Given the extensive posting about A2DP on the Wizard, I was a little bit surprised not to find anything about this problem:
When streaming music from windows media player, the sound sometimes starts playing back slower or faster - thus changing the pitch. Sometimes as much as a step and a half (like from C to A). Clearly noticable in other words.
Now is this because of the Wizard, or the Jabra BT620s? I googled, and I found one other person complaining about something similar - but when using an iPod.
With default settings, I was getting drop-outs every 2 or three minutes...
I was able to tweak reg settings some:
A2DP\Settings\BitPool = 45 (60 sounds great, but only for a few seconds)
Drivers\BuiltIn\BtA2dpSnd\Priority256 = 60
AudioGateway\Capability = 69
I use Shogunmark's Cingular based 2.26.10.2 ROM.
Any thoughts?
Hey I'm getting the same effect with my NextLink Spider stereo bluetooth set...
Something tells me its just the processor speeding up and down, or something with the transfer to the headsets and codecs. I wanted to check whether it was VBR music files (variable bit rate) that were doing it, but since that usually only affects quality I don't think it is related.
Its obviously not a big deal, it can be kinda funny sometimes =P ... but I am curious as to why its doing that and if it can be corrected !
So basically I'm just lettin ya know you're not alone with the ipod guy!
(I have a cingular 8125, and I just switched over to a tmobile MDA (8125 is waaay to bulky), so i'll let you know if the new phone does it too!)
Good to know it also happens on the MS BT stack. This is a common problem with pre-WM5 Widcomm-based devices (see my A2DP-related articles).
Ok, so I'm not alone... Funny how that makes me feel better.
I'm still looking for a solution to all this. I guess if this is because of bandwidth limitations, it would make sense to lower the BitPool setting.
I'm going to try to dial in the best settings, by trial and error...
I sure hope MS can improve the BT stack some more.
this is to do with the buffer,when the muisic stops because of interference the wizard carryon sending the muisic to the buffer,problem is the when the interference stops the muisic track is seconds ahead of the buffer ,so the muisic is rushed out in order to receive new data.this seems to be a problem with the proccessing units in the headphone and not in the ppc itself.this also happens in aku3 roms.
yup i got the same prob... i took it that it was the headset and not the xda, the slowing down i thought was it thinking hmm im running out of music so ill slow down until i get some more so this guy can still hear something damm anoying im finding the whole bluetooth thing not worth the hastle.
All i want to be able to do now is get talk button on the wired headphones to start up the voice dial and then i can have what i want just with a wire.
faria said:
this is to do with the buffer,when the muisic stops because of interference the wizard carryon sending the muisic to the buffer,problem is the when the interference stops the muisic track is seconds ahead of the buffer ,so the muisic is rushed out in order to receive new data.this seems to be a problem with the proccessing units in the headphone and not in the ppc itself.this also happens in aku3 roms.
Click to expand...
Click to collapse
Hmm, yeah that was my thought as well. It reminds me of old tape based Walkmans with bad batteries.
Does anyone know the equation behind the BitPool registry entry? At 30 vs 45, the sound quality is pretty bad, but with less pitch changes and / or dropouts. At 60 the sound is fantastic for a few seconds before the problems start. It appears that even increments of 15 (i.e. 30, 45, 60) at the time works better than numbers like 34 or 42 - it results in more conversion artifacts. I assume the BitPool settings determine Bit resolution and Sample rate...
Right now, I'm listening to internet radio at 64Kbps with no problems. So as far as I can tell the lower bit rate sources work better. Maybe also fixed bit rate over VBR.
Oh, and what is the AudioGateway\Capability number for?
With my current settings 128Kbps files play fine, but 160Kbps files do pitch change thing...
Related
I have been listening to music for the last 30 mins or so. I am using my Anycomm stereo BT headphones and the new ROM, but quite annoyingly with my wizzard only 50 cm or so away from me, it keeps cutting out the sound. I wondered if it was anything to do with lack of memory or other programs running and using cpu so I stopped all other relevant programs, but it is still doing it.
anyone else having these probs?
PvH
I noticed same problem it looks that wizard have very weak anthena for bluetooth it looks to be worse than class b specification for that. At first i thought that it's problem of my headset but it happens for me on other ones too.
I got the Motorolla BT headphones, paired them. With jointstereo = 1, i got mono sound, but there was no high pitched clipping. I disabled it, and set the quality to "exellent" via the hermes tweak program. I am getting stereo, but Im also getting very high pitched clipping sound, which makes any song virtually un-listenable due to the high pitched noise on the high notes. I also tried applying the reg values seen here: http://forum.xda-developers.com/showthread.php?t=284974 with no apparent result.
I am using a SonyEricsson stereo BT headset and the sound is reasonably good. The only thing I tweaked is that I set the jointstereo key to 0.
Try to find the right combination of volume in both devices, it might improve things... Clipping could be in your headphones because the signal from the Trinity is too high?
No that wont/didnt help. Its there even at the lowest sound setting. Its really noticable on about 70% of the songs, the other 30% are more or less ok. I tried removing higher frequences via an EQ in TCPMP, but the clipping is present on all frequencies.
The headset is totally useless for skype as well. Its so choppy, you cant understand anything.
Why is trash like this released?
I have the very same problem with iTech S35 headset...
No way to find a right combination of BitPool value an MaxBitPool value...
The problem is the MS BT stack. In my previous PDA Magician I installed Widcomm BT stack whit excellent results.
Now I'm waiting for the Widcomm BT stack development, hope to solve the problem.
Look at Hermes forum. Superdave is working on it...
Im thinking of getting the Jabra headphones, because people claimed that they have no high pitched noise.
Tested (I have loads of other A2DP devices and a high-quality A2DP heapdhone - the Plantronics Pulsar 590A) the Trinity in stereo mode instead of the default mono. Awful, in no way better than AKU2...
Trying to use the DS-970 from SE, but when setting the joint stereo to 0, the clipping comes, unless I use bitpool as low as 30, and the sound is then terrible! *argh* And with joint stereo, the highest bitpool I can use is 34, more then this and it starts to skip... *argh*
Tried almost everything, but I can't get it to stream out full stereo! *argh argh*
[HKEY_LOCAL_MACHINE\Drivers\BuiltIn\WaveDev]
Priority256=149
"IClass"="{A32942B7-920C-486b-B0E6-92A702A99B35}"
"Order"=0
"Index"=1
"Dll"="wavedev.dll"
"Prefix"="WAV"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Bluetooth\A2DP\Settings
UseJointStereo=1
MaxSupportedBitPool=34
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Bluetooth\AudioGateway]"Capability"=37
"BTAGExtModule"="BTAGExt.dll"
"SupportCLI"=0
"BTAGPBModule"="\Windows\BthAGPhonebook.dll"
"NoRoleSwitch"=1
Menneisyys said:
Tested (I have loads of other A2DP devices and a high-quality A2DP heapdhone - the Plantronics Pulsar 590A) the Trinity in stereo mode instead of the default mono. Awful, in no way better than AKU2...
Click to expand...
Click to collapse
I also have 590A. After manually setting joint stereo to 0 i got stereo but not a very good quality sound plus occasionally skip mainly when using headset buttons.
Today I did a hard reset and installed fit4cat hermes tweaks program. I enabled stereo, set the sound to Excellent, did a soft reset and... the sound is great, no more skipping. Much better sound quality than with the joint stereo hack alone.
Still not as good as the mp3 player on my se p900 but getting closer.
update: 5-6 hours of continuous music listening until now and still no problem. hermes tweak program did a good job for me
Skipping problem is easily fixed, while the high pitched clipping is not.
Its horrible.
Your problem is related to the headset you're using or maybe software version. I have no pitching sound issues.
mihaig said:
I also have 590A. After manually setting joint stereo to 0 i got stereo but not a very good quality sound plus occasionally skip mainly when using headset buttons.
Today I did a hard reset and installed fit4cat hermes tweaks program. I enabled stereo, set the sound to Excellent, did a soft reset and... the sound is great, no more skipping. Much better sound quality than with the joint stereo hack alone.
Still not as good as the mp3 player on my se p900 but getting closer.
update: 5-6 hours of continuous music listening until now and still no problem. hermes tweak program did a good job for me
Click to expand...
Click to collapse
Did the same with my 590A + Trinity (that is, behind the curtains, 58 to BitPool). Unfortunately, the same clipping in highs...
May be a firmware difference between our 590A. What's yours? Mine is:
Date code: A06
SW: SB
Hmm, I tried the tweaker and got a terrible sounding treble. Very compressed and metallic. I then turned it off and soft reset, but the terrible sound is still there! What are the original settings?
Also got Plantronics Pulsar 590.
Date Code: K06-B
SW: SB
Well, I just got the Jabra headphones.... same problem. Im very disappointed with this A2DP crap....
To handle a decent quality audio stream, you only need 128kbps of bandwidth. Bluetooth is suppose to handle 10x that.
I have the Motorola HT820 headphones and the cingular 8525. This combination also produces the high pitched noise when jointstereo is off. I am tempted to try flashing the firmware using the method here would help: http://forum.xda-developers.com/showthread.php?t=276406&highlight=ht820
Chances are, you got the latest version (D), so flashing wont do anything. The problem is with the MS BT stack.
Menneisyys said:
Did the same with my 590A + Trinity (that is, behind the curtains, 58 to BitPool). Unfortunately, the same clipping in highs...
May be a firmware difference between our 590A. What's yours? Mine is:
Date code: A06
SW: SB
Click to expand...
Click to collapse
Mine is Date code: J5
SW: SB
I am very pleased with the sound and electronical part BUT my headset plastic broke on both sides. The silver parts where the black plastic enters (so you can adjust the headset on your head) are both broken now. I can't believe how poor this plastic is. I also noticed other cracks appearing around the metal pivots.
Did anybody else experienced these problems?
yegor said:
Chances are, you got the latest version (D), so flashing wont do anything. The problem is with the MS BT stack.
Click to expand...
Click to collapse
In the meantime, I've discovered some headsets (for example, ALL Plantronics headsets) are plain incomatible with the MS BT stack, while some other headsets (for example, the Nokia HS-12W) arent.
This is why some people report excellent sound quality and some awful.
mihaig said:
Mine is Date code: J5
SW: SB
I am very pleased with the sound and electronical part BUT my headset plastic broke on both sides. The silver parts where the black plastic enters (so you can adjust the headset on your head) are both broken now. I can't believe how poor this plastic is. I also noticed other cracks appearing around the metal pivots.
Did anybody else experienced these problems?
Click to expand...
Click to collapse
nope, no cracking problems here.
Hello XDA-Devs and Readers
I bought a cheap BT-Stereoheadset (39,90€) (Callstel "Neck Comfort").
It seems working, I even get no skipping with the original german Eplus-ROM (see my other threads for more info about the ROM). Unfortunately I found two more or less major probs:
The first and the biggest for me is, that the music sounds really bad, it comes in Stereo but it sounds in the higher frequencies like a <32kbit MP3, something like a noise in the connection. Its really annoying and hurts in the ears. The second prob I found is, that the calls come only on the left side. Even the cable-headset that came with the TyTN plays calls on both sides, good for noisy enviroment.
Is there any help or can I just return the headset to PEARL? As I said, skipping in the way I understand the word wasn't a problem. I even could let the phone lie in a other room and the music still played without any stops.
kind regards!
Nobody? No idea?
Hi,
I recently got a set of Sony Ericsson HBH-IS800 Bluetooth headphones.
They're really slick and really convenient, but the sound quality I'm getting from the standard mp3 player just isn't great. There's quite a lot of noise, to the point that it is distracting.
I have used Sony in-ear phones for years, and IMO they're pretty good. These are significantly lower in quality, but I can't believe it's a hardware issue, Sony wouldn't have made a set of premium phones that much worse than all their wired equivalents.
I also know the player is capable of better quality, as I've used it with wired headphones.
Any clues on how to improve the BT audio performance? I can't believe this is as good as it can get.
Thanks in advance for any help - I'm sure you guys will come up with the goods
if you go HERE http://montecristoff.webs.com/hdtweak.htm and download the HD tweak....once youve installed the .cab onto ur phone and started it, there will be a choice to tweak some of the settings for your bluetooth...and im sure it will solve ur problem. the program has so many tweaks..its great, i use it myself.
Petee said:
Hi,
I recently got a set of Sony Ericsson HBH-IS800 Bluetooth headphones.
They're really slick and really convenient, but the sound quality I'm getting from the standard mp3 player just isn't great. There's quite a lot of noise, to the point that it is distracting.
I have used Sony in-ear phones for years, and IMO they're pretty good. These are significantly lower in quality, but I can't believe it's a hardware issue, Sony wouldn't have made a set of premium phones that much worse than all their wired equivalents.
I also know the player is capable of better quality, as I've used it with wired headphones.
Any clues on how to improve the BT audio performance? I can't believe this is as good as it can get.
Thanks in advance for any help - I'm sure you guys will come up with the goods
Click to expand...
Click to collapse
Try increasing the BitPool in HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Bluetooth\A2DP\Settings or by using software like sktools
You have to chnage the bitpool value in the registry:
HKLM/Software/Microsoft/Bluetooth/A2DP/Settings
Bitpool put 48 or 58 (the higher the better) but 58 might be too much for the IS800 and it might stutter.
UseJointStereo put 0
I have the same headset and problem. It sounds terrible for such a premium headset. My old Sony HBH-DS980 headset sounds so much better than the IS800. I really hope this isn't a hardware problem. I'm going to try to tweak to see if that helps.
Edit: I tried the tweak and it doesn't make a difference. If I cannot figure out how to make it sound better, I might end up returning it. It's not worth the price I paid for it.
Can you also let me know if the right side sounds louder than the left side on your headset? Mine seems to have this problem.
starbuck123 said:
Edit: I tried the tweak and it doesn't make a difference.
Click to expand...
Click to collapse
What do you mean by "tried" ? Have you edited "Bitpool" parameter to "High" ? Have you soft reseted ?
Increasing Bitpool does an audible difference. By default, it is too low, and stereo Bluetooth sound horrible (noise and high pitch distortion).
But, by increasing it, you may have skip or stutter.. I posted another thread with my troubles with Bitpool vs skip.
Logan5 said:
What do you mean by "tried" ? Have you edited "Bitpool" parameter to "High" ? Have you soft reseted ?
Increasing Bitpool does an audible difference. By default, it is too low, and stereo Bluetooth sound horrible (noise and high pitch distortion).
But, by increasing it, you may have skip or stutter.. I posted another thread with my troubles with Bitpool vs skip.
Click to expand...
Click to collapse
Is "SampleRate" the same as "Bitpool" I don't have a "Bitpool" setting under settings. I changed the samplerate to "58000" and jointstereo to "0".,did a softreset and it made no difference in sound quality/volume. I'm beginnning to think it's a hardware problem. I didn't have this problem with my previous bluetooth headset.
starbuck123 said:
Is "SampleRate" the same as "Bitpool" I don't have a "Bitpool" setting under settings. I changed the samplerate to "58000" and jointstereo to "0".,did a softreset and it made no difference in sound quality/volume. I'm beginnning to think it's a hardware problem. I didn't have this problem with my previous bluetooth headset.
Click to expand...
Click to collapse
This is not good. Bitrate should be 44100 or 48000 only and has little effect on listen quality. You have to change "Bitpool". HD Tweak does have Bitpool parameter. Keep searching.
Logan5 said:
Increasing Bitpool does an audible difference. By default, it is too low, and stereo Bluetooth sound horrible (noise and high pitch distortion).
But, by increasing it, you may have skip or stutter.. I posted another thread with my troubles with Bitpool vs skip.
Click to expand...
Click to collapse
Found this thread, and tried the "turn off headset" fix. This worked.
starbuck123 said:
If I cannot figure out how to make it sound better, I might end up returning it. It's not worth the price I paid for it.
Click to expand...
Click to collapse
No need to return it - it sounds great now, and definitely comparable quality with other phones.
Just need to figure out why it's dropping out so much - something about me or my clothes is interfering...
Cheers
Pete
if you have put 58 in the bitpool settings that's the reason of the droppings. Lower the value to 48 it will work properly
I'm using HDTweak, which just has "Very High", "High", "Medium" etc.
I've put it on medium and it still happens.
I actually think it's my body and clothing blocking the signal, which leads me to believe the BT transmitter in the HD is really weak, or the receiver in the phones is really weak...
I've got my Bitpool set to 48. I can walk around the flat listening to music with the HD in the living room and the sound stays just as good. This is with several walls in the way.
I noticed a substantial improvement when I went from 30 to 48. The sound had been thin and dull before, although not so bad I couldn't stand it. Now it's much fuller and there's a lot more bass too.
I haven't set JointStereo to 0. With mp3 encoding this is actually quite a useful setting, it just means that it doesn't bother encoding the bass separately for each channel. As bass fequencies aren't directional, i.e. our ears can't tell where they came from, it's a handy way to save some bandwidth. I'm assuming that JointStereo means the same here. Having said that I haven't tried changing the setting to see if the sound improves still further.
I'm using the Jabra BT3030 btw.
Petee said:
Found this thread, and tried the "turn off headset" fix. This worked.
No need to return it - it sounds great now, and definitely comparable quality with other phones.
Just need to figure out why it's dropping out so much - something about me or my clothes is interfering...
Cheers
Pete
Click to expand...
Click to collapse
Please can you link this thread you're talking about?
THX
Good thread, I picked up an FM bluetooth transmitter for my car, sound quality is OK not FM quality for sure.
I was looking at my bitpool setting, it is set at 80 as well as the maxbitpool setting is 80 as well. Dropped it to 58 for both to try it out (will do so later).
Also changed jointstereo from 2 to 0. Frequency is at 48000, should I try 44100?
Also does anyone know how I can force a quick reconnect, when I go from ACC mode in my car to starting it up, it disconnects the bluetooth receiver from my phone then my phone starts playing music out of it's speaker...was wondering if there is a setting to reconnect within a second or two.
asci said:
Please can you link this thread you're talking about?
THX
Click to expand...
Click to collapse
http://forum.xda-developers.com/showthread.php?t=457331&highlight=bitpool
Cheers
Pete
Petee said:
http://forum.xda-developers.com/showthread.php?t=457331&highlight=bitpool
Cheers
Pete
Click to expand...
Click to collapse
I read that thread, it means that I should desable hands free option?
THX so much!
Hello, with my qtek 9000, from time to time I hear the music only half of the time (0,5s I hear, 0,5 not, and actually the uni adapt to this (the music is x2 longer)) with my ety8, and it doesn't come from thoses since I have no problem with them on another mobile and I get the same problem with other bluetooth headphones on my uni.
It doesn't come from being indoor/outdoor, near wifi or not because it's sometime doing this problem in my house and sometime not outdoor.
Soft reset does nothing, reset bluetooth on uni and my headphones once worked but it was certainlty pure chance because I tried many times then and it didn't do anything.
I hard reseted with another rom and the problem stayed the same.
Did anyone ever had this problem ? It's really wierd because when it's working, there is absolutely no problem so I can't really think that it would come from a damaged bluetooth transmitter...
try looking in Advanced Settings and change the bps transmitted etc. a fairly unnoticable lowering in quality of sound should improve the juddering.
well, reduced to 21 I still have a little pause each 5 seconds, reduced to 20 it's fine but the difference of quality is clearly noticeable.
my settings are:
Use Joint Stereo: Yes
Bitpool: 30
Max supported bitpool: 30
Min supported bitpool: 30
Sample rate: 48000 Hz
BtA2dpSnd Priority256: 0
Hope this helps
I don't have "BtA2dpSnd Priority256", though I don't think it would change anything, I'm gonna stay with this, that was a good hotfix thanks.
Wow, now, in only some days and for no reasons apparently, I must reduce it to 11.
Long time ago I let my uni just near to a wifi antena (from my freebox), actually touching it, bluetooth on but not using it at this time. Since my micro-weave detector make noise just around thoses antenas when I approach it, do you think it can have something to do with that ?