Greetings and salutations all.
Here is my problem. I have HBH-300 bluetooth handsfree and the sound quality of this hf is superior (to my taste) to any other I have tried.
This, however is not the case with it connected to TyTN. The sound quality of the earpiece is very poor (like all the f's and s's gets badly distorted). I have tested TyTN with 3 other bt hf:s (Nokias and Jabra) without any problems with the sound quality. The mic quality appears to be the same as with other phones according to the other person of the phone calls.
I've tried modify the registry acording to the idea of enhancing the stereo bt sound quality (tho this is just a mono hf) and tried to lower the value of the bluetooth speaker, but no luck.
So, any idea if there's anything for me to try to be able to use my beloved HBH-300 or is it just the Nokia/Jabra way from now on ?
The entire (long, very long) document, including real-world audio samples and the results of all 15 tests, can be found here.
This experiment was inspired by this article by Menneisyys. This study clarifies several of his previous findings with more concrete evidence.
The Bottom Line
Using the Microsoft Bluetooth A2DP implementation results in distortion at 5512.5 kHz and its harmonics at 11025, 16537.5, and 22050 Hz.
Additionally, at least with the Logitech Bluetooth 2.0 USB dongle:
BitPool: Reduces distortion (particularly at 5512.5 Hz) as BitPool increases
UseJointStereo: Has no effect
SampleRate: 1) No difference between 44.1 kHz and 48 Khz; 2) Sample rates of 22,050 Hz, 32 kHz, 64 kHz, and 88,200 Hz can cause accelerated playback at certain bitrates. Not once did I experience a case of decelerated playback, however.
Unconfirmed: I think there's a tiny bit less distortion with headset and UseJointStereo = 0 (I don't have a way to test since I can't capture the output of the headset for analysis like I can with the Logitech dongle).
Of course, your results may vary depending on the capabilities of your gear.
Wow, you did very professional work here! Concluding, what would you say are the best settings to put for best audio?
Thanks, Horst
I've seen quite a few reports that a BitPool of 48 is the best for them, so that wouldn't be a bad place to start.
Here's my experience:
With my car audio system (Sony MEX-BT5000), 48 is also the sweet spot. Even just one value higher (49) results in skipping even when placed right next to the receiver. At 48, I can even keep the phone in the back seat (not that I do--it's usually in the belt clip).
I've changed headsets to a Sony Ericcson HBH-DS970 since I did these tests. It's much more forgiving than the wiRevo. I don't know how high it can go since the car system is the weaker of the two and I'm too lazy to figure out since then I'd have skipping in the car
I bougth a Herald, and A2DP playing very badly with my Nokia BH-501
I had Nokia 6681, and there are a program MSI BluePlayer, witch send MP3(not A2DP)data to headphones directly, and quality was very good!
But here i used all players, but sound is with metallic echo(don't know how to explain). It's fixable?
P.S. I'll try MSI BluePlayer Java
http://4pda.ru/forum/attach/319748/MSI.rar
MSI BluePlayer for PPC, but it working slowly... and can't minimize
Search for the registry keys to adjust the bitRate and such. Search google for A2DP quality of bluetooth quality.
i set all values to -1.
I have GOOD quality, but I HATE metallic echo.
simply try BluePlayer and you will understand.
I recently upgraded from a Nokia N95 to a Touch HD. I've been trying to get my Sony DRBT21 bluetooth headphones to work with the touch HD. The phone pairs with the headphones, but the sound quality is poor with no bass and sounds crackly.
Additionally when I turn off/on the headphones, only the headset and microphone profiles connect back to the phone, not the A2DP stereo part. The only way I've found to get it to reconnect is to repair them.
Any idea if this is a known issue with A2DP headphones on the Touch HD? I'm not expecting to get brilliant audio quality, but as it is right now with crackles and distortion it isn't worth listening to.
Just wondering if anyone has any ideas on how I can fix or optimise this?
Cheers
Was the device properly paired? Were you prompted for the PIN? If not, do so manually by going to Bluetooth settings and pair the headset from there.
As for the A2DP not being available when reconnecting, this seems to be a known issue as I experience this intermittently with HTC's own Bluetooth and another third-party one, too. This issue was also observed on my previous HTC Polaris! A workaround for this issue for me is to power off Bluetooth and then power it back on: not a good solution!
It prompted for the PIN which I entered, and looks to be set up correctly. The main issue seems to be the background static when listening to music (hissing and crackling). Is there anything in Advanced config that could be tinkered with to try and alleviate the problem?
This won´t help you:
My Motorola S9 and HT820 (Both A2DP/AVRCP) working fine with HD and Diamond. Also I had some difficulties reconnecting the first times, due to the not used pairing-PIN. The motos doesn´t need it. The HD and the diamond needed some time to accept this
Now they reconnect as Hedset and Stereoheadphons.
Maybe there is another BT-Master (your old phone) active that occupies the A2DP connection with your headset.
I have one HD and S9, sometimes it's a little hard for them to connect but the sound can be very good, the only problem is that with high BitPool values above 30 (medium quality) it's very easy to break the sound when the HD is in our pockets and we are outside the house.
hi, im using the same headphone with you. you got that cracking noise with no bass because it's playing via the headset function, not as stereo headphone.
try disable the heatset option in the bluetooth, then open your music player and try again.
And yes, when u turn off your headset improperly. i.e. turn off from the power button, and not through bluetooth -> disconnect, then turn off... you will have to go to setting -> set as stereo headphone...
I had a play around with Advanced config and found that if I change the max bitpool from 30 to 50, the crackling and static disappears. It seems better now. Many thanks!
Edit: Changed to Max Bitpool 80 and Min 65 and the quality is brilliant. Found some further information from a post on another site (PPCSG) which may be useful to any with a similar issue:
Using ACT (Advance Config Tool), go to BLUETOOTH:
*below are my settings->
-Use Joint Stereo: Yes (default)
-Bitpool: Very High
-Max supported bitpool: 80
-Min support bitpool: 65
-Sample rate: 48000Hz
*My settings may not be the best, therefore you may want to trial and error.
The following shows the named values for the A2DP\Settings key.
By default, A2DP uses a bitpool of 48. A lower bitpool value improves system performance. Increasing bitpool to a higher value causes an overhead on Bluetooth and system resources.
Microsoft suggests the following bitpool values for optimal buffer sizes.
30 - Low audio quality
40 - Medium audio quality
48 - High audio quality
58 - Excellent audio quality
-The maximum reported bit pool value, which can be negotiated with the peer device. Default value is 80.
-The minimum reported bit pool value, which can be negotiated with the peer device. Default value is 14.
-SBC sample rate to use. Default value is 44.1 KHz.
least of your worries...
what bothers Me more is that the old A2DP bug from the HTC Diamond has made its way to the HD ROM, in that if you listen to music via A2DP and recieve a phone call, you take that call and end that call then your music continues playing through the phone speakers! You have no idea how embarassing this is on a train!
that doesnt happen on mine, go straight back to my headphone again...
Even though it doesnt happen on mine, to be safe I plug a dummy headphone jact to the phone so even if bt gets disconnected, no sound goes through decice speakers. Makes me feel comfortable on the train. This was also an issue with Cruise which was addressed by a hotfix later on.
gurluver said:
try disable the heatset option in the bluetooth, then open your music player and try again.
Click to expand...
Click to collapse
Tried that, and the difference is staggering!
I can now confirm that it isn't a hardware issue, that these phones (Sony HBH-IS800) are capable of sound quality just as good as other Sony in-ear jobs. Thanks for that!
Now, all I have to do is try to sort out the drop-outs. It seems as though the slightest barrier can cause drop-outs, for instance, putting the phone in my jacket pocket, or passing my jacket sleeve in front of it. Not sure whether it's the particular material of my jacket, or the metal in the buttons, or what, but it's hugely irritating.
Funnily enough, seems to make a difference if I have the connecting wire behind or in front of my neck. More to follow on this one....
Cheers
Pete
noise ?
For people using the HD and motorola S705 as bluetooth A2DP : do you have also an annoying background noise when listening to quiet music ? Or before the sound starts. You know a noise like pffffffffffffffffffffff
HTC P3600
Hello,
I already installed the tornado_a2dp.cab on my PDA HTC P3600 with WM5. but I can't sincronize MP3 (Windows Media Player or TCPMP) with my headphones Nokia BH-206.
Anybody help me to solve this problem?
The mp3 sound only worked (10seconds) in Windows Media Player when I press the button to do a call
Hi.
I have done the changes mentioned in this thread and got much better sound when listening to music.
But i still have a static noise when im in a call.
Is there a way to fix this?
mugis said:
I had a play around with Advanced config and found that if I change the max bitpool from 30 to 50, the crackling and static disappears. It seems better now. Many thanks!
Edit: Changed to Max Bitpool 80 and Min 65 and the quality is brilliant. Found some further information from a post on another site (PPCSG) which may be useful to any with a similar issue:
Using ACT (Advance Config Tool), go to BLUETOOTH:
*below are my settings->
-Use Joint Stereo: Yes (default)
-Bitpool: Very High
-Max supported bitpool: 80
-Min support bitpool: 65
-Sample rate: 48000Hz
*My settings may not be the best, therefore you may want to trial and error.
The following shows the named values for the A2DP\Settings key.
By default, A2DP uses a bitpool of 48. A lower bitpool value improves system performance. Increasing bitpool to a higher value causes an overhead on Bluetooth and system resources.
Microsoft suggests the following bitpool values for optimal buffer sizes.
30 - Low audio quality
40 - Medium audio quality
48 - High audio quality
58 - Excellent audio quality
-The maximum reported bit pool value, which can be negotiated with the peer device. Default value is 80.
-The minimum reported bit pool value, which can be negotiated with the peer device. Default value is 14.
-SBC sample rate to use. Default value is 44.1 KHz.
Click to expand...
Click to collapse
I am having the same problem as you on my HTC Incredible. Any idea of an app that lets you configure those settings for Android?
I am testing a Roadnav S160 in my car, but the BT audio quality is fairly poor. Audible distortion on highs etc. I dug into the logs and it looks like it's choosing an SBC bitpool of 32, which isn't great. Is there some way I can boost the SBC setting to a more modern 53?
I am on listening here , as i also have this unit and people complains that they can hear me not so clear...wish i can do something about it..
Peder