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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.
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Hmm! I was gonna start using my s9 wireless headphones. Now I'm skeered!
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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.
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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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Hi all,
I am using my gs2 with my Sony headunit (bt2600) in my car. It's great for calls but the quality while playing music is poor. It seems to always be slightly distorted and crackles at any volume combination on the phone and headunit. It has no quality problems using an auxiliary cable from the headphone port.
Has anyone else had this problem and know of a fix?
I'm using the standard unrooted XYKI4 rom but will happily change if another rom would solve it.
Thanks
This is the famous A2DP problem. No solution has been found until now and Samsung hasn't done anything either.
So you can use CM7 or MIUI where this problem has been fixed, or else wait for a stable ICS...
Ah ok, thanks for the reply. I'll need to decide whether to wait for Samsung or take the plunge and install a custom rom.
It's been fixed on the nexus. So there is a chance it shall be fine on ICS. I've battled this issue on my Sony headunit but cm7 and MIUI works a treat. Take the plunge but be careful.
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My girlfriend has a GS2 with a Pioneer headunit without any problems. I have my GS2 connected to my Toyota in-car satnav headunit and also there bt audio sounds fine without any distortion.
Btw I am on 2.3.6 (KI4) stock with Siyah 2.6.3 kernel.
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I just got a BT2800 and don't have any issues with the sound. It is better with the BT volume from the phone turned down a bit though.
I'm using checkrom v4
I tried ICS myself, and the problem has indeed been fixed. So that's some good news.
If I remember correctly, it was a problem in Gingerbread, Google fixed it later on but Samsung never bothered to apply that particular fix - at least up to the XWKK5 firmware.
A couple of relevant discussion topics here on XDA:
http://forum.xda-developers.com/showthread.php?t=1187488
http://forum.xda-developers.com/showthread.php?t=708685
I've searched for this problem, found some stuff that is close but I haven't been able to find it exactly.
Speakerphone and built-in microphone work fine.
But when I use my headset (Bose MIE2), the microphone fades in and out when I am on a call. People say it will sound fine and then start to sound "tinny" or like I'm "in a can". Seems like this happens when I stop talking and they speak and the background noise becomes louder to the caller. And it doesn't last. It fades in and out, several times on a call.
This headset worked fine on stock AT&T Gingerbread.
About two months ago, I decided to root my phone for the first time and install a modded ROM. So I flashed CM7. Headphone mic worked fine on CM7.
Bose microphone was also working fine on CM9 - one of the early release candidates.
At that point, flashing became easy so I started on the nightlies (I'm sounding like an addict, aren't I? I feel like one!!!).
Then I found my dream flasher/pusher, Task! I've been on AOKP ROM (currently up to date on the 5.1.2012 release) ever since. Awesome ROM, if you haven't tried it.
Still having the headphone mic issue though.
I've wiped fully several times (yes, I read every post in your thread, Task), trying to clear this up.
I also wondered if the headphones where jacked so I returned them to Bose and the new pair is presenting the same issue.
I have read all about the built-in mic swapping issues with the different kernels.
I've tried NEAK and Siyah and I'm careful to be sure I have the mic swapping versions for AOKP/CM. My phone does not like NEAK at all. Loves Siyah - getting fantastic battery life (14 hours today, 27% screen time and WiFi on all day with 20% battery remaining) and responsive. I'm currently on the latest Siyah ICS [v3.2rc1] with UC 200 to 1000, lulz/vr only. It is also awesome, thanks, Ktoonsez!
I'm wondering if that mic swapping on the phone has anything to do with the mic on the headset.
Also, is there anything else I can check to help troubleshoot this in more detail?
Finally, are there any controls for headphone mics or even microphone settings in ROM Control or anywhere else that can be adjusted?
Thanks for your help in advance!
The NEAK kernel only has one choice for Tasks rom, no need to pick between mic swap.
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brobinson2102 said:
.
I've tried NEAK and Siyah and I'm careful to be sure I have the mic swapping versions for AOKP/CM.
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Click to collapse
There's your problem. You have to use the AOSP version bro.
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Biporch said:
There's your problem. You have to use the AOSP version bro.
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Click to collapse
I'm wishing it was that simple. On NEAK, I've tried the AOSP - still have the issue. My phone freezes too often on that kernel.
On Siyah, I get the mic swap version for AOKP/CM - still having the issue.
The latest Siyah runs like a beast and gets fantastic battery, just has the fading issue.
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Can't replicate the problem... Sorry.
Biporch said:
Can't replicate the problem... Sorry.
Click to expand...
Click to collapse
Appreciate you trying!
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Hi .. I have an CDMA Evo 3D with the mic built inside broken/disfunctional. I have to use a headsets to talk on my phone till I get it fix.
Problem is I have BEATs earbud w/o mic that I use with sense rom but it works for talking. When I flash over to JB rom or Sense 4.0/4.1 . When making calls the person won't hear me even with the headsets on..
I'm aware that the headsets doesn't have a Mic but it worked on Sense roms , wondering why would it stop working on JB & and other Roms ?.
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How in the world do headphones without a microphone work as a microphone?!?
Some other witchcraft is going on here. Maybe the headphones being plugged in causes the broken microphone to work?
This certainly is strange. How can earphones w/o mic enable you to use a mic that is busted
All beats earphones have built in mic AFAIK. In that case its probably because the sense roms have beats support and the others dont
Sent from my Evo 3D GSM
Makes sense Eminem. So maybe the headphones have a hidden built in microphone that the op didn't see. That does seem to be the only plausible explanation. Or Halloween witchcraft.
i just checked beatsbydre site and all 4 earphones have built-in mic
EM|NEM said:
i just checked beatsbydre site and all 4 earphones have built-in mic
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I see thanks for finding that out for me . But the question is why wouldn't it work on ASOP roms or JB roms? It does work for me on
http://forum.xda-developers.com/showthread.php?t=1640134 which does support beats audio...So I'm guessing what was stated is true, It works for me because the Rom has beats supported, and the others don't now that I think of it.
You could try to install something like Beats Installer from the store or Awesome Beats from this site. They bring Beats to AOSP ROMs (or something like Beats).
Thanks so much for the advice!! I downloaded the installer on Play Store and now it works well with MIUI JB ROM
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Glad it worked! Also thanks for posting that it worked so someone who searches can try your solution if they have a similar problem.
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?
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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
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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.
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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+...
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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
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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
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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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Click to collapse
ditto. it worth a few bucks IMO.