, pulseaudio-module-x11, pulseaudio-utils
  3) Select high quality audio output and still use the Bluetooth microphone
  4) Had to choose: either high quality audio or "telephone quality" with microphone

  I can change the profile without the Bluetooth connection dropping,
  but that's ridiculous. E.g. listening to music, a call comes in. Then
  I would need to switch the profile before answering. Please note that
  in Windows, Mac OS, iOS, Android, and Windows Mobile it's done
  automatically.

  Check out attached screencast.

  ProblemType: Bug
  AplayDevices:
   **** List of PLAYBACK Hardware Devices ****
   card 0: Intel [HDA Intel], device 0: AD198x Analog [AD198x Analog]
     Subdevices: 1/1
     Subdevice #0: subdevice #0
  Architecture: i386
  ArecordDevices:
   **** List of CAPTURE Hardware Devices ****
   card 0: Intel [HDA Intel], device 0: AD198x Analog [AD198x Analog]
     Subdevices: 2/2
     Subdevice #0: subdevice #0
     Subdevice #1: subdevice #1
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  oivasyuv   2309 F.... pulseaudio
  Card0.Amixer.info:
   Card hw:0 'Intel'/'HDA Intel at 0xd8500000 irq 17'
     Mixer name	: 'Analog Devices AD1984A'
     Components	: 'HDA:11d4194a,103c30e8,00100400'
     Controls      : 22
     Simple ctrls  : 14
  Date: Sat Jan 16 22:31:41 2010
  DistroRelease: Ubuntu 9.10
  InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release i386 (20091028.5)
  Package: pulseaudio 1:0.9.19-0ubuntu4
  ProcEnviron:
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcVersionSignature: Ubuntu 2.6.31-17.54-generic-pae
  SourcePackage: pulseaudio
  Uname: Linux 2.6.31-17-generic-pae i686

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