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不死怨灵讨论 | 贡献2010年4月17日 (六) 16:41的版本 蓝牙音频概况

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蓝牙音频概况

使用蓝牙时有两种不同的音频配置方案,使用哪一个取决于你将如何使用你的耳机以及你如何计划使用它。 "sco" 音频配置是一个低品质、低延时的连接方案。音质近似于无线电话。糟糕的音质在听音乐的时候显得尤为明显。"a2d" 音频配置是一个高品质的压缩连接,并且提供出色的音频品质。截止到2007年7月13日a2d音频驱动无法通过apt获取,而是需要手动编译安装。这是首选的蓝牙音频配置方案。

安装低品质"sco" 音频驱动程序

注意:原作者已经停止维护此软件

载入前提:
sudo apt-get install bluez-btsco
sudo modprobe snd-bt-sco

注意:如果你喜欢让这个模块在启动时被自动加载,运行'gksu gedit /etc/modules' 并加入一行:'snd-bt-sco'。

Determine the BT Address of the headset

  1. Put the device into "Pairing" mode. This procedure varies by headset, but usually involves holding down the power button for 10-15 seconds.
  2. Open a terminal and run 'hcitool scan'

""Note: I am using my address '00:07:a4:b8:f9:77' for this example."" ""Please substitute your address from the hcitool scan output for the remaining steps.""

  1. Look for output like this.
 ellie@ellie-laptop:~$ hcitool scan
 Scanning ...
         00:07:A4:B8:F0:77       Motorola HT820
 ellie@ellie-laptop:~$
  1. Edit /etc/bluetooth/hcid.conf (gksu gedit /etc/bluetooth/hcid.conf ) and add a section like this
 device 00:07:A4:B8:F9:77 {
         name "Motorola HT820"
         auth enable;
         encrypt enable;
 }
  1. Restart Bluetooth services
sudo /etc/init.d/bluetooth restart

Starting the "sco" driver for the first time

  1. Place the Headset into "pairing" mode as above.
  2. Open a terminal and run 'btsco -v 00:07:a4:b8:f9:77'
  3. This should cause the gnome bluetooth manager to ask you for a pin number to pair. This is usually 0000 or 1234

Testing the "sco" driver

aplay -B 1000000 -D plughw:Headset /usr/share/sounds/login.wav

You should hear the Ubuntu Login sound.

Configuring btsco to run automatically at each boot

  1. Open System -> Preferences -> Sessions and select "startup Programs"
  2. Click New.
  3. Enter "BT Sco Headset audio" for the Name.
  4. Enter '/usr/bin/btsco -r -f 00:07:a4:b8:f9:77'
  5. Click Ok and Apply

Setting the headset as your default alsa audio device

asoundconf set-default-card Headset

This will create the appropriate entries in your .asoundrc file. This setting is per-user.

GUI tool for BT Sco config

An alternative way of configure your BT Headset it's using Gbtsco, a simple GUI for all the previously described hard work. http://www.stgraber.org/2007/05/20/gbtsco-already-release-02/ Please take into account that at this time btsco and snd-bt-sco are deprecated in favour of the new bluez development, but btsco still works until is definitely replaced by the new solution. More info at http://www.bluez.org/

Setting the headset as your default alsa audio device

asoundconf set-default-card Headset

This will create the appropriate entries in your .asoundrc file. This setting is per-user.

GUI tool for BT Sco config

An alternative way of configure your BT Headset it's using Gbtsco, a simple GUI for all the previously described hard work. http://www.stgraber.org/2007/05/20/gbtsco-already-release-02/ Please take into account that at this time btsco and snd-bt-sco are deprecated in favour of the new bluez development, but btsco still works until is definitely replaced by the new solution. More info at http://www.bluez.org/

Installing High quality "a2d" audio drivers

The bluetooth-alsa package is available since Ubuntu 7.10 (Gutsy).

Using "a2d" audio drivers

Pairing a headset using the Bluetooth Manger works as designed through the GUI, however routing sound to the newly paired headset is not possible using Sound Preferences (found at System > Preferences > Sound Preferences). In the Sound Preferences dialog under Devices > Music and Movies > Sound Playback you should be able to pick the paired bluetooth headset. However, the headset does not appear in the list of options. To direct sound output to the headset open a terminal window and enter the following:

gconftool -t string -s /system/gstreamer/0.10/default/musicaudiosink "sbcenc ! a2dpsink device=XX:XX:XX:XX:XX:XX"

Where XX:XX:XX:XX:XX:XX is the MAC address of the headset. After executing this command you can reopen the Sound Preferences window and see under Devices > Music and Movies > Sound Playback that the field is now blank (your device can not be represented because the headset isn't a available option in the drop down list). To redirect the sound back to the computer's speakers select Autodetect for Devices > Music and Movies > Sound Playback. You will have to restart Rhythmbox each time you make a change. This information was taken from http://wiki.bluez.org/wiki/HOWTO/AudioDevices.

Troubleshooting

The BluetoothSkype; page has additional information for configuring the new driver. See Contact/troubleshooting for troubleshooting information. There is additional information for audio troubleshooting at BluetoothPulseaudioTroubleshooting If you experience drop in audio while you use your bluetooth mouse, change this options in /etc/bluetooth/hcid.conf, device section: Change “lm accept;” to “lm master;” and change “lp rswitch,hold,sniff,park;” to “lp hold,sniff,park;”. Then restart bluetooth (/etc/init.d/bluetooth force-reload).