[Q] Bluetooth Bitpool Setting - Compiled into the kernel? - Vibrant Q&A, Help & Troubleshooting

So I'm surprised that Cyanogen is the only ROM to date that actually addresses the A2DP audio quality problem with the Vibrant. By default the stock kernels lock in the bitpool setting at 32 when it can be set as high as 54. As a result the 'highs' sound distorted and tinny as if I'm listening to music streaming through RealPlayer circa 1997. Why more people aren't complaining about this is a mystery but there are a lot of people that aren't happy.
To the developers, is this bitpool setting in Bluez something thats rolled into the kernel when compiling or is it something that can be easily changed? Possibly a configuration file? I've googled this issue to death over the last three months hoping for a solution to pop up, I've read up on Bluez but the documentation is poor. Does anyone have more information or can point me in the right direction to solving this myself? Having to wire up my phone every morning for music is driving me nuts.
Any help would be greatly appreciated!

I couldn't agree more man. I am going nuts over the horrible quality. I think it hasn't been addressed as much because not as many people have bluetooth stereo headphones or bluetooth adapters in their cars. Cross your fingers.
Sent from my SGH-T959 using XDA App

Hmm! I was gonna start using my s9 wireless headphones. Now I'm skeered!
Sent from my GT-I9000 using XDA App

Seriously, no one knows anything about the bluetooth stack?

I can't believe that no one has said anything about this being fixed. There has to be a way of manually going into the root directory and adjusting the bitpool information that you're referring to. The tinniness is killing me man!

Weird, but I don't have any sound quality issues over BT.

Couldn't agree more OP. BT is seriously jacked on these. It works, but not like it should quality wise.

Ya, the BT streaming audio doesnt sound nearly as good as wired. Hopefully someone more knowledgeable regarding the subject could chime in, I know Supercurio did a lot of reverse engineering for sound quality, but I dont know if he worked on A2DP

Devs moved it from Development to Q&A... not sure I agree with that as I don't think this is a setting as much as its a fundamental portion of the kernel and needs to be rolled into a released ROM.
edit:
I just noticed theses guys seem really close....
http://forum.xda-developers.com/showthread.php?t=708685&page=3

Still no one cares? Can anyone help!
There's a whole slew of complaints here:
http://code.google.com/p/android/issues/detail?id=9888

Bump...
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Bunp...Bump...
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Just got my new bt streaming head unit for Xmas and couldn't be more disappointed. I'm having the exact same issue and am also frustrated at the lack of interest in the problem.
I'm not a Dev BY any means, but I can sometimes hack and slash my way through stuff like code. If cm fixed it,and his source is available, I don't understand why more kernel devs aren't including it in their kernels. Do you think if someone like netarchy asked cyanogen what he did for that, the cyanogen guys would share?
I want to do something to fix this for all android devices, but I don't know where to start other than start pming devs and hope they listen.

I'm baffled at how few people notice or care that the bluetooth audio is rubbish on essentially most new android handsets. They're multimedia hubs and can do most everything, and yet the audio doesn't work properly. I'm really discouraged at this point. I've had this handicapped phone for 6 months now hoping someone would fix this eventually but apparently I was naive. I'm tempted to recommission my 2.5 year old G1 to take care of audio duty in my car since modern Android builds aren't up to the task.

I'm gonna be looking into it for my next kernel =] I didnt know this was an issue because I really dont use BT......are you guys wanting to use BT for music? is that what this is? Cause honestly music stream over BT is like rubbing you D with sand paper and saying it feels good (IMHO). BT audio compression reduces the audio quality to much for my taste, but I'll fix it anyways =P

Hey ECOTOX, does the BT audio control function reside in the kernel? Or the ROM? My fwd/back buttons aren't working on my headset.
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FReQ Z said:
Hey ECOTOX, does the BT audio control function reside in the kernel? Or the ROM? My fwd/back buttons aren't working on my headset.
Sent from my SGH-T959 using XDA Premium App
Click to expand...
Click to collapse
thats a headset thing, the phone shouldnt control that

Worked with Bionix and Simply Galaxy. Doesn't work with Simply Honey or Project V. Hmmm... I'll do some troubleshooting.
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worked in froyo and not gb then?
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Related

[PRJ] Improve Bluetooth in Car

I found out that certain combinations of ROMS and Kernels work better with my CAR Bluetooth then other combinations. For instance CM6 is not working perfect and is uncertain to reconnect to my Car system. On the other hand most Sense ROMS work better with my Car system.
So in this project I wanna track down first which components have influence on the bluetooth stack, and more important which specific parts of the kernel, software and other things are related.
This to improve the BT Car system of at least my Scenic but I have the feeling more Car systems have issues.
Please if you have info about this put it in this treath so we can make it better.
Nice initiative. My BT system in my car works flawlessly with WinMo, but as soon as I connect my nexus, my speakers begin shrieking like all hell breaks loose. Also, My Nexus the seems to lock up and I need to pull the battery for all misery to end.
LOL.
That was the first time I connected the bugger, so I wasprobably still running Eclair when I tried it.
6.1.1 works well for me, both bluetooth calling and a2dp.
Theres a little fuzziness going on when nothing is playing, like white noise, but that's pretty much my only problem. No wait, there is one more thing actually, every now and then while music is playing it'll skip more or less a second
Just to add... I have to repair and disable/enable by every time I get in the car or the sound will drop out every 15-30s on any rom that uses froyo. GB seems to help where I only need to disable / enable bt. Kenwood x-993 with parrot bt. Using latest bt firmware.
Sent from my Nexus One using XDA App
PhantomRampage said:
Theres a little fuzziness going on when nothing is playing, like white noise, but that's pretty much my only problem. No wait, there is one more thing actually, every now and then while music is playing it'll skip more or less a second
Click to expand...
Click to collapse
This happens to me too once every three or four songs, but it's such a small thing it doesn't bother me much. On the other hand, for the short while I was using MIUI, I felt it was happening much less, but I may have been imagining that
Heres my setup, and it works flawlessly every time i start the car.
Car Deck: JVC KD-R900 (Using the small bluetooth adapter that came with the unit mounted in the back USB port)
ROM: Enomthers TheOfficial Nexus1 v2.14.3
Kernel: 2.6.32.35-TheOfficial-AudioMOD-720p
Radio: 32.41.00.32U_5.08.00.04
OS Version: 2.2.1
Like i said earlier i have no problems with the audio quality or connecting to my unit. As soon as i turn my Bluetooth on it connects within about a minute.
Calling quality is good, audio quality is good and AVRCP works also (play/pause/next/prev)
If you need anymore info just let me know.
Its good to see there is some reaction on the start of this.....
My goal is to achieve and to find out which components are involved in the Bluetooth experience:
F.I. :
* Kernel modules and libs
* Application in the rom to actually making the connection
* Bluez configuration and settings
I have done some searching but found that even with the same Bluez settings there can be a difference between some roms in combination with kernel.
jscat1 said:
Just to add... I have to repair and disable/enable by every time I get in the car or the sound will drop out every 15-30s on any rom that uses froyo. GB seems to help where I only need to disable / enable bt. Kenwood x-993 with parrot bt. Using latest bt firmware.
Sent from my Nexus One using XDA App
Click to expand...
Click to collapse
I have the same issue on my Kenwood system.
jscat1 said:
Just to add... I have to repair and disable/enable by every time I get in the car or the sound will drop out every 15-30s on any rom that uses froyo. GB seems to help where I only need to disable / enable bt. Kenwood x-993 with parrot bt. Using latest bt firmware.
Sent from my Nexus One using XDA App
Click to expand...
Click to collapse
Me too, same model. I've updated the firmware on the X993 and it seemed to help.
elfblackdeath said:
I have the same issue on my Kenwood system.
Click to expand...
Click to collapse
Same here on my DDX-812. Almost everything "works", I just get the drop-out when streaming music if it's not a fresh pairing.
The bluez stack was updated with Gingerbread...I'm hoping against hope that that fixes some things.
i have to use a no-audio-boost kernel with my jabra headset, otherwise the call quality is abysmal. lots of metallic clicking and other strange effects going on.
but i have seen no differences in the overall connection stability otherwise.
hmm i have a problem with my car dock and bluetooth i think. when using the navigation the voice plays via the phones speaker not the dock speaker. is this similar to the problem in the 1st post? if so, would love a fix!
I'm on CyanogenMod Nightlies with the included Kernel and have a Kenwood DDX8024BT with built in bluetooth. It connects up perfectly when I turn the ignition on and seems fine when in call. I don't use the A2DP much but when I have I've not had any problems.
Slightly OT, the only problem I have is with reading contacts from the phone. I have two phones paired. I usually have the Nexus connected but occasionally switch to my work phone (a Tocco Lite). At some point it took the contacts from my work phone and then wouldn't redownload the Nexus contacts when it was reconnected. It's now done it at some point but there's a handful of contacts that still won't transfer no matter what I try.
On a side note, I have a Clarion CZ500 rig in my car, and the N1 is incompatible with the microphone boost firmwares they offer on their site. All I hear is crackling when I try to make or receive a call.
What's odd is that the HTC Desire works fine with those firmware. Even Blackberry Pearl.
I ordered the N1 dock on eBay. I guess I'll see if the dock can handle the firmware.
i have a n1 and im still running cm 5.0.8 with android 2.1
my phone pairs with my car without any problems and i am able to talk to people and whatnot. Now as far as music, i use a blackberry music gateway bluetooth device that i plug into my car's 3.5mm jack and then i pair that device with my phones bluetooth. It pretty much connects automatically all the time and sound quality is awsome however as someone mentioned earlier in this thread, i get the occasional 1 second skip every so often. Does anyone have any idea whats causing this and how can i fix it? It is extremely annoying!!! I paired the blackberry gateway device with my gf's mytouch and there was no such problem, which leads me to believe that the problem is in my n1 :/
My $02: I cannot use a2dp and hands free at the same time. If both are connected the the a2dp drops out all the time.
This is not an issue with my HD7.
A workaround would be awesome.
Sent from my Nexus One using XDA App
I suspect the main difference, hardware combinations aside, between Stock/CM and Sense roms is that they use different bluetooth stacks.
Differences in the bluetooth stack that have caused issue for the FM radio on stock roms, an issues for bluetooth file transfer on Sense roms as far as I know.
Like iphone fanboys would say: fragmentation
On a related note the behavior of my N1 with the Parrot handsfree has vastly improved in GB.
i have the kensington liquidaux bt adapter in the car and cm7 rc4 with stock kernel skipped constantly. rc2 was better, but still unbearable.
i am currently on intersectraven's 4/3/2011 kernel and from limited use, has not skipped on me yet.
have people tried bt music streaming with other kernels with cm7 rc4? wildmonk? pershoot? etc.. thanks.
Try CM7 Issue 3233 fix
d1mitrov said:
It pretty much connects automatically all the time and sound quality is awsome however as someone mentioned earlier in this thread, i get the occasional 1 second skip every so often. Does anyone have any idea whats causing this and how can i fix it? It is extremely annoying!!!
Click to expand...
Click to collapse
Can you try the fix in Issue #3233 on the CM7 bug tracker? http://code.google.com/p/cyanogenmo...on Model Network Owner Summary Stars Priority
scotte9999 said:
Can you try the fix in Issue #3233 on the CM7 bug tracker? http://code.google.com/p/cyanogenmo...on Model Network Owner Summary Stars Priority
Click to expand...
Click to collapse
i think thats exactly what my problem is, when the phone is connected to the car and the music gateway is connected as well i get the intermittent connection and it skips every so often but if i disconnect the phone part then the music never skips...however im not on CM7 so i dont know if that fix applies to me and i dont know how to begin changing those settings

Bluetooth and Thunderbolt

I know there is alot of issues with bluetooth for the TB. I was able to have full A2DP streaming with my DINC in my car but the TB and EVO wont even connect at all. I have a Sony XPLOD MEX-BT3800U. I was just wondering whats going on with the hardware compatibility and if there are any possible ways to create compatibility. What exactly is not compatible? Is it the ROM, KERNAL or RADIO? Hardware or software profiles? If someone could answer how it all works from a development / engineering standpoint that would really ease my mind. Just curious if I should throw down another few hundred on a new radio for my car or if I should just wait for software fixes.
Thanks
loccoelf said:
I know there is alot of issues with bluetooth for the TB. I was able to have full A2DP streaming with my DINC in my car but the TB and EVO wont even connect at all. I have a Sony XPLOD MEX-BT3800U. I was just wondering whats going on with the hardware compatibility and if there are any possible ways to create compatibility. What exactly is not compatible? Is it the ROM, KERNAL or RADIO? Hardware or software profiles? If someone could answer how it all works from a development / engineering standpoint that would really ease my mind. Just curious if I should throw down another few hundred on a new radio for my car or if I should just wait for software fixes.
Thanks
Click to expand...
Click to collapse
Personally , I would wait for a software fix. But sometimes that might not help also. But I have some issue sometime when streaming to my radio bluetooth with a little disorder sound sometimes. Very lite.
loccoelf said:
I know there is alot of issues with bluetooth for the TB. I was able to have full A2DP streaming with my DINC in my car but the TB and EVO wont even connect at all. I have a Sony XPLOD MEX-BT3800U. I was just wondering whats going on with the hardware compatibility and if there are any possible ways to create compatibility. What exactly is not compatible? Is it the ROM, KERNAL or RADIO? Hardware or software profiles? If someone could answer how it all works from a development / engineering standpoint that would really ease my mind. Just curious if I should throw down another few hundred on a new radio for my car or if I should just wait for software fixes.
Thanks
Click to expand...
Click to collapse
I have the exact same stereo... no.problems with bamf 1.6.1 or cm7 test 4
Maybe its your stereo
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loccoelf said:
I know there is alot of issues with bluetooth for the TB. I was able to have full A2DP streaming with my DINC in my car but the TB and EVO wont even connect at all. I have a Sony XPLOD MEX-BT3800U. I was just wondering whats going on with the hardware compatibility and if there are any possible ways to create compatibility. What exactly is not compatible? Is it the ROM, KERNAL or RADIO? Hardware or software profiles? If someone could answer how it all works from a development / engineering standpoint that would really ease my mind. Just curious if I should throw down another few hundred on a new radio for my car or if I should just wait for software fixes.
Thanks
Click to expand...
Click to collapse
I had a similar problem with my factory radio on my Ford Fusion. I resolved my problem by updating firmware on the factory radio (MS Sync) and running the leaked radio update for TB and a stable Rom like Perfect Storm 1.4 and 1.11 batsaver kernel. My issues were resolved, I was having problems with pairing, when it would pair I would lose connection within 1 to 2 min and could not regain. Very fustrating. I attribute most of my issues with OC of TB I was too aggressive running what I thought stable at 1.5 Ghz.
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I had some similar issues with my stock TB loosing bluetooth connectivity with my car. I would get in the car, it would connect, then a minute later disconnect. Turns out, I was able to fix it by unpairing, then reparing; and denying permission for the car to download the phonebook from my phone. Something in my contact list was causing the issue.
Weird about the phonebook
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I have the Sony MEXBT2700 and it worked great with the tb at first, but then it, the tb, started acting up whenever I would turn the car off. This was one week after launch day for the tb. It would literally cut all sound off on the phone till I restarted, so I ended up calling verizon, then sent me a new phone about two weeks after launch day.
Since then it has been working perfect, sq isnt great, but its better than doing bluetooth from my Macbook pro.
If you've got a Ford with Synch
Just in case you've got a Ford vehicle with Synch, there is seemingly random problem that sounds like this and I posted some info over at Ford Syncmyride site. In a nut shell, simply pull the fuze for the system wait about a minute and then replace. If you're like me and you couldn't find the correct circuit disconnect battery cable.
Seems the system needs to do a "battery pull". Only have experience with the Ford Sync but that's my .02 and I hope it helps.
I have sync in my '08 focus and i've never had issues with any of my phones streaming music or placing/receiving calls.
TheDanimal said:
I have sync in my '08 focus and i've never had issues with any of my phones streaming music or placing/receiving calls.
Click to expand...
Click to collapse
Me neither, I have a 2010 F-150 and I have had no issues with Sync.
Sent from my ADR6400L using Tapatalk
Bluetooth with my TB to my JVC headunit has been rather problematic for me. What I did finally discover was that if I didn't allow for phonebook syncing, all is well. I am currently on Das BAMF 1.6.1 and now have perfect streaming of music and calls as long as I deny that silly phonebook.
Hope that helps.

Can't hear calls through car speakers.

I've been having this issue for a while. It seems that no rom beyond 2.2 can route calls through the car speakers correctly. I've finally gotten tired of waiting and ordered an auxiliary plug with a mic from amazon so I can move on to new roms, but now the rom I'm using (simply honey, the 2.2.1 version) won't even let me hear the other person talk.
Does anyone know a workaround to get the calls to route correctly through the speakers? I don't understand why any music app I have doesn't have this problem, only voice calls.
Many thanks for any help.
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Is your issue something like this?
http://forum.xda-developers.com/showthread.php?t=842059
Or is it with bluetooth? I know I have a Jabra Cruiser and i can hear music and calls just fine through my car speakers. Of course thats with bluetooth. Good luck!
The wired headset never worked properly in 2.2.1. It has to do with the mapping of the contacts on the plug itself. Most of our 2.2.1 ports are sourced from the European i9000 build, which while it is a Galaxy S phone, is different enough that some things dont work, like your wired headset. We never did find a fix for it when I was playing with 2.2.1, accept to use a bluetooth device instead of a wired headset.
On a side note, in my humble experience, KB5 based 2.2 works much better on our Vibrants than any 2.2.1 build ever did, and the headset works.
Sent from my ZenDroid, meditating on the XDA App
Thanks for the replies, I managed to get it fixed!
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[Q] Little Annoying HOX+ Issues

OK so I've had my HOX+ for about a month having moved on from the Apple empire and for the most part I love the phone. There are a few annoying things I've noticed and after much time searching forums, contacting HTC and all that jazz haven't found a good answer yet. So I figured I'd just try asking and getting some opinions here. My disclaimer is that I'm still 100% stock and not quite ready to dive into root and custom ROMs yet
Issue #1 - that damn BT call audio issue - Has anyone found a fix for the BT issue so everyone I talk to in my car doesn't sound like they are talking with their phone in their mouth? I spent a week working with HTC on this and all I ever got was the standard "we're sorry to hear about your issue, working to resolve, blah blah blah"
Issue #2 - I've recently noticed a issue with audio pausing and the phone being slow to respond from unlock when playing music. PowerAmp seems to be the worst culprit but I've noticed this a little with Double Twist also. I've tweaked my audio settings in PA to use the "huge" buffer and highest thread priority. Turning Beats off didn't seem to help either.
Any feedback welcome, thanks.
Gonna have to root to fix Bluetooth audio issues or wait for a ota threw your service provider
Sent from my HTC One X+ using XDA Premium HD app
Dive into the root bro
Sent from my HTC One X+ using Tapatalk 2
Kinda figured root was the common answer on the BT issue, any thoughts on my spastic audio?
dmcwhirter72 said:
Kinda figured root was the common answer on the BT issue, any thoughts on my spastic audio?
Click to expand...
Click to collapse
I can't call that one because iv never had that problem and I'm running power amp too
Sent from my HTC One X+ using Tapatalk 2
For the audio issue i also do have that problem.. little minor pauses.. but quite annoying.. tried different music players but there was no difference.. I also have a bigger problem actually.. the headphones output are not equal.. one is higher than the other.. tried different headphones.. but na.. nothing has changed..
Sira. said:
For the audio issue i also do have that problem.. little minor pauses.. but quite annoying.. tried different music players but there was no difference.. I also have a bigger problem actually.. the headphones output are not equal.. one is higher than the other.. tried different headphones.. but na.. nothing has changed..
Click to expand...
Click to collapse
Yeah that sounds almost exactly like my problem, little minor pauses most of the time (which to me is kind of annoying) and every so often a longer pause of like 4-10 seconds. I ended up having my phone go into a sleep of death last night so I rebooted and also ended up removing the Double Twist widget I had up when I was checking out different players. Today the pause issue seemed better but still not 100% so I'm starting to suspect something (widget or otherwise) I'm running is maxing out the CPU or something.
Haven't noticed any balance issue though, what player are you using? I know in PowerAmp and I'd imagine others there is a balance control...could just be off a bit or if nothing else you might try adjusting it to compensate till you find a solution.
Stock based and aosp roms have Bluetooth fixes.
You can't fix anything yourself unless u root, otherwise wait for a carrier update that may never come.
Will also fix any slow performance issues you might be having, even more so with a custom kernel.
Never experienced issues with Bluetooth myself tho.
Sent from my HTC One X+ using xda premium
So as an update, rooted yesterday and installed ViperXL. BT fixed, just got around to getting all my music back on today so I havent tested playback yet.
Sent from my HTC EVARE_UL using xda app-developers app
I am having the same audio issue. I'm using N7 player. It sucks. I thought it was just the player but then It started happening on pandora too. does this quick pause only happen on AUX? I haven't tested to see what happens with bluetooth audio streaming. Only happens/has been tested happening with AUX.
This happens on the latest viper rom for one x+ att
We should fix this!
use Zplayer
Sira. said:
For the audio issue i also do have that problem.. little minor pauses.. but quite annoying.. tried different music players but there was no difference.. I also have a bigger problem actually.. the headphones output are not equal.. one is higher than the other.. tried different headphones.. but na.. nothing has changed..
Click to expand...
Click to collapse
I have had same problems with music, tried Zplayer which solved the issues... my phone is on stock rom ...
Had a chance to do some heads down work and played music for the better part of 4 hours. The pause issue is still there with Double Twist, but nowhere near as bad when I was running stock. Very minor now bit still apparent. My PowerAmp trial ran out so I can't test it. Might try Player Pro even though I'm not crazy about it.
Sent from my HTC EVARE_UL using xda app-developers app
I have noticed minor pauses in music at the same spot when walking down my road towards my house. Due to it happening in roughly the same spot, I have put this down to my home WiFi connecting and/or my Vodafone Sure Signal signal booster being picked up as the primary network connection for calls etc.
I have no idea if my thoughts are correct, but is this something anyone else has tried or even thought about? My phone is currently fubar'd so I can't test it atm.
I hv tried few ROMs and concluded that its the stock kernel's processor settings on sleep mode, I installed cm 10.1 with blade kernel and changed minimum CPU frequency at bit higher level and music plays perfectly fine... I hope this could help others.
Sent from my HTC One X+ using xda app-developers app
ROM: CM 10.1 unofficial
Kernel: Blade 3.1.10
adamtheluck said:
I have noticed minor pauses in music at the same spot when walking down my road towards my house. Due to it happening in roughly the same spot, I have put this down to my home WiFi connecting and/or my Vodafone Sure Signal signal booster being picked up as the primary network connection for calls etc.
I have no idea if my thoughts are correct, but is this something anyone else has tried or even thought about? My phone is currently fubar'd so I can't test it atm.
Click to expand...
Click to collapse
Yes, I have found that the audio pause issue seems to be related to connecting to a wifi spot. It still happens when wifi is turned off though, so although they are related, it's not the cause.
I definitely think it has to do with the clockspeed of the device when it is idling.
I notice the audio pauses when,
The screen is left on and the orientation changes
pause frequency changes depending on the player
When connecting to a wifi access point/scanning for one
Someone take this information and e-mail HTC. I was going to call them, but I don't have the time to deal with all of this stuff right now. College finals are next week.
EDIT: managed to give HTC a call. They suggested poweramp and said that they were working on a proper fix. I don't have the time to test to see if power amp solves the issue just now, but it's always good to hear other people's experiences/devices specs. So let me know your device specs and what you know about this issue!

Bluetooth media sound

Frankly it's poor, call is fine, but the media I get distortion and crackling, I've heard others talk about it, but no one had mentioned a fix. Is anyone aware of a resolution, it's quite aggravating. There was a file I could edit on my captivate back in the day that upped the transmission rate that took care of it. Is there something similar that could be done here?
Sent from my HTC One X+ using xda premium
That's Interesting. I don't have any problems with the bluetooth audio streaming quality. Sure, nothing beats an aux cable quality wise, but it's always sounded pretty good to my ears. I consider myself a little bit of an audiophile too.
I notice it mostly in my car, but I also bought backbeat go ear buds today, and it really just didn't sound right, it's not in your face like holy cow why does his voice sound like that, it's more like crackling in the highs, I don't get it through aux though, I would have thought it was my phone, but I had seen it mentioned a couple other places
Sent from my HTC One X+ using xda premium
alpine type-r interiors and sub, alpine bt head unit, everything is powered by alpine v-power amps, and I gotta say, I hear the distortion pretty clearly over bt. My old inspsire 4G running cm7 sounded AMAZING over bt. I hope someone finds away to bump up the clarity some. devs? Lol
So I think it's safe to say, you like alpine ha ha, but seriously though, thanks for the +1, didn't want people to think I was just crazy or something.
Sent from my HTC One X+ using xda premium
You guys have tried this fix as stated in the General HOX+ Q&A?
Or it is a different issue?
IIRC that was the first mod I flashed for this phone, and while it helped 10 fold with the call quality, it did little to nothing for media and other audio.
i got the answer you're looking for...
i noticed this problem the first time i used my hox+ with my car stereo. same problem...bt calls are ok, but if you are listen to music, you hear ugly distortion in the highs...the sound isn't clear and the stereo image is bad.
after doing some research i found out that it has to do with the bluetooth bitpool settings. but what can you do against it: maxween did a bluetooth fix for me, which worked perfectly. it is implemented in the newest builds of his AOKP roms, and in the newest versions of Liors cm 10.1 roms.
so you can use this fix in every aosp rom.
unfortunently, there isn't a fix for stock-, and sense rom's jet. i've made a demand to mike1986 if he can implent it in his android revolution hd 6.5 rom, but it's not done atm.
so if you want to listen to some fine bt music quality (it sounds awesome in my stereo now btw.), you have to install the actual aokp or cm 10.1 rom...otherwise you have to wait for a sense fix.
ps: we've connected the brandnew htc on from my friend in my car stereo. same issue! looks like htc is doing this intentionally to sell more of the aptx care stereo adapters and beats accessoiries with the aptx codec...
I also have this problem. It annoys the hell out of me because I can ALWAYS hear it. Maybe i'm too sensitive. I don't know. Either way, I'm going to see if the Elegancia ROM can get the fix implemented.
Thanks for letting us know there is a fix.
The only way i have found to lessen the distortion is turn the media volume on the phone down to at least 3/4 and use the vehicle/Home stereo receiver to control the volume increase needed. It helps a lot, but a true fix is really needed
Indeed, and check to see if your receiver or head unit has a secondary volume control for each input. My alpine for instance, allows me to tweak the volumes for each specific input (AUX, HD radio, Bluethooth, CD) from a rang of -5db to +5. IF i set it anything above 0 it sounds like crap. Hope this helps some.
if the connection's fine, you should not have to turn down the volume. the sound quality is even better when the bt output vol is on max on your phone. on the other devices, i would recommend an input of 0db, if you are going above it, you have the risk of digital distortion, and this is sounding really ugly.
i'll post a link from maxween later so if any developer of a sense custom rom could do a fix would it be awesome
http://code.google.com/p/android/issues/detail?id=39632#c151
here is a thread about this issue, i also found a german page from a guy which used this fix for his htc one and it worked.
http://forum.xda-developers.com/showthread.php?t=1880298http://
i tried it out on my one x+ but unforunently it didn't work...so if some developer could make this "audio.a2dp.default.so" fix working on the hox+ (sense rom's) it would be awesome...
Thanks for all your research and time mr_breaks. I am hoping we can get a fix for this issue.
Using an aux audio cable is not a big deal but listening through BT is so much easier and allows me to control my music from my car controls. I like that functionality.
same here. i don't like to plug in the cable everytime and the control over my car is much confortable and safer.
btw: with the patch the bt sound is better than with cable
imo... of course it depends on the car unit, but i had very good results with my system and my hox+...
Sent from my HTC One X+ using xda app-developers app
So did you fix it or not? I thought you said you tried fixing the bitrate settings but it didn't work.
If I can change the settings myself, i'd like to try it if you could guide me.
not yet. there is no way to change the bitpool manually, it has to be done in the file called "audio.a2dp.default.so".
i'm waiting for support form the developers, cause i don't have the know-how to do a fix by myself. ..."i would, if i could"
mr_breaks said:
not yet. there is no way to change the bitpool manually, it has to be done in the file called "audio.a2dp.default.so".
i'm waiting for support form the developers, cause i don't have the know-how to do a fix by myself. ..."i would, if i could"
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well as you know we don't have source for the exact version sense is using
if a version compiled from 4.1.2 is working must be tested
I can provide a version later
Sent from my HTC One X+ using xda app-developers app
maxwen said:
well as you know we don't have source for the exact version sense is using
if a version compiled from 4.1.2 is working must be tested
I can provide a version later
Sent from my HTC One X+ using xda app-developers app
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Click to collapse
man, you are the man! if you can find a fix, i deffo gonna hit the donate button
mr_breaks said:
man, you are the man! if you can find a fix, i deffo gonna hit the donate button
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ditto. it worth a few bucks IMO.

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