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From: Chester on 4 Nov 2007 20:14
Something must be wrong with your device, 'usejointstereo' being set to '0'
turns it off, which provides true stereo. If that's not what's happening
with your setup, something's wrong with either your headset or device.

"Code Developer" <codedeveloper2007(a)removeme.hotmail.co.uk> wrote in message
news:E2rSi.18656$eu2.14643(a)newsfe4-gui.ntli.net...
> I have an Eten M700 with Windows Mobile 6 and have just bought a pair of
> bluetooth stereo headphones (Plantronics Pulsar 260).
>
> After noticing that the sound quality is pretty poor over bluetooth
> compared to wired headphones, can anyone elaborate on the following
> points? ...
>
> 1) I've tried the most suggested registry improvements of setting BitPool,
> MaxSupportedBitPool and SampleRate to higher values. While these make a
> slight difference, there is still noticeable high-frequency distortion.
>
> 2) I've tried setting the 'UseJointStereo' key to both '1' and '0'. When
> set to '0', I get stereo sound with distortion. When set to '1' I get only
> mono sound but better quality.
>
> After some google searches I have read that setting the key to '1' should
> still result in stereo sound if the latest WM6 A2DP bluetooth drivers are
> being used; if the sound is mono then the older A2DP (poor-quality)
> drivers are being used. Can anyone confirm this?
>
> 3) If my WM6 device is still using older A2DP drivers, is there a way to
> upgrade to the latest?
>
> Note, I have also tried Motorola HT820 bluetooth headphones in the past
> and got exactly the same results, quality-wise. Lots of high-frequency
> distortion no matter what registry settings I use.
>
> Regards,
> Shaun.
>
>
>
From: "Werner "Menneisyys" Ruotsalainen [MVP - Windows - Mobile Devices]" on 5 Nov 2007 03:23
> After some google searches I have read that setting the key to '1' should
> still result in stereo sound if the latest WM6 A2DP bluetooth drivers are
> being used; if the sound is mono then the older A2DP (poor-quality)
> drivers are being used. Can anyone confirm this?

Yup, this is the case. Tell the Eten folks to release a pathc.
Alternatively, you can look around at XDA-Dev - hopefully a generic patch
will increase the sound quality.

--


--
Werner "Menneisyys" Ruotsalainen - Microsoft MVP - Windows - Mobile Devices
Please see the Pocket PC Mag Expert Blog (including mine) at
http://www.pocketpcmag.com/blogs/ - you will definitely like it.


"Chester" <no_spam(a)junkmail.com> wrote in message
news:boCdnUiAppTNkIbanZ2dnUVZ_h6vnZ2d(a)giganews.com...
> My Motorola S9's sound GREAT with my T-Mobile WM6 Dash (Bluetooth 2.0).
> Both the headsets and the Dash have Bluetooth 2.0.
>
> "Code Developer" <codedeveloper2007(a)removeme.hotmail.co.uk> wrote in
> message news:E2rSi.18656$eu2.14643(a)newsfe4-gui.ntli.net...
>> I have an Eten M700 with Windows Mobile 6 and have just bought a pair of
>> bluetooth stereo headphones (Plantronics Pulsar 260).
>>
>> After noticing that the sound quality is pretty poor over bluetooth
>> compared to wired headphones, can anyone elaborate on the following
>> points? ...
>>
>> 1) I've tried the most suggested registry improvements of setting
>> BitPool, MaxSupportedBitPool and SampleRate to higher values. While these
>> make a slight difference, there is still noticeable high-frequency
>> distortion.
>>
>> 2) I've tried setting the 'UseJointStereo' key to both '1' and '0'. When
>> set to '0', I get stereo sound with distortion. When set to '1' I get
>> only mono sound but better quality.
>>
>> After some google searches I have read that setting the key to '1' should
>> still result in stereo sound if the latest WM6 A2DP bluetooth drivers are
>> being used; if the sound is mono then the older A2DP (poor-quality)
>> drivers are being used. Can anyone confirm this?
>>
>> 3) If my WM6 device is still using older A2DP drivers, is there a way to
>> upgrade to the latest?
>>
>> Note, I have also tried Motorola HT820 bluetooth headphones in the past
>> and got exactly the same results, quality-wise. Lots of high-frequency
>> distortion no matter what registry settings I use.
>>
>> Regards,
>> Shaun.
>>
>>
>>


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