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A2DP with HT820 Headphones - Sound crackling - Solutions?

Hi All,
I have a o2 xDA Mini S aka Wizard/QTec 9100, etc...
I've been lurking about this forum for some months now, and the other day I decided after reading good news of the Motorola HT820 headset that this would work correctly if I used the A2DP .cab file supplied in these forums.
Well, I did that and it works as intended but I seem to get a background crackling noise which gets worse the louder the music is.
I can seem to reduce it, but it never quite goes away... I've noticed a few odd messages on this forum with other users with this problem but cant determine if its something when the HT820 is paired with a 'Wizard' or not.
I've tried about 5 different PocketPC audio music players and cant seem to determine if its the phone, the bluetooth in some way or the headset itself... However, when I plug the headset into an audio jack it sounds PERFECT.
I suspect it may be the bluetooth bandwidth in some way as the headphones work fine when used as normal headphones...
After 3 days of messing with it, I've come here to hopefully get some help, determine where the problem is and hopefully help with a fix.
My ROM is the original 2.21.4.1 WWE that originally came with the phone about 4 months ago. Is anyone else getting this problem, knows a fix or has any info as to what it ould be? If we all work together, maybe we can figure this out...
Thanks all.
Plonka2000

Hi Again,
I've been experimenting some more the last day and I cant quite seem to figure any more leads on what the problem could be related to.
Does anyone else experience this issue?
Thanks all.
Plonka2000.

I have experienced the same thing, especially with songs that are bass intensive. I have not found a solution.

I have experienced the same thing, especially with songs that are bass intensive. I have not found a solution.

Same here unfortunately
I've been experimenting a lot too, but presently still have a £40 set of headphones that sound worse than the ropey ones originally bundled with the Mini-S :evil:

Its at least good to know that other people are having the same issue.
Are you both using the Motorola HT820 as well?
Have you tried pairing it with another device to test the quality of the sound from another source.
I tried with my PC but my USB bluetooth adaptor is only BT1.0 compatible. Pairs but doesnt do anything...
What ROM versions are you guys using?
I'm still on my original 2.21.4.1 WWE that came originally with it.

Yeah - same headphones, same ROM (which I think is the latest one in any case).
I also have an XDAIIi which I wiped clean and use purely as an in-car GPS ATM. As soon as I get a chance (unfortunately rugby and beer eats up most of my spare time :? ) I'll see what I can find re an A2DP hack for the IIi and try the headphones on that.
Will post here with results (probably Monday)

mono bluetooth streaming on the htc hero for sprint

so check it out here is a workaround on the htc hero for sprint to allow you to stream music to a mono (single ear non stereo) bluetooth headset. ok so my bluetooth does not have a2dp capabilities but this works still. this is not my idea its off the android forums i found after doing some digging.
you have to have your phone on vibrate and the music, podcast whatever has to already be playing and your bluetooth already has to be paired.
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11-19-2009, 12:43 AM #8 (permalink)
RedDot
Junior Member
Join Date: Nov 2009
Posts: 5
Device(s):
Got non A2DP Bluetooth headset to play Music / podcasts
I went searching for a way to play my podcasts over a non A2DP bluetooth headset. I couldn't find anything, but I did figure out a way to make it work. I'm using a Sprint HTC Hero phone.
1. I went to the phone and dialed '**' (2 stars) which creates a 'p' for pause. Then press call. This enables the headset without actually placing a call.
2. After this I started doggcatcher (or other audio / video player) and it played through the headset. Everything went through the headset after this point.
3. In order to stop playback to my headset I just called my voicemail and hung up. At that point, audio was routed back to the speaker.
I don't know if this will work on other phones, but it did on mine.
good luck.
EDIT: I have found that it only works when my ringer volume is off or on vibrate. Also, the media volume needs to be turned up separately -- Either from the settings control or prior to performing the 'p' call. The volume rocker only controls the Bluetooth call volume after the bluetooth headset is active.
Last edited by RedDot; 11-24-2009 at 12:34 AM.
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now i give full credit to this guy. i just couldnt find it anywhere after looking all day. so i figured i should post it here. mods sorry if its already posted

Holy crap!!!!! Greatest discovery ever!!!!!!!!!!!!

Kcarpenter said:
Holy crap!!!!! Greatest discovery ever!!!!!!!!!!!!
Click to expand...
Click to collapse
Did it work for you too ? I'm so glad I've stubbledon this . Ive been streaming over my blutooth for like 30 min

Bump!
Does this really work? Is the quality ok? I'd love to avoid spending the extra dough on one of the few pieces that supports a2dp...

raynda said:
Bump!
Does this really work? Is the quality ok? I'd love to avoid spending the extra dough on one of the few pieces that supports a2dp...
Click to expand...
Click to collapse
Works great.
Quality of the audio all depends on the quality of your headset. Personally I stopped buying expensive ones. I buy about 1 a month any more. I lose them everytime.
I guess it can sound a little staticy or muffled at times, but I think thats more Pandora and bad reception in this Tin Can I call an office.

Works great for voice on my moto H605, but music isn't very good.

Awesome!!! Ive been searching for this for a while...

This is so cool!! I have a $30 head set from wall mart that is about good for nothing. But now I have something I can do with it.

I was able to listen to my music with my bluetooth on my last phone (which really helps to pass the time at work).
I was so excited to get the HTC Hero for Christmas this year and it is such a great phone. But I was not so excited after I discovered I could not listen to my music with my bluetooth.
Thank you for thinking of others and posting this! I spent so much time trying to figure out a way to fix this. This works great!

GSM Hero
Hey guys,
I just bought a Voyager Pro, because I thought I can listen to music. After I tried it, it didn't work. And I found out I should have one with a2dp.
I can see, that you, with CDMA can do it now.
But do you have any idea, how could I do it with my GSM Hero?
Thanks in advance,
Roland

What kind of battery drain are we looking at when using this?

This only works with 1.5 & possibly 1.6 ROMs. I haven't had any luck on DC v1.0, which is a 2.0/1 ROM.

The bluetooth stack for 2.1 Roms isn't fully complete from what I have figured. a2dp may work with an official release.
EDIT:
Looks like Bluez has supported A2DP since about October 09(v4.15), maybe it didn't make it into our builds.

A2DP Bluetooth on 2.1 Based Roms - In search of a final answer

Hi all,
Apologies in advance if this is in the wrong forum, but it does pertain to the array of 2.1 ROMs out there.
I am in search of a 2.1 based ROM that has fully functioning A2DP stereo bluetooth capabilities.
Ive used Fresh 2.0d for a long time (still do), tried DamageControl 2.08 etc.
Only one that I had some success with was DarchLegend v5.0.5, but it seemed to have problems getting my contact pictures from Facebook etc. (Admittedly I may have to try it again).
My question is whether anyone can recommend a ROM where A2DP is known to work perfectly?
Also, a more general question: are ROMs like Fresh and Damage Desire-based as opposed to Darch being Legend-based? If this is the case, what are the benefits of a Desire-based ROM over a Legend-based ROM?
(I fully admit that I don't know enough about this stuff...I've tried to search but am still in need of answers - please help a curious guy out!)
Thanks for all the help

I've used an a2dp stereo bluetooth (Blueant X5i to be specific) with the ZenEXP (mytouch based) rom, with Fresh Toast 1.1 and with Fresh 2.0d. ZenEXP seemed the best to me, but they're all glitchy. Slacker works fine with the headset. Pandora will stop playing music over it after the screen turns off. I don't use the built in media player so I can't say how well that works. NPR stream & tweet and iheartradio both worked with it just fine too. If it gets a hiccup though, it'll stop the audio and the bluetooth will get stuck saying it's disconnected and it won't reconnect properly until you restart the phone. Pandora did this any time the screen turned off.

Just yesterday I upgraded the firmware for my blueant Q1 and streamed some audio from slacker just fine. Also checked htc music app and worked too. Ill do more extensive testing tonight. Im on Damage control v2.08 which is a sprint hero based rom.

I notice that both of you above are using Blueant...
Here's my problem...I have both a Jawbone ICON and Bluetooth Stereo speakers in my 2010 Mazda.
The Jawbone seems to work fine when I upgraded it to support A2DP, but I just don't really like it because its quiet and outputs just through one speaker (obviously). My Mazda is the one Im really trying to get working...it worked flawlessly on a 1.5 based ROM (proving that the speakers/bluetooth in the car itself works)...its just on these 2.1 based ROMs.
Any ideas?

dom2114 said:
I notice that both of you above are using Blueant...
Here's my problem...I have both a Jawbone ICON and Bluetooth Stereo speakers in my 2010 Mazda.
The Jawbone seems to work fine when I upgraded it to support A2DP, but I just don't really like it because its quiet and outputs just through one speaker (obviously). My Mazda is the one Im really trying to get working...it worked flawlessly on a 1.5 based ROM (proving that the speakers/bluetooth in the car itself works)...its just on these 2.1 based ROMs.
Any ideas?
Click to expand...
Click to collapse
I have a 2010 Mazda 3i with bluetooth that worked fine with android 1.5 but the audio is messed up with android 2.1, it plays at 2 times the normal speed and will randomly slow down and sputter at times. I am thinking about rooting my phone in a couple days and playing around with the bluetooth files if possible since you aren't having any luck with any of the 2.1 ROM's out there

bluetooth
My phone worked perfectly on bluetooth in my tacoma with car m_media. Since 2.1 it works sometimes. The sprint store told me it was not the phone which I know it is and I should get a newer bt device. It was new last year. I have now found if I go into airport mode for a few seconds and then go back the bt will work until I get away from the truck again. I have to do the airport thing everytime I come back, but it will work.

Jawbone A2DP update
Anyone with jawbone can now use earphone as headphone for 'any' media from Hero, http://mytalk.jawbone.com/jb2/mytalk/beta, hope this helps!
jjjjayd13,

[Issue][Solved] How to solve microphone problem when headset connected

Hi folks!
First of all, thanks a lot for all the dev team and community for letting me enjoy at a 200% my hd2. I am currently a satisfied and happy WP7 user planning in getting a dual boot.
So... what concerns us here, is the problem that when connected to a headset, microphone stops working. i guess that is because the phone is unable to detect whether there is or not a microphone into the headset connected.
So the solution I am using is a standard (not even 5€ cost) blackberry/htc/.... headset cable which can de-attach the earphones.
I've attached the picture of the one I sell in my shop in Spain. Button working perfectly for voice-commands and you can connect any standard 3.5mm jack earphones.
Why bother? so... basically i have a 3.5mm jack in my car to connect my phone to it.... and only thing I hated was that noone could hear me in a call while driving.
One more happy customer from the xda community!
Cheers guys!
Jags
PD: waiting for a new rom from the wp7 community...... :'(

This is the solution I am looking for. I am currently don't have a radio in my car and my Leo is my all for music. Its going thrue a DSP and in to an amp. Sounds great! Care to share make and model number of the piece you got there?

[Q] Is it possible to have audio through both speaker and headphones?

I know that software can choose between speaker and headset even when the headset is plugged in (since the FM radio can do that). But is it possible to force audio out of both the headset and the phone speaker? I ask because I have an audio docking that I'm going to use in the car, and if this is impossible, I'll have to put up an extra speaker and amp for when I listen to the radio but want TomTom to warn mea bout those pesky speed cameras... So is it possible with a sneaky trick to choose both headset and speaker?

That can only be done over at the kernel's and the framework's side. The best bet is to customize the kernel. Detection of the headset plugging/unplugging is done by kernel’s switch driver and the event is sent to 'HeadsetObserver.java' which broadcasts the intent 'Intent.ACTION_HEADSET_PLUG' with information about state as plugged/unplugged. This is received by 'PhoneApps.java' and the audiomanagerr is informed to turn on/off the speaker which further passes the information to Libaudio.so (AudioHardware.cpp). These information is passed to the kernel to switch between the speakerphone and Headset. This might differ with Android 2.3, but forcing the kernel to play sound to both the headset and the speaker might be the only way. The first few actions are done by the framework itself. You can try or suggest this feature to the CM team. I know this is not what you want, but for the time being, you can perhaps use a dual audio jack splitter and connect your headset and a speaker. Alternatively, there a few apps in the market which enables live streaming on your PC over Wi-Fi. You can try streaming the media so that the audi is played by the PC and the connected speakers. At the same time, you can plug in your headset. This should work, but no guarantees...hope this helps, and i have to say that it will be an awesome feature if the devs can find a way to cook this feature into a stable android build!

Android? Yuck! Good on tablets, totally hopeless on phones! Was going to use my brother's Desire for on day, begged him to give me back something that actually worked efficiently after two hours! No, I'm talking about good old Windows Mobile 6.5 here. Didn't really think I'd have to specify that in a thread about general HD2...

While it might be possible, I doubt anyone will do it.
however, you can get audio through both headphones and external speakers using a special jack. it has a male part on one side and two female parts on the other.

of course. I've used the jack splitter on several things (I do a lot of work with custom installation of computers as whole house media servers). And that's what I meant in the first post when I wrote "if this is impossible, I'll have to put up an extra speaker and amp for when I listen to the radio but want TomTom to warn mea bout those pesky speed cameras."
But I have found sort of a solution: Start the HD2's FM radio, switch that to playback through the speaker (which is why I know this not only might be possible, but is possible with software, since the FM radio can play through the speaker even with a 3.5 mm jack plugged in) and mute the radio. Then all sound will come through the speaker. Kind of a pain in the ass to do it that way. I have found a Mort script that does it, with a few modifications, but I haven't had the time to check that out yet.

that's a weird workaround XD
I'll try it later.

Yeah, weird all right. Actually it's been used before. Found it on Google, with a reference to this thread: http://forum.xda-developers.com/showthread.php?t=444581 Another phone, same method.