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krunal09 / csipsimple

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No outbound Bluetooth audio from Motorola Defy #1008

Closed GoogleCodeExporter closed 9 years ago

GoogleCodeExporter commented 9 years ago 
What steps will reproduce the problem?
1. Establish a call.
2. Ensure that you are using bluetooth audio device.
3. Listen to the receiver of the phone that has been called (ie standard 
landline telephone)

What is the expected output? What do you see instead?

Expected output would be to hear a 'two way' conversation.
There is good audio heard on the inbound speech over bluetooth to the Moto Defy 
running csipsimple but there is no audio outbound.
(actually there is a very faint outbound audio but it is distorted and 
incomplete)

What version of the product are you using? On what operating system?

Stock Froyo 2.2.1 csipsimple 0.02-01 (from market)

Please provide any additional information below.

I am using 8k sampling and I have tried all combinations of microphone input 
and sip settings under the 'expert' settings.
Normal cellular calls work fine over bluetooth and csipsimple works wonderfully 
when not using bluetooth.

Original issue reported on code.google.com by paulblac...@gmail.com on 31 May 2011 at 10:33

GoogleCodeExporter commented 9 years ago 
Defy's BT support is already known as a problematic implementation. 
Please track issue 51 (and add comments if necessary).

The fact that normal cellular calls works is not relevant cause the application 
that retain the BT SCO connection is actually the GSM app. So that's normal 
that it works with this one ;).

Usually when we get this kind of problem it's cause the manufacturer did crappy 
things on the ROM. For example directly plug routing at very low level between 
the GSM chipset and the BT micro input, without giving ways to apps to get the 
audio packets.
What would be much more interesting would be another app (third party) that 
have bluetooth working on your phone. It could give some clues about the 
workaround we should apply to get it working. Most of the times workarounds are 
either the micro source or the mode for sip calls -with use mode api disabled-, 
but it could also be something about the order of activation of mode, BT and so 
on .

Original comment by r3gis...@gmail.com on 31 May 2011 at 10:58