Sunday, November 25, 2012

Audio Adventures in Bluetooth


Bluetooth is crazy making.  But in this case it's just a red herringIf you are experiencing audio issues with bluetooth, you might want to read on I uncovered a logic that's probably bugged a lot of folks

If your computer has multiple audio in and out plugs, this may be the source of audio issues.  The fix is simple.  Here's my write up.

Background For My Fellow Geeks -> First Clue: ATAPI 

Realtek Digital showed I had an "ATAPI Internal Jack.  As you already know, TAPI (Telephony Application Programming Interface) started out in the dinosaur age as modem in part to handle audio transmission.  So I searched for "ATAPI" and found this thread.  It pointed to a video.   It's amusing to watch -- rather like a silent movie when your audio is out....  ;->


Audio In and Out Multiple Jacks


To cut to the chase, my Dell workstation has both front and back audio plug-ins.  That's right, two microphone inputs and two speaker plugs.  Obviously this makes it easy for you to plug in your headset from the front.  But it can make it tricky for the 'puter to handle multiple audio channels.


Audio Gets Lost

Intuitively I gather the routing of the audio gets lost.  So the drivers aren't designed to easily thread multiple inputs/outputs.  In addition, defaults are set to give every device exclusive control which just exacerbates the situation.


Fix Part 1 -- Trick Basic Audio Settings

The trick is to go to the Sounds in the Control Panel.  Go to each device listed - both the playback and recording.  Check to see if the settings has been check marked to give exclusive control and uncheck this on each device.  In addition, disable each device.  Next go back to each device and the enable each and every one.  No reboot required.



Part 2 -- Automatic Bluetooth Audio

It gets easier, way easier.  I thought I was still a few steps from my goal to enable audio on my Bluetooth headset.  But after I went through Part 1, it was all downhill.  As the headset was already paired, all I had to do was watch as the computer automatically updated with a couple of drivers.  One was IVT Virtual, which now shows under BROADCOM Bluetooth Device as version 6.2.49.124.  The other is Bluetooth SCO Audio version 6.1.34.104 from IVT Corporation.


Testing

Skype is very handy to confirm both the microphone and speaker side works with my Motorola H690 bluetooth headsetJust run the Skype test call.


Confirm New Settings

FWEIW: Device Manager confirms the following sound, video and game controllers are working:

    Bluetooth SCO Audio
    Intel(R) High Definition Audio HDMI
    Plantronics Calisto Pro Series
    Realtek High Definition Audio
    Unimodem Half-Duplex Audio Device
    USB Audio DAC
 

Perhaps Realtek Digital Output is totally in control since it is set as default.  Realtek Digital Output shows driver v6.0.1.5678.

Wish me luck, I'm going to log out and reboot.....