[Bluez-users] Poor audio quality Headset using snd-bt-sco

[Bluez-users] Poor audio quality Headset using snd-bt-sco

[Stefan Gold]

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Hi,

I've noticed that the audio quality of my headset using snd-bt-sco is very 
bad. I know that the headset-profile is not intended to reach HIFI sound 
quality, but in this case the quality is that worse, that I can't use it for 
telephony.

I'm using a Logitech Bluetooth Desktop with the corresponding USB BT-Dongle. 
My kernel is the latest 2.6.11.6, which also has been patched with 
patch-2.6.11-mh2.

To use the BT-keyboard and the MX900 mouse the hidd server is running. I've 
added the hidd option "--encrypt", so my keyboard is paired.

If I'm not using the HID-devices (KB & mouse) and do a 'hidd --killall', then 
the sound quality is like expected from a BT-headset. But that workaround is 
unfortunately not acceptable. ;-)

Can anybody tell, what the reason for this problem is and how to solve it?

Regards,
  Stefan

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Re: [Bluez-users] Poor audio quality Headset using snd-bt-sco

[Stefan Gold]

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Hi,

some remarks to my problem: If I start hidd with "--master", then my 
BT-Headset seems to work fine, but my mouse is fidgety and jumps while 
moving.

Another strange thing is, that the connection to the headset is registered as 
ACL, not as SCO like it should be:

positron:/# hcitool con
Connections:
        < ACL 00:06:C5:00:43:02 handle 47 state 1 lm MASTER
        > ACL 00:07:61:0D:08:E3 handle 44 state 1 lm MASTER AUTH ENCRYPT
        > ACL 00:07:61:17:19:F6 handle 41 state 1 lm MASTER

The first line is the headset.

Any ideas?

Stefan
-- 
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                                                               Tyler Durden

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