11-07-2006, 03:00 PM
|
|
Executive Editor, Android Thoughts
Join Date: Aug 2006
Posts: 3,233
|
|
Menneisyys On A2DP: Widcomm and Microsoft BT Throwdown!
"There is not really competition between the A2DP quality of the two Bluetooth stacks. If you happen to have a WM5-upgraded Dell Axim x50(v) or x51(v), don�t hesitate: install the Widcomm BT stack on it if you want the best available sound quality. You�ll be presented definitely better sound quality, on the expense of slightly (but not much!) decreased battery life. And, of course, you get a lot of additional Widcomm goodies like Bluetooth PAN and the like. Similarly, if you need to choose between, say, a Widcomm BT stack-based device and a MS-based one (and there's no known Widcomm hack for the latter), go for the earlier, if, otherwise, the two devices are the same."
A2DP is a topic near to my heart, as it is something I'm truly happy to have in my devices now (And something I was really annoyed not to have 10 months ago). Strangely, I find that Microsoft's A2DP Profile in AKU 3 devices to be fairly bug free and not as processor intensive as the AKU 2 version that Menneissys has looked at. Any A2DP users out there that want to weigh in - Widcomm or Microsoft BT stack for advanced audio?
__________________
Dr. Jon Westfall, MCSE, MS-MVP
Executive Editor - Android Thoughts
News Editor - Windows Phone Thoughts
|
| |
|
|
|
11-07-2006, 03:35 PM
|
|
Neophyte
Join Date: Oct 2006
Posts: 2
|
|
I've been using my Cingular 3125 with two different models of Logitech headphones (the new FreePulse and the earlier version) and both work perfectly and have excellent sound quality.
|
| |
|
|
|
11-07-2006, 03:46 PM
|
|
5000+ Posts? I Should OWN This Site!
Join Date: Jun 2007
Posts: 5,067
|
|
Re: Menneisyys On A2DP: Widcomm and Microsoft BT Throwdown!
Quote:
|
Originally Posted by Jon Westfall
I find that Microsoft's A2DP Profile in AKU 3 devices to be fairly bug free and not as processor intensive as the AKU 2 version that Menneissys has looked at
|
BTW, what device are you running AKU3 at? I'd really like to know whether the sound quality bug (which can be described as not using a low-pass filter designed to comply with Nyquist�Shannon sampling theorem - it's known for anyone that has ever with digitalizing sound) has been fixed in the A2DP support of AKU3 by Microsoft.
|
| |
|
|
|
11-07-2006, 03:55 PM
|
|
5000+ Posts? I Should OWN This Site!
Join Date: Jun 2007
Posts: 5,067
|
|
(I've just added a new section on the exact, electric engineer-friendly description of the sound problem of the MS BT stack.)
|
| |
|
|
|
11-07-2006, 06:36 PM
|
|
Ponderer
Join Date: May 2006
Posts: 110
|
|
Do not use Widcom for dell Axim x51v - it is unstable.
A2DP over MS BT works well unless you try to play stream from net over WiFi - that is only bug I found so far and it affects not only Dell's but others as I found reading xda-developers forum
|
| |
|
|
|
11-07-2006, 06:46 PM
|
|
Developer & Designer, News Editor Emeritus
Join Date: Aug 2006
Posts: 12,959
|
|
Re: Menneisyys On A2DP: Widcomm and Microsoft BT Throwdown!
Quote:
|
Originally Posted by Menneisyys
BTW, what device are you running AKU3 at? I'd really like to know whether the sound quality bug (which can be described as not using a low-pass filter designed to comply with Nyquist�Shannon sampling theorem - it's known for anyone that has ever with digitalizing sound) has been fixed in the A2DP support of AKU3 by Microsoft. |
I believe Jon's using the T-Mo Dash.
I can also test this out for you when the X500 arrives on my doorstep. That uses AKU3.2.
|
| |
|
|
|
11-07-2006, 08:29 PM
|
|
Thoughts Media Review Team
Join Date: Aug 2006
Posts: 749
|
|
I've read through this article and most of the two threads on Aximsite related to this project.
although I found what I believe to be the appopriate download, hat I guess I missed was exactly how to install the Widcomm stack on an Axim X50V WM5.
The discussion is very technical and not for the casual PPC user.
__________________
/drt
|
| |
|
|
|
11-07-2006, 08:39 PM
|
|
5000+ Posts? I Should OWN This Site!
Join Date: Jun 2007
Posts: 5,067
|
|
Re: Menneisyys On A2DP: Widcomm and Microsoft BT Throwdown!
Quote:
|
Originally Posted by Darius Wey
I can also test this out for you when the X500 arrives on my doorstep. That uses AKU3.2.
|
That'd be very nice. I'll also try to test the A2DP with a strong low-pass pre-filtering (that is, the A2DP coder will only get a sufficiently low-pass-filtered content and, therefore, there can't be aliasing) so that we can find out whether it's indeed aliasing, or something else.
|
| |
|
|
|
11-07-2006, 08:41 PM
|
|
5000+ Posts? I Should OWN This Site!
Join Date: Jun 2007
Posts: 5,067
|
|
Quote:
|
Originally Posted by Don Tolson
although I found what I believe to be the appopriate download, hat I guess I missed was exactly how to install the Widcomm stack on an Axim X50V WM5.
|
Just execute the CAB file in BroadcomBluetoothStackX51V05.zip - it'll automatically install the Widcomm stack on your device without your need to do anything else. After a reboot, you'll already have Widcomm.
|
| |
|
|
|
11-07-2006, 08:45 PM
|
|
5000+ Posts? I Should OWN This Site!
Join Date: Jun 2007
Posts: 5,067
|
|
Quote:
|
Originally Posted by x51vuser
Do not use Widcom for dell Axim x51v - it is unstable.
|
It depends on what you're using it for. I've been using it for more than a month, 6-10 hours a day, to feed music into my Pulsar 590A via A2DP - I haven't ever encountered problems.
Of course, it might have problems with, say, some GPS modules, but, for A2DP (and AVRCP), it's excellent.
Quote:
|
Originally Posted by x51vuser
A2DP over MS BT works well
|
It does work well - it's just that the sound quality is not so good as with the Widcomm BT stack, under exactly the same circumstances, the same hardware, with all sound sources. This, in addition, isn't just a Dell Axim x51v-specific problem - I've enountered exactly the same behaviour and, comparatively, bad (aliased-like) sound quality on my Wizard. On the latter, of course, I couldn't compare it to the Widcomm BT quality as there aren't known Widcomm BT hacks for the Wizard. (Unfortunately...)
|
| |
|
|
|
|
|
Linear Mode
