WM6 A2DP best settings here

[hardcore]

After discussions with Sleuth255, I've done some further testing on the registry settings and found some optimum settings for A2DP. These are applicable to the newer releases of WM6.

Finding #1:

ADD/CHANGE the following values from the registry at HKLM\Software\Microsoft\Bluetooth\A2DP\Settings :
Name: UseJointStereo
Value (DWORD): 1

What this does is enable Joint-Stereo for the SBC codec, which is important and makes the biggest significant change to improve sound quality. (Note: In earlier versions of WM5 and WM6, Joint-Stereo was broken and resulted in a mono-output. This is not the case anymore with the newer WM6 ROMS.)

Further note: Sleuth255 found that some of his A2DP headsets could not work with JS turned on. In that case, you have to set the value to 0 to disable JS (resulting in poorer quality sound with more "hissing").

Finding #2:

REMOVE the following values from the registry at HKLM\Software\Microsoft\Bluetooth\A2DP\Settings if they are present:
- BitPool
- MaxSupportedBitPool

These values are used to manually set limits for the BT stack for the A2DP SBC codec. Previously, it was thought that these values should be set between 38 to 86. But if the values are removed, I think that the BT stack automatically chooses the best BitPool values for maximum quality. I've tried removing these values and the sound quality either improved or at least stayed the same.

[ SUMMARY ]

At this point, you should have only one value in the registry at HKLM\Software\Microsoft\Bluetooth\A2DP\Settings:

UseJointStereo = 1

Your A2DP audio should be very good at this point - almost indistinguishable from a wired headset. However, if you are still unsatisfied with the sound (you may notice some very slight "hissing" or "swishing" sounds on high frequencies of certain songs), you may want to try the optional setting below.

[ OPTIONAL ]

Finding #3:

This is optional, and a matter of preference.

ADD the following value to the registry at HKLM\Software\Microsoft\Bluetooth\A2DP\Settings:
Name: SampleRate
Value (DWORD): 48000 (decimal)

This forces the A2DP stack to send the audio to the headset at 48000Hz instead of the default 44100Hz. For some reason, I find that the 48Khz value makes the "hissing" sounds less obvious. Your findings may vary, as some people may prefer the slightly more forward sound of the original setting. But if you are game, give this a try - one thing for sure is that it definitely changes the sound quality.

To reverse the change, just remove the SampleRate value.

If you make this 3rd optional change, you should have the following values in the registry at HKLM\Software\Microsoft\Bluetooth\A2DP\Settings:

UseJointStereo = 1
SampleRate = 48000

[ Note - Quick tip on registry editing ]

Of course, every registry change needs a soft-reset to take effect. And please take the usual proper care when editing the registry or risk damaging your device.

Find that your settings dont "stick" after a reset?
Make sure you reset the phone like this: After making changes to the registry, exit your registry editor. Then press and hold the power button of your phone for about 5 seconds, a window should pop up asking you if you want to shutdown your phone (click Yes). Once the phone has shut down, press and hold the power button for a few seconds until the phone starts up again.

Happy listening! BTW, I find that Mortplayer is an excellent MP3 player to use with A2DP. It works well with the control buttons on my headset.

[leo-chan]

Tried steps one and two... YAY! *throws away wired headset* :D Thanks guys!

[deviusdragger]

Well just when i thought my headset was sounding banging. now im gonna try this. Hope this helps. And awesome job on the findings guys. :D

[Sleuth255]

Yeah.... I remember that about bitpool/maxbitpool. Back when A2DP first came out on the Tornado we never set any of these. No values lets it dynamically adjust.

These are great settings btw. :)

[chrisnash]

Well I thought I was happy with my audio but I've just applied the tweaks and I'm listening to my favourite tracks and the improvement is great. youre right, the hiss has gone and although I hadnt thought it that noticeable before, this is so much cleaner.
I have the latest lsvw rom and and am running the new htc audio manager and I didn't think I would ever hear bass on my tytn!
And now I'm listening to my favourite Stevie Wonder track on wmv lossless in WMP and its fab!!!
Interestingly, I've just checked the reg settings after soft reset and the SampleRate key is gone!
I'll reapply it, soft reset and see what happens.
Many thanks for the info.

[chrisnash]

This time the samplerate stuck and it even better!

[Kikouyou]

Thanks much, this is outstanding!

[arunraaj]

Can Sleuth255 or anyone bless us, the poor smartphone users here who still suffer the 'hiss', by posting a A2DP patch from the latest WM6 ROM (like the previous Tornado A2DP patch) to install in our outdated WM5 devices? Please. The entire smartphone community here will thank you, if the patch free us from the terrible 'hiss' problem in WM5 roms.

[Ender666666]

Summary:

If you make all 3 changes, you should have the following values in the registry at HKLM\Software\Microsoft\Bluetooth\A2DP\Settings:

UseJointStereo = 1
SampleRate = 48000



PURE BRILLIANCE!!! I tolerated the hiss before as this device was my first with A2DP and I likened it to listening to the radio, but HOT DAMN it sounds fan-freakin'-tastic now!

Can anyone make a CAB file for this to make the edit easier for the general public?

[guapinoy]

Great job guys!!! Makes my 50 dollar Nextlink spider headphones great ;) No skipping too!

[Sleuth255]

Can Sleuth255 or anyone bless us, the poor smartphone users here who still suffer the 'hiss', by posting a A2DP patch from the latest WM6 ROM (like the previous Tornado A2DP patch) to install in our outdated WM5 devices? Please. The entire smartphone community here will thank you, if the patch free us from the terrible 'hiss' problem in WM5 roms.

We'd have to graft the entire bt stack onto WM5.... not an impossible task I suppose but not an easy one either....

[vp3G]

Great work on this, hardcore.

[basilrsa]

I have personally never had problems with quality on A2DP.
Sleuth 255 provided the fix with the earlier WM5 OS.
From AKU 3.3.1 the only registry fix was to set the Joint Stereo to 0
I had no problems with WM6 but the later releases definately had great improvements to the total BT stacks.
Well I am always ready to try new work by the members and respected cooks on this Forum.
Your work on the A2DP has blown me away!
The sound is phenominal to say the least.
I use Nokia HS-12W and HTC BH S100 BT Stereo headsets and both are great. But I must admit that the Nokia has the edge all round. Connect and all functions work great. With the HTC I always have to reset the "set as handsfree"connection to pick to the phone side through BT. The A2DP connects automatically. Just a small issue but irritating.

I could not do your edits with Resco and then tried TaskManager reg editor.
The changes would not stick on soft resetting using the phones reset switch.
Eventually I twigged that I could make the changes stick by using the TaskManager reset button in the program.

Thanks for the info. - this is really what XDA is all about!
Keep up the good work and I repeat the call for a cab fix. This will make your fix non lethal to noobs who are not fimiliar with reg editing.

[new2city]

Hi Hardcore,

Is Core2.0 considered a later WM6 ROM? Coz, Setting UseJointStereo to 1 does get rid of the hissing but unfortunately it also get rid of the Stereo on my Wizard...

[johnburn]

Excellent discovery, hardcore. After months of experimentation and cussing and swearing, this is the closest that my TyTN/Logitech FreePulse combo has come to perfect stereo audio. Still not as good as when I paired the FreePulse with an HP iPAQ with the Widcomm stack, but pretty damn close. I still get pops and clicks, which was new with WM6, but no skips or other artifacts. And I was almost ready to give up and look for another pair of BT headphones.

Interestingly, I did try removing the BitPool and MaxSupportedBitPool settings at some point during my experimentation, but this was either with an earlier WM6 build or with WM5.0, and the net result was no audio at all.

John

[hardcore]

Hi Hardcore,

Is Core2.0 considered a later WM6 ROM? Coz, Setting UseJointStereo to 1 does get rid of the hissing but unfortunately it also get rid of the Stereo on my Wizard...

Hi new2city,

What you described is the behaviour of the older ROMs. In the newer ROMS, you should get real stereo sound with UseJointStereo=1.

These are the Hermes WM6 ROMs I have tried which have the "good" A2DP: Black 2.5/3.0/3.0.1, CUSTEL 2.5, LVSW 05-07 and newer LVSW derivatives.

[porkchop83]

excellet work .... no hissing now


how do i fix this??
anyway when connected with A2DP mode, all incoming call ringtone will play to the stereo headset and the phone will not ring at all, (its as though the ringtone is diverted to the phone)

but if i switch it to headset mode (not A2DP), the ringtone will play on the phone and the headset with play a beep sound for incoming call.
I want it to be connected to a2dp and yet the ringtone still ring on my dopod phone...

[new2city]

Hi new2city,

What you described is the behaviour of the older ROMs. In the newer ROMS, you should get real stereo sound with UseJointStereo=1.

These are the Hermes WM6 ROMs I have tried which have the "good" A2DP: Black 2.5/3.0/3.0.1, CUSTEL 2.5, LVSW 05-07 and newer LVSW derivatives.

Hi Hardcore,

Just one question, in the Hermes, do you have the usual bluetooth dlls? SBC.dll, bta2dp.dll and so on? If so, any chance to upload them? I asked this before once almost a year ago but no one offered them... sigh...

Downloading Custel to hopefully extract the files.. gonna take a while...

thanks anyway.

[hardcore]

Hi Hardcore,

Just one question, in the Hermes, do you have the usual bluetooth dlls? SBC.dll, bta2dp.dll and so on? If so, any chance to upload them? I asked this before once almost a year ago but no one offered them... sigh...

Downloading Custel to hopefully extract the files.. gonna take a while...

thanks anyway.

Yes the sbc.dll and a2dp.dll exist in the ROM. However, I dont know how to copy them out from the ROM. Attempts to do it using Total Commander and Activesync have failed.

[new2city]

Got the dll's out of the Custel ROM I downloaded but unfortunately, I can't seem to replace the versions in my running rom as the files can't be overwritten OR copied in the windows folder. Any guys with a clearer picture willing to lend a hand. Been trying to fix this since I joined this forum...

[cuccureddu]

@Mods,

I think should this thread should be a sticky.

[mako111]

Tried these settings with my HERMES using a Sony HBH-DS970 (using Black 3.5 ROM). The UseJointStereo setting was set to 1 by default. I removed BitPool and MaxSupportedBitPool - this didn't make any noticeable difference.

Sound quality is just fine, however I get the pause every 60 seconds or so. Has anyone had success with the HBH-DS970?

Dbaser doesn't give much hope for these headphones over at http://www.4winmobile.com/viewtopic.php?p=62709#62709

[X_Farhad]

@mako111: just install Slueth's A2DP patch, there'll be no more skips ;-)

[basilrsa]

Find that your settings dont "stick" after a reset?
Make sure you reset the phone like this: After making changes to the registry, exit your registry editor. Then push the power button of your phone (putting it into standby, with the screen off). Wait for about 10 seconds (the phone will be saving the data to disk during this time), and only after that push the reset button.[/QUOTE]

Thanks for that advice. I eventually got my changes to stick , but by another method posted previously.
Regards

[convert]

.... except fantastic.....

... finally my phone sounds like an mp3 player!!

.. I stuck with bluetooth (I'm using a plantronics pulsar 260) because the 2.5 mm audio out socket on my old wizard died on me and at the time this was a cheaper option than a new phone.

Thanks for curious minds.

[alokhk]

damn! these settings are amazing! no hiss what so ever! thanks guys..

[spinefixr]

Friends, I have searched and googled and found other phones have this issue of playing videos and streaming audio over BT, but have not found any solutions.

My audio sounds great (especially with all the tweaks), but as soon as I play a video file (I usually watch podcasts like Crankygeeks or DL.TV which are downloaded and encoded via Windows Mediaplayer before syncing to my 8525) ...I get very choppy performance and frame rate drop when ONLY listening using BT headphones. As soon as I shut off BT and play through the speaker, all plays fine and smooth and framerate is normal, so it is like the processor is overwhelmed.

Does anyone know of any tweaks to fix this? Currently I am using Elf's 2.1, but this also happened with Fario's custom and Black Dymond roms too. It does it when nothing else is running and I have tested right after a clean installs.

I am using WM player as CoreCodec player does not see my WMV files for some reason.

Any ideas....thanks in advance.

[Menneisyys]

I have personally never had problems with quality on A2DP.


That's no wonder if you have the Nokia HS-12W ;) (it has always been 100% compatible with the MS BT stack, unlike the vast majority of other headphones - dunno about the HTC BH S100 though. See http://forum.xda-developers.com/showthread.php?t=296770 for more info if interested).

[Menneisyys]

Some reports on my WM6 Standard (Smartphone) HTC Vox: the sound quality remained the same as with the hacks discussed at http://www.modaco.com/index.php?showtopic=254179 . All this with the Pulsar 590A; on other headphones, there may be differences.

That is, the Widcomm is still better, even if the MS stack is getting closer.

[hardcore]

That's no wonder if you have the Nokia HS-12W ;) (it has always been 100% compatible with the MS BT stack, unlike the vast majority of other headphones - dunno about the HTC BH S100 though. See http://forum.xda-developers.com/showthread.php?t=296770 for more info if interested).

I have the Nokia BH-500, and can say for sure that it had the same hissing problems with the MS BT stack, up until the latest WM5 and WM6 AKUs.

I think the problem with the hissing in earlier AKUs was simply that the Joint Stereo function in the MS BT stack was broken. As a result, the hacks that the community has implemented were to set the stack to disable JS for "true" stereo, but due to the bandwidth limitations of A2DP/BT and the low complexity of the SBC codec, it could never have produced an acceptable sound quality without the additional compression that can only be achieved using JS.

Finally MS must have realized this and fixed the Joint Stereo in the stack, and now the quality is as good as it should be. I dont think it can get significantly better with the Widcomm stack. The only variable remaining would be the quality of the SBC encoder of MS vs Widcomm, and differences would be minor.

As a reference for comparison, my BH-500 headset comes with a Nokia USB adaptor, which I can plug into my PC (the PC detects it as a USB soundcard), and which streams the music wirelessly to the headset. It would be a reasonable assumption that this setup would produce the best possible quality you can get out of A2DP (no stack compatibility problems, since there is no BT stack involved on the PC). With JS enabled, the WM6 A2DP sound quality is virtually identical to the Nokia USB adaptor. So MS did something right in the current stack.

[Menneisyys]

I have the Nokia BH-500, and can say for sure that it had the same hissing problems with the MS BT stack, up until the latest WM5 and WM6 AKUs.

Thanks for pointing this out. I wouldn't have thought Nokia uses different electronics in their BH-500 than in their 12W. I've thoroughly tested the latter and found it working with excellent, flawless sound quality, even with disabled Joint Stereo (read: older MS BT stacks).


I dont think it can get significantly better with the Widcomm stack. The only variable remaining would be the quality of the SBC encoder of MS vs Widcomm, and differences would be minor.

Well, with my 590A, the differences are pretty easy to hear partiuclarly in titles with humans singing. The BH-500 may be a different animal - after all, the A2DP compatibility of the current headsets varies greatly. This is why, for example, the Pulsar 260 hasn't ever been able to deliver aceptable sound quality with the MS BT stack (haven't tested it with the latest WM6 ROM's though - only without joint stereo), while it's pretty OK with the Widcomm BT stack. The Nokia 12W, on the other hand, is compatible with both stacks and delivers exactly the same sound quality (even without joint stereo).

The BH-500 may be a different animal. Again, as headphones radically differ in compatibility, one can't really state enabling Joint Stereo does (or doesn't) result in a dramatical quality increase in ALL headphones. I'm absolutely sure the sound quality increase is pretty much negligible (if at all) with the 590A, but this, of course, doesn't mean the same is the case with all other headphones.

[xultar]

WOW. Un-freaking-believable.

Sweet man! Simply Brilliant.

[mullischlumpf]

Hi,

i have the problem with my Sony HBH970 that incoming calls not recognized by the headset. Is this a hardware problem from the headset or software problem by the phone?

[Menneisyys]

Guys, I've published an article on this subject; see http://forum.xda-developers.com/showthread.php?t=310438

[hardcore]

Guys, I've published an article on this subject; see http://forum.xda-developers.com/showthread.php?t=310438

Good stuff man. Spread the word!

BTW, since you're also an audiophile, I wonder if you notice any difference in WM6 for the MS BT stack, when setting the SampleRate to 48000, vs the default (SampleRate 44100). I find that the 48000 value performs better - there seems to be less hissing / audible artifacts. Not sure why, since logically 44100 should avoid resampling.

[new2city]

Hey Hardcore,

I am not really sure but right now I am on Pandora's 2.22beta for the Wizard which is based on mUn's 5.2.1413, so far on this ROM I have tried the settings you suggested, and yes, UseJointStereo=1 is still basically stereo but unfortunately the hissing is still there, even with SampleRate at 48000

I guess it must be my fussy Itech S35 then... but just to confirm with you, I think this ROM should be with the latest MS stack right? OR should I continue my search for a newer and better MS stack....

any other suggestions..

[Dishe]

Can someone PLEASE extract the drivers so we can install it on wm5 devices?

[new2city]

Hi Dishe,


I got the three files from Custel's ROM but can't get them to work, you got any ideas?

[Menneisyys]

Good stuff man. Spread the word!

BTW, since you're also an audiophile, I wonder if you notice any difference in WM6 for the MS BT stack, when setting the SampleRate to 48000, vs the default (SampleRate 44100). I find that the 48000 value performs better - there seems to be less hissing / audible artifacts. Not sure why, since logically 44100 should avoid resampling.

I couldn't really notice any difference with the 590A. This MAY be caused by the particular headphones model and MAY work different with other headphones model.

There is still some hissing (distortion) compared to the Widcomm implementation, but now it's acceptable for me (unlike with previous, pre-WM6 implementations).

[arunraaj]

Attached are dumped A2DP dlls from the Dopod Vox WWE rom. But when i copied these to my \windows folder of my startrek, found A2DP didn't work (music via WMP came from the external speaker). I think these dlls can't be straightly used in their original dumped form and may require some hex editing and cert signing to work. Could someone help to make the dlls working or come up with CABs like the previous tornado patch?

[Dishe]

We have to get some of the folks who've made patches in the past get involved...

[Hellsblade]

After applying the suggested registry settings, I'm left with two problems. First the sound quality improved considerably, but after a soft reset I only have mono sound. This was reported earlier by new2city.

Also for some reason the button on my HBH-DS970, which i used to start voice command with, now starts the phone, and only by turning bluetooth off and on, i get the the control back to listen to MP3's.

The ROM i use is a wizard variety called Crossbow Reloaded 1.7.

Any help would greatly appreciated.

[hardcore]

Hey Hardcore,

I am not really sure but right now I am on Pandora's 2.22beta for the Wizard which is based on mUn's 5.2.1413, so far on this ROM I have tried the settings you suggested, and yes, UseJointStereo=1 is still basically stereo but unfortunately the hissing is still there, even with SampleRate at 48000

I guess it must be my fussy Itech S35 then... but just to confirm with you, I think this ROM should be with the latest MS stack right? OR should I continue my search for a newer and better MS stack....

any other suggestions..

Hi new2city, unfortunately I only have a Hermes to try this out with, and on the newer Hermes WM6 ROMs (the last 2 LVSW and variants, as well as Black 2.5 onwards), the A2DP has been working great. Don't know about the Wizard.

Did you make sure to remove the BitPool values from the registry? (if you don't remove them, they limit the quality)

[hardcore]

Attached are dumped A2DP dlls from the Dopod Vox WWE rom. But when i copied these to my \windows folder of my startrek, found A2DP didn't work (music via WMP came from the external speaker). I think these dlls can't be straightly used in their original dumped form and may require some hex editing and cert signing to work. Could someone help to make the dlls working or come up with CABs like the previous tornado patch?

There could be some security features preventing the use of copied DLLs in the \Windows folder. Nevertheless, you might want to try replacing *only* the sbc.dll file and see what happens?

[arunraaj]

There could be some security features preventing the use of copied DLLs in the \Windows folder. Nevertheless, you might want to try replacing *only* the sbc.dll file and see what happens?

I tried this too, but no luck. :(

[jompao]

With the three fixes and Sleuth´s A2DP fix for fixing skipping sound is quite good on the HBH-DS970. Sounds even better then when I tried the Widcom stack.

I would certainly not call it flawless, but this is probaly as good as it will ever get with todays standards. Wired headphones are still way superior in sound quality.

[calancaster]

Friends, I have searched and googled and found other phones have this issue of playing videos and streaming audio over BT, but have not found any solutions.

My audio sounds great (especially with all the tweaks), but as soon as I play a video file (I usually watch podcasts like Crankygeeks or DL.TV which are downloaded and encoded via Windows Mediaplayer before syncing to my 8525) ...I get very choppy performance and frame rate drop when ONLY listening using BT headphones. As soon as I shut off BT and play through the speaker, all plays fine and smooth and framerate is normal, so it is like the processor is overwhelmed.

Does anyone know of any tweaks to fix this? Currently I am using Elf's 2.1, but this also happened with Fario's custom and Black Dymond roms too. It does it when nothing else is running and I have tested right after a clean installs.

I am using WM player as CoreCodec player does not see my WMV files for some reason.

Any ideas....thanks in advance.


I am experiencing the SAME problem when watching MobiTV and sometimes but to a lesser degree when listening XM Radio via my Motorola S9 Bluetooth Stereo headset. Has anyone figured out what is causing this or if there is a fix for this? By the way, I have an 8525.

[spinefixr]

Your post is the first response I think I have had. I still get it, just less evident using the Black Shadow rom for some reason. I hope someone has an idea how to tweak the settings for bluetooth and video.

[Dishe]

With the three fixes and Sleuth´s A2DP fix for fixing skipping sound is quite good on the HBH-DS970. Sounds even better then when I tried the Widcom stack.

I would certainly not call it flawless, but this is probaly as good as it will ever get with todays standards. Wired headphones are still way superior in sound quality.

Then you've never heard A2DP properly.
My logitech wireless ipod headphones paired with my Windows Mobile device sound better than most wired headphones I've owned (save for very expensive senheisers, but they cost most than any wireless headphones so its to be expected!).

Remember, its certain headsets that have this problem, whereas other (like the logitech ones) work flawlessly and sound great even with the first A2DP for tornado patch. It could be the wireless headphones you're using sound bad. No reason to judge the technology based on that.

[jompao]

Then you've never heard A2DP properly.
My logitech wireless ipod headphones paired with my Windows Mobile device sound better than most wired headphones I've owned (save for very expensive senheisers, but they cost most than any wireless headphones so its to be expected!).

Remember, its certain headsets that have this problem, whereas other (like the logitech ones) work flawlessly and sound great even with the first A2DP for tornado patch. It could be the wireless headphones you're using sound bad. No reason to judge the technology based on that.


Sounds strange to me that a lower priced A2DP headset would sound better then same priced wired headphones. Without tweaking A2DP in WM6 it would sound horrible on all headsets. Good for you that Logitech has such good quality. I would say HBH-DS970 is outperformed by wired earplugs for about 20% of the price.

[johnburn]

Remember, its certain headsets that have this problem, whereas other (like the logitech ones) work flawlessly and sound great even with the first A2DP for tornado patch. It could be the wireless headphones you're using sound bad. No reason to judge the technology based on that.

Unfortunately Logitech took a step backwards when they replaced their iPod headphones with the "second generation" FreePulse ones. My Logitech iPod headphones worked beautifully with my Wizard with the AKU that supported A2DP (can't remember which one it was). However, the FreePulse headphones with my TyTN, although "almost there" with this tweak, still have the occasional skip and I also hear static-like pops and crackles (just like old fashioned vinyl records) with WM6 that I didn't have with WM5.0. If it wasn't for Sleuth's A2DP Fix, I wouldn't be able to use them at all.

I didn't think that this was hardware related at first, because the same FreePulse headphones connecting via A2DP to an iPaq running the Widcomm stack sound absolutely heavenly. But now I think I am convinced, it is hardware related: Specifically certain headphones AND the Hermes. The same headphones may work fine with another device, but with the Hermes, no luck. I am about to go out and buy a Sony DR-BT21G to see if it is any better.

John

[chrisnash]

I've had my Jabra BT620's on 3 successive devices and on wm5 and wm6 and always been pleased with the quality, particularly now with Htc's wonderful audio manager.

[tallshorty]

Does these audio tweaks work in WM5?

[brianhn1]

Does anyone do audio streaming (internet radio stations) with any success?

Listening to mp3s through my Moto S9 works well and does not skip but when I turn on wifi, it starts skipping. Now if I use wifi to connect to an internet radio station, it barely works and skips all day.

[hardcore]

Does these audio tweaks work in WM5?

Most probably not in any WM5 version released up till now.

[afruff23]

Is black shadow 4.0 cosndiered one of the newer ROMS? Also, what's a good registry editor?

[MOHDWADEA]

Works great on my i-tech blueband stereo headphones. The sound is noticeably better. They are now STEREO headphones and sound like Stereo. Thanks. No skipping by the way..so far played 6 consecutive tracks in wma fromat encoded @ 64kpbs (reduced to get my music on my micro sd card). Once again thanks again for this.

[SkyyBoy]

Is black shadow 4.0 cosndiered one of the newer ROMS? Also, what's a good registry editor?

yes, black shadow is a "newer" rom (at least for now)

to regedit, use
Total Commander from http://www.ghisler.com/pocketpc.htm
DotFred's TaskMGR from http://forum.xda-developers.com/showthread.php?t=280104
PHM RegEdit from http://www.phm.lu/Products/PocketPC/RegEdit/
all the above are free :)

[tenorsaxman11]

My workday today was 10 times better with all my tunes (streamed and mp3) sounding so much clearer and nicer. Many thanks for this guide, it put to rest days of fiddling with the settings!!

[titus666]

Hey Hardcore,

I am not really sure but right now I am on Pandora's 2.22beta for the Wizard which is based on mUn's 5.2.1413, so far on this ROM I have tried the settings you suggested, and yes, UseJointStereo=1 is still basically stereo but unfortunately the hissing is still there, even with SampleRate at 48000

I guess it must be my fussy Itech S35 then... but just to confirm with you, I think this ROM should be with the latest MS stack right? OR should I continue my search for a newer and better MS stack....

any other suggestions..

I just upgraded my wizard with NBD 7.2 which has the same behaviour with my ITech S38 as well. It sounds exactly the same as WM5 with JS disabled and the samplerate set to 48000, but not in mono.. so something has changed in the WM6 bluetooth stack, but has not improved the sound with the ITech S35/S38..

[Dishe]

I just upgraded my wizard with NBD 7.2 which has the same behaviour with my ITech S38 as well. It sounds exactly the same as WM5 with JS disabled and the samplerate set to 48000, but not in mono.. so something has changed in the WM6 bluetooth stack, but has not improved the sound with the ITech S35/S38..

It has already been stated that the "cooked" roms, particularly the ones built off of the early builds and beta WM6 roms, had even WORSE a2dp drivers than WM5 (there's a thread of people who reverted back to WM5 just because of that).

since the Wizard never had an official WM6 build, chances are the one you used still has the poor beta rom BT stack.

Official devices (and hopefully soon some more of the cooked roms for other devices) SHOULD fix the problem, but I can't confirm this since I'm waiting to try it too.

[new2city]

Matt's Pandora's has the latest WM6 build from Mun. Meaning, music is still Stereo when UseJointStereo=1. But for my Itech's on my Wizard, the hissing is still there, so I am still stuck with lousy A2DP. Planing to try with Matt's InGenetic's Kitchen and see how it goes but my broadband is still down...

[newbro]

With my iTech-Clip R35, in WM5 jointstereo=1 will results in mono output, change to value 0 will results in stero output, but with very noticable hissing in the background. In fact it's so annoying I actually stopped using it and go back to the good ol' wired headset.

But this is not the case with the new WM6 rom. With Black Shadow rom jointstereo=1 seems to do the tricks and result in excellent stereo output. Everything works great now. Just my 2cents.

[new2city]

To newbro, you are using a Hermes, aren't you?

[b1inks99]

I've followed all your instructions but now I don't get any sound at all throught my headset. to give you some background on my phone its a unlocked Cingular 8525 running Faria XDAROM and my headset is a pair of motorola HT820. PLEASE HELP

[titus666]

It has already been stated that the "cooked" roms, particularly the ones built off of the early builds and beta WM6 roms, had even WORSE a2dp drivers than WM5 (there's a thread of people who reverted back to WM5 just because of that).

since the Wizard never had an official WM6 build, chances are the one you used still has the poor beta rom BT stack.

Official devices (and hopefully soon some more of the cooked roms for other devices) SHOULD fix the problem, but I can't confirm this since I'm waiting to try it too.

Yes, I understand and have read through those threads as well. I'm trying to gauge whether the new(est) BT stack should fix this, or whether there might still be a problem with the ITech. This is because with the newer WM6 roms available with the Wizard, when JS is enabled, the sound is NOT coming up as mono (unlike the WM5 BT stack), however the sound quality and tinny/hissing sounds are still present.

I did see a post today (Newbro) with an ITech R35 have gotten (much) improved A2DP sound after upgrading to WM6 and enabling JS. The guess is he is using a Hermes (this is a Hermes thread afterall!) and thus there is probably hope for the Wizard builds as well. I also have another particular interest as I was planning to buy a Hermes (Dopod 838pro) in the not too distant future.

[Dmon]

Followed the instructions and got really good sound over a2dp, however when I place a call I hear nothing but static. Set Joint Stereo to 0 and left the other settings and now I can place calls with good quality and listen to music, however I do think the music quality got a little worse. Anyone now how I can get around this and have good sound both for music and calls?

Using LVSW rom and Pulsar 260

Edit: After one more soft reset it seems I can make calls ok with Joint Stereo set to 1, but if I receive a call there is nothing, not even static.

Edit: Well now it just works. Don't really know why it suddenly started working but I'm not complaining anymore...

[titus666]

Yes, I understand and have read through those threads as well. I'm trying to gauge whether the new(est) BT stack should fix this, or whether there might still be a problem with the ITech. This is because with the newer WM6 roms available with the Wizard, when JS is enabled, the sound is NOT coming up as mono (unlike the WM5 BT stack), however the sound quality and tinny/hissing sounds are still present.

I did see a post today (Newbro) with an ITech R35 have gotten (much) improved A2DP sound after upgrading to WM6 and enabling JS. The guess is he is using a Hermes (this is a Hermes thread afterall!) and thus there is probably hope for the Wizard builds as well. I also have another particular interest as I was planning to buy a Hermes (Dopod 838pro) in the not too distant future.

FYI that Zoki has put in the latest Bluetooh & A2DP drivers in NKD 7.3 for the Wizard, and my ITech now has much improved sound.

[mrvanx]

Is it quite common that WM5/6 doesnt support certain A2DP devices??

I bought a jabra bt320s A2DP headset, when i come to pairing the thing the only service listed is Handsfree...ive tried it on ALL the WM6 ROMs aswell as an older AKU 3.3.1 ROM last night.

The headset isnt faulty as it will quite nicely stream sound from my PC aswell as other devices.

My hermes will recognise my car stereo (Sony MEXBT5000) as wireless stereo and works fine on that??

Any ideas??


EDIT:: LOL!!!!! Jabra support seems to think the Hermes doesnt support high quality audio (aka A2DP).....i smell bullshit!

[obsydian]

It made a very worthwhile improvement on my Wizard, still some residual hiss/tizz on vocals.

However, I am left with one extra setting as opposed to the two:
UseJointStereo = 1
SampleRate = 48000

Additional key value that seems default that i cannot delete ?

[Hellsblade]

I just tried the (wizard)NBD 7.3 ROM to compare the BT stack with the TNT 2.0 version wich gave me the mono effect changing the jointstereo=1 parameter.
I can not hear any quality improvement or difference between these two ROM's on my SonyEricsson HBHDS970.
Also the SampleRate parameter does nothing for me.

[MontAlbert]

ok stupid question- when you say remove the value it means to delete the key totally?

[johnburn]

For those that might be using the Logitech FreePulse headphones (successor to the weak-banded Logitech Bluetooth Headphones for iPod/MP3). After considerable testing, I recommend that for best quality audio you need to do the following:

1. Install Sleuth's A2DPFix program. Without it, you will get constant skipping regardless of what else you do.

2. Set JointStereo to 0. With JointStereo set to 1, you get a weird cross-channel "digital echo" effect -- kinda reminds me of the DSP effects on home stereos to fake different environments. To really hear this, play the Tom Petty & The Heartbreakers song Louisiana Rain. At the very beginning is what sounds like an old fashioned mechanical clock winding down in fast motion which only plays in the left channel. With JointStereo = 0, the right channel is silent (as it should be). With JointStereo = 1, you hear a buzzing echo in the right channel.

3. Adding the SampleRate = 48000 DWORD key does improve quality slightly, but seems to make the music more likely to skip when the phone radio is active in the background (e.g. switching from one cell to another). So I left this out.

That's the best I have been able to accomplish with these headphones. Nevertheless, you will still experience occasional skips (especially at the beginning of songs when jumping from one song to another) and you will also hear occasional "crackles" and "pops", just like old fashioned vinyl records. I guess Logitech took some shortcuts when they implemented Bluetooth in these headphones (they much worse than their predecessors, unfortunately). I wouldn't recommend them to anyone using a Hermes.

John

[gauravdc]

Thanks guys....the settings worked great...now i can finally enjoy great sound on my ht820s!!!

Note to mods: i think this post deserves sticky status!

[ITAdmin]

Ok, I've only had my 8125 for 8 months and had to get it replaced because the mini headphone jack in the phone became so loose that the plug would fall out. I use this in my vehicle to play recorded audio dialogue and it plugs into the aux jack on my Pioneer 9800BT stereo.

This unit has A2DP capability, but my 8125 doesn't. I investigated this issue months ago, but found there was nothing available, short of installing a hacked ROM, which I don't really want to do.

Has anything new come up? Is there an updated ROM for the 8125 yet? I don't understand why this feature isn't available, as it sure seems to be a great function. With that, I wouldn't have to use the jack on the 8125 to play audio. It’s only a matter of months before the jack wears out again and by that time, the warranty will be expired and Cingular/ATT doesn’t offer an extended warranty for PDA’s/PPC phones!

I know it will work because I can use my Jabra BT earpiece while the audio is playing and when I press the connect button, I get clear audio through the earpiece, but it only lasts a couple of seconds. I did try to add some kind of hack to the previous 8125 I had, and it did sort of work, but once the phone rang or I made a call, the audio would skip and I had to restart the whole thing until the phone rang again. No good :-(

Any ideas would be GREATLY appreciated!

I followed a link to this thread from another site where I posted this same question. I hope that's OK? If not, delete one or the other!

Thanks mucho!

ITAdmin

[Dishe]

Cingular (att, whatever) has all but abandoned that device. They've got newer devices to support, so I doubt you'll see any new updates for what they consider an obsolete phone.

That being said, it is MORE than capable if you're willing to install a few things to make it work.

If the latest 8125 rom is at least AKU 2, you may not need to install a "hacked rom" at all, but rather just a patch to enable a feature hidden already in your rom.
read the "a2dp for tornado" thread for more info.

Between you and me, I wouldn't bother hesitating with the hacked roms. My experience is that they are usually far better than the original carriers rom in every regard except support from the carrier. But you can always switch back if you don't like it... its really a lot easier than you think.

[ITAdmin]

Ohh Thank You, Thank You, Thank You!!! What a great response.


What do you think of Faria's WM6 ROM? Would that be a better choice? I have no problem altering original firmware on any kind of device, but I want to be sure the reward is worth the risk. My MAIN goal is to get the A2DP to work on my Pioneer 9800BT Car Stereo. Any benefits above that are icing on the cake.

Let me know what you think about the Faria ROM and I will start reading again on the AKU for the Tornado. It really sucks when you spend a crapload of $$ for a device, and it won't do what you want it to. I really wish all engineers would be required to work in the real world before they start designing stuff! I could tell you some horror stories from my days working on jet aircraft and nuclear power plants!! Ohh Boy!!

Thanks again!!


ITAdmin

[agoyeneche]

Settings are great. However I still have a problem: When playing m4a (aac) files, the phone swithces back to the speaker. It works great with mp3s but I've read many people have the same problem. Has anyone found a solution?

[Alfiegerner]

Settings are great. However I still have a problem: When playing m4a (aac) files, the phone swithces back to the speaker. It works great with mp3s but I've read many people have the same problem. Has anyone found a solution?

I've read somewhere that the bluetooth implementation used on most (all?) phones supports only a limited set of encodings, possibly even only mp3.

[aameerp]

thanks man this does make a lot of difference

[tallin32]

I can't seem to get this to work--at least, not on the TNT 3.0 Official ROM running on Wizard. Setting UseJointStereo definitely gets rid of the hissing, but the audio is definitely mono. Is there a Wizard ROM ou there that definitely has the A2DP fixes in to allow joint stereo on Wizard?

[new2city]

try NBD 7.9 Works great and with Touchflow activated..

[kinggorman]

This worksflawlessly on my Apache with a cooked WM6 rom using Motorola S9 headset...beautiful sound...thank you.

[PiotrM]

would like to thank you guys for the work, firs time BT user ang the fix is.. beautiful, the music filling my Moto HT820 is just sweeeeet :D

Thx

//Piotr

[Videonut]

EDIT...If you used my program before, please download and run this one. Under certain conditions a value may have been written wrong or not at all.
You can also manually check HKLM\Software\Microsoft\Bluetooth\A2DP\Settings\de fault and make sure the value says Value Not Set

I wrote this program to make all the registry changes to HKLM\Software\Microsoft\Bluetooth\A2DP\Settings simple and fast.
UnZip and run from your desktop to install on your device. I can try to upload .cab if anyone wants.
Tested on ppc6700 only

When started all your current settings will be displayed. Write them down if you want to go back to them.

UseJointStereo can be set to 0,1 or 2

Bitpool and MaxSupportedBitPool can be erased with a simple unchecking of their checkboxes or if their boxes are checked the values in the text boxes will be written.

SampleRate is set at 48000 if checked, or erased if unchecked.

Press "Write" when you've made your changes and all settings will be written.
After writing values press "Read Registry" to make sure your entries were made correctly.
Exit program when values are written and reboot.
Works fast, except for reboots of course.

[viperx]

These settings are great.
I'm using HTC p3600 and Nokia BH-501.
Not sure whether the SampleRate DWORD has done me much though.

[christian15213]

you guys are alll great, these setting are for wm6 though.

I am trying to use my Bt headset as a microphone on my pc i.e. for skype and it has the horrible crackle crackle sound. i don't know if it is pc registry settings or motorola S9 problem? any help or link would be greatly appreciated. right now I am going to try and use my jabra's to see if they can work.

[HasC]

Just installed these settings on my Kaiser (MDAIII uk) using a Plantronics Pulsar 260 and also tested on a Jabra 320s, and the improvement is HUGE!!!! The hissing has disappeared, used the .exe contained in the zip file above.

Also before installing this patch, call volume was very low when making or receiving calls, now it is absolutely fine and callers hear me very clearly on the other end and are surprised that I am speaking on a handsfree!!!

Thanks to all and especially hardcore & Videonut!!! keep up the good work.

[Dishe]

Now the real question is can anyone figure out what changed from the WM6 Beta or WM5??? Can we port this "fix" to older versions of the OS?

[vickoy]

EDIT...If you used my program before, please download and run this one. Under certain conditions a value may have been written wrong or not at all.
You can also manually check HKLM\Software\Microsoft\Bluetooth\A2DP\Settings\de fault and make sure the value says Value Not Set

I wrote this program to make all the registry changes to HKLM\Software\Microsoft\Bluetooth\A2DP\Settings simple and fast.
UnZip and run from your desktop to install on your device. I can try to upload .cab if anyone wants.
Tested on ppc6700 only

When started all your current settings will be displayed. Write them down if you want to go back to them.

UseJointStereo can be set to 0,1 or 2

Bitpool and MaxSupportedBitPool can be erased with a simple unchecking of their checkboxes or if their boxes are checked the values in the text boxes will be written.

SampleRate is set at 48000 if checked, or erased if unchecked.

Press "Write" when you've made your changes and all settings will be written.
After writing values press "Read Registry" to make sure your entries were made correctly.
Exit program when values are written and reboot.
Works fast, except for reboots of course.

quick question... sorry to ask!
what does 0, 1, 2 stands for in UseJointStereo setting of A2DP?
which one among them is Mono or Stereo? does it means disable or enable? LoL:D
thanks!

[Videonut]

quick question... sorry to ask!
what does 0, 1, 2 stands for in UseJointStereo setting of A2DP?
which one among them is Mono or Stereo? does it means disable or enable? LoL:D
thanks!

0 and 1 should give you true stereo. I think 1 is the WM6 default. I only put 2 in as an option because someone thought it worked for them.

[crazy_babar]

Yeah!
I buy the Logitech FreePulse for my HTC S710 / SPV E650

i connect it to my phone, and grrr, WTF? BOUMcrr BOUMcrr (not a good sound)

and with your help, now it's amazing!
thanks a lot (and sorry for my bad english!)

[MegaTesla]

I have an HTC P4350 Herald with WM6 and a Jabra BT620s headset.

Initially it sounded like crap and then I started changing/deleting the values in the registry like everyone suggested.

There is no combination of values that gives me good sound without skipping.

Deleting BitPool and MaxSupportedBitPool or values below 46 = no skipping but higher frequencies and 's' sounds doesn't sound good.
BitPool between 46 and 56 = music sounds good but skipping twice every minute.
BitPool above 56 sounds awesome but it skips a lot.

UseJointStereo = 0/1 and SampleRate doesn't make any major difference.

Pairing works fine as does incoming calls etc.

Overclocking doesn't help. I've tried Audio Manager, Media player and TCPMP.

[e_gregious]

I have an HTC P4350 Herald with WM6 and a Jabra BT620s headset.

Initially it sounded like crap and then I started changing/deleting the values in the registry like everyone suggested.

There is no combination of values that gives me good sound without skipping.
[Clip]


I have a Jabra BT8010 and it has plagued me constantly with skipping. (Doesn't happen with my BlueAnt X5, but they are too heavy to wear when out walking)

I followed the long procedure as detailed here (http://forum.xda-developers.com/showthread.php?t=301764&highlight=A2DP+bluetooth) and it fixes it for me.
Unfortunately, when I upgrade my ROM I forget to go through the process again, and I'm left with crappy BT again - my fault for fiddling, I guess. This topic is now a permanent bookmark on my browser.

[m8cca]

UseJointStereo = 1 & SampleRate = 48000 works great on my Samsung Blackjack (SGH-i607) WM6 official ROM and Kyocera Bluetooth Pendant. Pretty much gave up on getting rid of hisses on the headset and had not use it much since buying it a year ago till I recently upgraded to WM6 and pull the pendant out to try again.

Music much more enjoyable now. Thanks!

[marcinsoo]

hi guys

i got treo pro with wm6.1, and bt headset bt3030
i deleted maxbitpool, bitpool (joint stereo =1 was already set) as was suggested on previous pages

during listening a music headset works perfect, when i receive a call - and then after call is ended - music is too low (quality also) i think as if bitpool was set = 20

restarting pocket tunes nothing changes, the only way to resume normal quality of music is restarting phone !!! i almost throw my phone by the window !

can anyone help ? any solutions ?

many thanks in advance
martin, soo2@o2.pl

[pdaod]

I tried the 48000 SampleRate setting on a Mogul (still running WM6) using a Pulsar 590e headphone. What I found was that while it does reduce some distortion, it does so with a significant hit to the upper mid to high frequency audio response. I made a 2 channel mono frequency sweep .wav file 20hz - 20khz @-20db with 20hz, 50hz, then 100hz steps from 100hz to 1Khz and then 1Khz steps up to 20Khz. I played this using WMP with and without the registry key. Without the SampleRate setting it had good response all the way through. With SampleRate=48000 the tones started to become very aliased at 5khz and were pretty much lost above that with only aliasing remaining. There's very little of anything by the time it gets to 10khz. I attribute this to less than optimal filtering for the sample rate conversion.

If I use the joint stereo, then I get distortion on audio that is mixed to one channel only (common on older recordings). The artifact sounds similar to FM stereo muiltipath distortion. If I don't use joint stereo the audio that is in the center has some distortion. The BitPool settings don't seem to help much. I've tried 48/52. 52/52, and even really high at 82/86. I currently have them set to 58. I've tried using the 590e on my Dell notebook with a Toshiba BT stack and it sounds much better.

[ccuser]

I tried the 48000 SampleRate setting on a Mogul (still running WM6) using a Pulsar 590e headphone. What I found was that while it does reduce some distortion, it does so with a significant hit to the upper mid to high frequency audio response. I made a 2 channel mono frequency sweep .wav file 20hz - 20khz @-20db with 20hz, 50hz, then 100hz steps from 100hz to 1Khz and then 1Khz steps up to 20Khz. I played this using WMP with and without the registry key. Without the SampleRate setting it had good response all the way through. With SampleRate=48000 the tones started to become very aliased at 5khz and were pretty much lost above that with only aliasing remaining. There's very little of anything by the time it gets to 10khz. I attribute this to less than optimal filtering for the sample rate conversion.

If I use the joint stereo, then I get distortion on audio that is mixed to one channel only (common on older recordings). The artifact sounds similar to FM stereo muiltipath distortion. If I don't use joint stereo the audio that is in the center has some distortion. The BitPool settings don't seem to help much. I've tried 48/52. 52/52, and even really high at 82/86. I currently have them set to 58. I've tried using the 590e on my Dell notebook with a Toshiba BT stack and it sounds much better.


I recently put in new ROM in mogul. I attempted to try other BT A2dp settings posted all over the place but none worked as good as these settings. Most of resco recorded mp3 play very well over bluetooth. although I didn't try as advanced testing as u did.

[isheriff]

but until recently i changed the input boot some thing and it wont boot,it gets stuck in the boot loader please help!
the phone i am using is htc 8125, can i boot form a external rom/sd card and the flash the phone!

Please give me some options!

[elliot.necros]

Wow, this is great!!!! I thought my BT1.2 Jabra BT3030s were to blame for the crappy audio, but I can hear every nuance of Stings "Mad About You."

[SinnerNL]

Anybody got any ideas how to TURN OFF windows media player dominance over my bluetooth headset??

I want to use it with pocketplayer, but it is somehow married to media player :S

[milinko81]

I have the same problem...??? on HTC Touch HD play always wmplayer not in my case s2p.....

[Usexy]

Anybody got any ideas how to TURN OFF windows media player dominance over my bluetooth headset??

I want to use it with pocketplayer, but it is somehow married to media player :S

Same problem, can anyone help? :(

Thanks

[urfiend]

Same problem, can anyone help? :(

Thanks
same with me - my jawbone icon connects without any problems but my bluetoothcarradio disconnects after a few seconds of playing again and won´t reconnect.

tip: pause windows media player and activate the player u want instead - work for me with kinoma player.