HTC EVO 4G :: Bluetooth A2DP Sound Quality Errors
Jul 18, 2010
So far I love my EVO, but one thing that is really driving me crazy. With my Blackberry I had grown accustomed to streaming my music from my phone to a bluetooth stereo gateway in my car and my home.My BB sounded GREAT doing this.But the EVO has a really grungy crackling sound, especially when there is loud high frequency content, such as a lot of cymbals, etc. Some songs sound better than others depending on how they were recorded, but by in large it's very annoying.Even my wife, who is nowhere nearly as picky as I am about sound quality complains about it.I've tried to put up with it, but usually I resort to plugging directly into the aux jack.What a letdown for such an otherwise advanced phone!Is anyone else experiencing this?The research I've done so far indicates the the problem is that Android is locked at a relatively low "bitpool" setting, which is ok for voice, but doesn't provide the necessary bandwidth for decent music quality.Thus far I haven't found way to adjust this.Does anyone know of a solution, or if there is a solution coming? Will this be addressed in Froyo?It just sucks to have to plug my phone in again just to get decent sound quality.
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Jun 14, 2010
Anyone having issues of their bluetooth a2dp headphones dropping connections sporadically?I heard somewhere that WIFI might be the issue.
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Jun 1, 2010
It looks like A2DP Stereo Bluetooth support is a recent addition.
Would you folks that know about it expect this to work in the Evo?
I've tried pairing with my Jabra BT620s headphones, with no luck. One time I got the remote control to pause & un-pause the song, but I've never gotten the audio redirected, nor the volume control to work.
Shoud this be in 2.1? Froyo?
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Dec 23, 2009
My 'droid will not connect to my Garmin 785T with the A2DP profile, sound for phone speaker phone works fine tho. Garmin won't do anything, I've already talked to them, are there any adjustments or setting on the droid that I can try to make this work, I'd really like to get Pandora or other audio going thru it.
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Oct 8, 2010
I am completely new to bluetooth app development. what exactly is a bluetooth profile? is it a hardware specification for the device? can an android mobile phone with bluetooth act as sender and receiver in A2DP profile?
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Apr 28, 2010
Does anyone know if the DI has/uses the A2DP Bluetooth profile? I'm looking for a good Bluetooth stereo earbud set and most say they use A2DP. I checked all the literature on the DI that I could find and don't see A2DP listed anywhere. I searched the forums and found some info regarding the Hero and Motorola Droid, but nothing on the DI. I did read where the Hero with Sense UI had some issues with 3rd party apps and A2DP, but that the native Sense UI music app worked fine. Can someone enlighten me on A2DP and the DI please?
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Jan 15, 2013
I've tried about a dozen "mono" apps and have found nothing that will do what I want. I have also tried the Droid Incredible and my current phone the GS3. I have a 2011 BMW and for some reason they didn't include a2dp in their stereo system. Nothing I do will force the stereo to play music or notifications, or read out lout texts through the car speakers. The only thing that will go through is phone calls.
I've accidentally discovered something interesting. If I am on a call through Bluetooth in the car and navigating at the same time, the navigation voice will come through the cars speakers as well.So what I need is something to trick the car into thinking my phone is on a call, thus triggering the Bluetooth to transmit phone sounds through the speakers, this way I can use a text message reader, music, whatever.
So the app/hack would need to emulate whatever the phone does with Bluetooth signals when it starts a call. All sounds the phone makes should go to Bluetooth.....which it seems like its already doing while on a call.
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Jan 26, 2010
I have a Bluetooth recevier connected to the head unit in my car. It's paired with my Droid and connects just fine manually, but it won't autoconnect when it sees the unit. My BT headset autoconnects, so I'm not really sure what's different.
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Feb 25, 2010
I would like to develop a software using Bluetooth A2DP/AVRCP profiles on Android. I could not find the related API on the developer's website at this moment. But, I found a product by Sybase below. http://www.sybase.com/detail?id=1064424 Do we have any other option?
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Nov 12, 2010
Anyone know how I can detect when the Bluetooth audio is disconnected?I want to be able to pause the currently playing audio when it's disconnected,similar to how I do for the ACTION_HEADSET_PLUG intent,but can't figure out how to do it for a Bluetooth device.Any ideas?
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Apr 4, 2010
Is there any way that I can disable the A2DP Bluetooth profile on my Hero please? I do not want it to be used for one particular connection, my Bury car kit, but do not mind if it is off all the time. I used to be able to do this in WM with a little app called BTMusic - does anybody know of an equivalent in Android please? I have searched the market without success.
I know I can long press on the connection and tell it not to stream media, which switches off A2DP, but I can't make that stick. Next time they pair it is back on again and I then have to go in and manually switch it off again. A pain when all I want to do is get my sat nav speaking to me when I sit in the car!
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Jun 12, 2013
I have a bluetooth audio A2DP streamer (a BTT005) which I am using to send bluetooth audio from my telly to something.
The original idea was to transmit this to my mobile phone (samsung galaxy S3), and use the normal headphones on the phone to listen to the telly quietly while I'm working late at night.
For some reason, I can't see any way to pair the a2dp transmitter with the galaxy s3.
There seems to be plenty about sending an audio stream out FROM the S3 to a receiver, but no info about configuring the phone to receive an audio stream IN to it.
(Obviously the other answer is to buy a bluetooth headset to receive the audio stream, but I thought it would be cool to use my phone as the headphones).
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Sep 11, 2010
I know its possible to send audio from an Android phone via bluetooth to a PC using the a2dp profile. But I want to do it the other way. Connect the phone to my amplifier and send audio via bluetooth a2dp from my laptop.
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Aug 13, 2010
In my understand, Anroid app supports only SPP connection not HFP and A2DP. However, I want to initiate HFP and A2DP connection in Android app just like selecting Bluetooth device in Bluetooth Settings menu. I'm not sure it is possible to use a intent including BluetothDevice object, so the intent receiver can initiate HFP and A2DP connection. If you have a idea, could you let me know that?
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Oct 23, 2009
I didn't find an API to detect if a Bluetooth A2DP is connected. Can somebody point me out how to check? It looks like if I route audio to Bluetooth A2DP without check, the sound will be routed anyway, and the speaker is turned off.
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Jan 9, 2010
I have been experiencing some frustrating audio stuttering or skipping while using A2DP Bluetooth stereo. After a lot of web searching and experimentation, I seem to have found a solution and thought I would pass it along just in case it may be of help to others.First, the problem. I am using a Sprint Samsung Moment Android v 1.5 phone and an Altec-Lansing/Plantronics Backbeat 903 bluetooth stereo headset. This combination has generally been working great so long as I am indoors or in my car. Oddly, though, as soon as I start moving around, especially outdoors -- and especially in a downtown area -- I would begin to get persistent drop outs, stuttering, skipping, etc.Research on a number of websites suggested two potential general sources for problem:
1. A2DP uses most or all of the bluetooth bandwidth and a fair amount of processor; this can create a problem of insufficient bandwidth and/or system resources. A number of sites and posts suggest various approaches based on this notion, most of which involve turning off or shutting down as many resources as possible including wifi, gps, unnecessary applications, or even restarting the phone to clear out such processes. I already do most of this just to try to keep my battery alive through the entire day. But there was one item I had not turned off and it seems to be making a significant difference: Wifi notification. (Menu --> Settings --> Wireless controls ==> Wi-Fi Settings --> Network Notification.)I have run across several theories as to why this would work. Some suggest that when you are walking outdoors (especially in an urban area), the wifi notification function encounters (moves in and out of) a lot more wifi networks and that the stuttering occurs when it is sampling or processing each of these new networks. In any event, turning this feature off seems to have made a significant difference. This seems to make a difference even if you already keep wifi turned off.
2. The other line of potential causes could be a problem with signal strength. One post suggested that bluetooth signals are stronger (or are reflected back) indoors or in a car -- but simply dissipate when you are outdoors. The suggested fix for this (as odd as it may seem) is to simply move your phone to the other side of your body. The purpose here is to avoid the bluetooth signal having to travel through your body. It turns out that Altec-Lansing actually makes this same recommendation on their support page. To my surprise, this also seems to work. The bluetooth receiver on the Backbeat headset is apparently on the left side. Being right handed, I have always preferred to carry my phone on the right. But moving the phone to my left side helped to dramatically reduce the stutters and drop outs I was experiencing with the headset.
These two steps have really helped to solve this problem for me. Using my bluetooth stereo headphones has become a real joy instead of an ongoing source of frustration. I hope this experience can be helpful to others.
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Oct 19, 2009
Is this a hard or soft limitation?Will the new roms support all bluetooth profiles?Also, is there any way to pipe my music to my Jawbone 2?I know my previous 8525 winmo I had to load a app to pipe sounds to the headset.
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Feb 19, 2012
I use a BT A2DP headset with route planners Sygic and Navigon running on a HTC Flyer tablet with Android HC. With every spoken instruction the first 2~3 seconds are lost because of some delay when audio is started. I know for sure that this delay is not in the headset.
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Nov 28, 2010
One thing that I really like about the phone is the ability to play music from my phone to my car stereo via Bluetooth because it has the A2DP. No wires and I can control the music ON the deck itself instead of the phone. I've updated the phone with the leaked froyo about 2 days after it was leaked. I noticed that I couldn't play music from my phone to my car stereo anymore via bluetooth. I am able to take calls fine via bluetooth while I am driving, it just won't play any music.
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Jan 10, 2010
im currently looking for the way that my app knows when the phone has being paired and connected to a bluetooth headset device.
I read something about this intent, but not on the Reference documentation of http://developer.android.com
android.bluetooth.a2dp.intent.action.SINK_STATE_CHANGED
Is this actually working, is it officially supported.
I mean, can we just register a broadcastreceiver to handle this intent , check for the EXTRA_STATE string extra to see if it equals STATE_CONNECTED and be sure that the phone is now connected with a bluetooth headset device ?
What about this BluetoothA2dpService class? There is no official documentation about this, everything i found i from code snippets of the android OS source code.
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Nov 3, 2010
I have a sprint anycom bluetooth reciever connected to my car stereo. I think it only supports the A2DP bluetooth profile (no hfp).Right now the music plays through the car stereo just fine but when I get a phone call it does not. Ideally I would like to have the phone call audio go through the stero and use the phone's microphone as if it were on speakerphone. Is this possible?My phone is a g1 running the latest experimental release of cyanogenmod rom.I would love a built in solution but I think the ability to do that is so non standard it wouldn't exist. An existing marketplace app with the ability would be great, too. I have not done any android development but I am a java developer, so a pointer on how to do it programmatically (or that it is not possible) would be great, too.
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Jun 12, 2010
With my Instinct, I could browse the pics etc on the phone from my Macbook Pro via Bluetooth. When I try to browse the EVO over bluetooth, I just get connection errors. Is this possible to do?
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Mar 20, 2009
I meet some problem while using cupcake bluetooth handsfree.
1. Phone only can pair with pin "0000" BT headset automatically, but never pair succeed with headset with pin "1234" (never prompt pin code dialog for input?)
2. Connecting BT headset always fail if the BT headset only suport HFP/ HSP profile(on A2DP). Any one familiar it?
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Nov 26, 2009
I'm going to post this in the Motorola droid forum as well.I have searched all over and even read the user manual for my wife's droid eris. I have a Motorola droid and I cant send pictures to her or vice versa. When I try to pair the bluetooths,I get a dialogue box that asks for a PIN,so as it suggests, i tried 0000 and 1234.It says on my Moto droid, cant connect with Eris and on my eris it says, paired but not connected. Any help with this would be greatly appreciated.I am merely trying to send pictures and media back and forth between the two phones.
Problem No. 2
We both have the BUMP application where yo can bump info between the two phones. Well as the instructions suggest,I open bump on both phones and bump them. When i do this, it says "Please Bump Again" and then at the bottom it says "you were the only person that bumped" ON BOTH PHONES it says this.What is the problem here? I cant find any help on this,even on their website.
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Jun 8, 2010
I make a call and it connects but I can't hear them and they can't hear me. It doesn't matter if it is a incoming or an outbound call. Sometimes I have to power down the phone and turn it back on, the call then connects correctly. I'm totally bewildered!!! I have fresh 2.1.2/ a gumbo kernal.Any advice and help is greatly appreciated.
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Jun 14, 2010
Is there a program that runs on the EVO that produces the best sound quality while listening to MP3s? I have some Shure headphones that I use with my itouch and they sound great. The EVO sounds just "OK". Anyone have a player that they use that works better than others? Maybe one with an EQ?
I am using (3) cubed as my player and like the features, but just wish the sound was a little better.
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Apr 21, 2010
Does anybody have any clue of what we can expect from this phone in terms of sound quality? I'm an iPhone 3G user (), and I'm very pleased with the audio quality on the device. I'm something of an audiophile, and will be using these babies with my Evo, when I get it.
So, not having owned an android device before, how does the audio hardware generally stack up? I'm quite exacting, but anything close to the 3G should be good enough for me.
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Sep 18, 2010
The Evo's video sound quality is amazingly terrible - which begs the question...can it be improved or are we stuck with unusable "hi-def" video? I'm looking for why it's so bad. Codec/bitrate/compression issues or what?
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Apr 6, 2010
I don't have HTC desire but i was wondering how good is the sound quality? Like compared with iPod touch or a proper music player.
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Oct 7, 2009
I joined the forum a week or so ago, just before I got my new HTC Hero on Thursday and it's taken me until now to drag myself away from it to visit the forum again.
As much as I'm addicted to the phone, I was a bit disappointed the sound quality wasn't great- comes out a bit 'tinny'. I got myself some Sennheiser CX 500 earphones and it seems now the sound it much much better.
I just wondered what other people's experiences were with the music/sound quality on the Hero...
Also, if it's not too much to ask further, what music player do you use? I've got Rockon and the default player and kinda like them both but neither are perfect...
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