Database Develop

Increasing Bitpool for better Bluetooth Audio Quality

Hi,
i have read now a lot of threads to find a solution to raise the bitpool on my HTC One. but i didn't find the answer.
So the problem is, that I stream a lot of music over BT when im driving. The Audioquality on my previous devices (SGS 3, Apple iPhone 4S) where relay good. I had the same problem with an old HTC Desire. I think the bitpool is in my HTC One to low for "not hearable audio flaws".
I have currently the latest radio with the ARHD 10.2 runnning. Has anybody a solution, how i can easylie change the bitpool without the need to recompile some libs?
Thanks for your help,
Sascha

So noone has an idea?
Would it be possible to wirte a module for the xposed framework, to override the function that retrives the max bitpool size?
It would be great, when someone could help me?
Thanks in advance,
Sascha

I would be interested in this as well
Sent from my HTC One using xda premium

I posted an explanation and a question in a different thread, but will repeat it here, maybe will help in the discussion/solution.
When I use my car stereo (with built in bluetooth) to place phone calls the people on the other side complain about the sound quality. Like there is some additional noise as well as the sound is distorted. As a side note, I didn't have this issue with iPhone 4 or Nexus 4.
When I switch to the phone speaker the sound improves dramatically.
Now, one friend suggested that it might be the noise canceling microphone. I am guessing, in car stereo mode I am using the microphones in my car and the phone is been used only to transmit cell data via bluetooth. When I switch to phone speaker, then I am using the microphones built in the phone, and the noise canceling function works fine.
My 2 cents, what about if the noise canceling microphone doesn't turn off in car stereo mode, which I think it should do. This would mean that there will be interference between my car microphones and the noise canceling microphone in the phone.
Is there a way to check it with further tests?
Thanks.

doenersoldat said:
i have read now a lot of threads to find a solution to raise the bitpool on my HTC One. but i didn't find the answer.
Click to expand...
Click to collapse
I'd be interested in an answer to this one too.
---------- Post added at 05:34 PM ---------- Previous post was at 05:21 PM ----------
This thread seems at first glance like it might offer a solutuion... but as one of the two files it suggests replacing doesn't even exist on my HTC One, I'm not very confident it'll work:
http://forum.xda-developers.com/showthread.php?t=2184333

I dont think we find a solution for this problem at all. Ive changed now from sense based Rom to GPE 4.3 Rom.
The quality got a bit better now but i dont think its the same quality then on my prev. Iphones / sgs3.
In my car i hear now music from a USB stick, the quality is way better then any Bluetooth device i heard so far. For everyone which could use usb, i think this is a nice alternative. 20 € for a 32 GB stick + 3€ for an USB OTG Adapter. And you can copy your music from the one directly in the car on your USB stick.
Greets Sascha
Gesendet von meinem HTC One mit Tapatalk 4

doenersoldat said:
In my car i hear now music from a USB stick, the quality is way better then any Bluetooth device i heard so far. For everyone which could use usb, i think this is a nice alternative.
Click to expand...
Click to collapse
Sadly that's not an option for me. The reason I use Bluetooth is to stream phone audio to my hearing aids (using a device called a Siemens MiniTek); if I had a free choice of Bluetooth devices I might pick one that can use apt-X as well as SBC for a codec - but I don't have a choice.
No one knows of a way to change the SBC bitpool value, then...?

[Q] Camcorderproblem: Only one channel recording instead of stereo after 4.4.2 update

After I updated my HTC One to Android KitKat the Phone only records with one channel (left channel) instead of two (stereo) when using the camcorderfunction.
Anyone having the same issue?

What Rom are you on? I wrote about that when I installed Viper over the weekend. Noticed exact same thing. Thought my second Mic was dead. The only one active is the Mic on the bottom.
But, I returned to my 4.4 stock kit Kat T-Mobile US Rom, and stereo recording is working.
If you can list what Rom you are on that would be great.
Sent from my HTC One using Tapatalk

gustav30 said:
What Rom are you on? I wrote about that when I installed Viper over the weekend. Noticed exact same thing. Thought my second Mic was dead. The only one active is the Mic on the bottom.
But, I returned to my 4.4 stock kit Kat T-Mobile US Rom, and stereo recording is working.
If you can list what Rom you are on that would be great.
Sent from my HTC One using Tapatalk
Click to expand...
Click to collapse
I'm using the stock rom. Just updated from stock 4.3 to 4.4 (4.19.401.9) I'm from Holland. After the factory reset the problem still excist

Not sure...we need more testers to try some video recording and post results.
The problem is that testing a video and relying on the phone speakers to show the problem won't work, since the phone speakers will play the left track through both speakers, giving the appearance that audio was recorded in stereo...
The video needs to be listened through earphones, or copy the video from the phone to PC/MAC and then give it a listen.

gustav30 said:
Not sure...we need more testers to try some video recording and post results.
The problem is that testing a video and relying on the phone speakers to show the problem won't work, since the phone speakers will play the left track through both speakers, giving the appearance that audio was recorded in stereo...
The video needs to be listened through earphones, or copy the video from the phone to PC/MAC and then give it a listen.
Click to expand...
Click to collapse
I've copied the video to the pc. The sound is still coming from the left channel. I hope this isn't permanently.

Chdcmac said:
After I updated my HTC One to Android KitKat the Phone only records with one channel (left channel) instead of two (stereo) when using the camcorderfunction.
Anyone having the same issue?
Click to expand...
Click to collapse
Anyone, please? Am I the only one here who has this problem with 4.4? (OTA)

I've seen a few posts in the Rom threads where people have brought this up. Saw a post in Revolution and Insert Coin threads.
But we need more people to test video recording and then listen through ear buds or on computer.
Anyone who is on the latest and greatest Sense 5.5 kit Kat builds, can you please make a short video using the Sense camera app, and listen to it through headphones or on computer? Do you only have audio coming out of the left channel?
Sent from my HTC One using Tapatalk

gustav30 said:
I've seen a few posts in the Rom threads where people have brought this up. Saw a post in Revolution and Insert Coin threads.
But we need more people to test video recording and then listen through ear buds or on computer.
Anyone who is on the latest and greatest Sense 5.5 kit Kat builds, can you please make a short video using the Sense camera app, and listen to it through headphones or on computer? Do you only have audio coming out of the left channel?
Sent from my HTC One using Tapatalk
Click to expand...
Click to collapse
Yes. But strangely, when I restart the phone and make a video, then it works perfectly :S But when I make a second video, the audio comes only from the left channel.

I can confirm that.
There is a command, which HTC uses to activate the camcorder mic. Maybe HTC forgot to call this procedure when restarting the 2nd recording.
The function is already present in the phone application to enable the camcorder mic for the noise canceling function.
I use this as a workarround to enable stereo recording.
Maybe someone can compare the old and the new video app to find the "enableCamcorderMic" Function and make it available for other applications. There are some applications which allow to select between the main and the camcorder mic. They work on most devices, which have 2 mics, but not on the HTC ONE. This can be tricked out by switching to the phone application while a recording-application already records. Start a call and cancel the call. Then return to the recording app via taskmanager and you will have 2 channel recording. Unfortunately this does not work for the video app, which cancels video recording when switching to the phone app. But I did not need the workarround in the past for the videoapplicatiom. But now HTC has a bug in it. I hope someone could be able to isolate the "enableCamcorderMic" function.
Ralf

audioralf said:
I can confirm that.
There is a command, which HTC uses to activate the camcorder mic. Maybe HTC forgot to call this procedure when restarting the 2nd recording.
The function is already present in the phone application to enable the camcorder mic for the noise canceling function.
I use this as a workarround to enable stereo recording.
Maybe someone can compare the old and the new video app to find the "enableCamcorderMic" Function and make it available for other applications. There are some applications which allow to select between the main and the camcorder mic. They work on most devices, which have 2 mics, but not on the HTC ONE. This can be tricked out by switching to the phone application while a recording-application already records. Start a call and cancel the call. Then return to the recording app via taskmanager and you will have 2 channel recording. Unfortunately this does not work for the video app, which cancels video recording when switching to the phone app. But I did not need the workarround in the past for the videoapplicatiom. But now HTC has a bug in it. I hope someone could be able to isolate the "enableCamcorderMic" function.
Ralf
Click to expand...
Click to collapse
Hi - can you explain in more detail what your workaround is? Take first video - then open phone app - then go back to camera app? Or does this not work anymore.
Anyone else experience this issue of only getting stereo recording in the first go around...exit camera app....go back to camera app start a new video.
listen to the second video you took through headphones or on computer - do you hear both channels?

gustav30 said:
Hi - can you explain in more detail what your workaround is? Take first video - then open phone app - then go back to camera app? Or does this not work anymore.
Anyone else experience this issue of only getting stereo recording in the first go around...exit camera app....go back to camera app start a new video.
listen to the second video you took through headphones or on computer - do you hear both channels?
Click to expand...
Click to collapse
I described it more detailed here But unfortunately it does not help for the new camera bug, because the video application stops recording, when switching to the phone application. Normal audio application continue recording when taking or receiving a call, so they benefit from the oping of the camcorder channel which the phone application does for the noise canceling funciton.
Did you try to install the old video application from older stock ROM to your phone. Maybe that helps.
Ralf

audioralf said:
I described it more detailed here But unfortunately it does not help for the new camera bug, because the video application stops recording, when switching to the phone application. Normal audio application continue recording when taking or receiving a call, so they benefit from the oping of the camcorder channel which the phone application does for the noise canceling funciton.
Did you try to install the old video application from older stock ROM to your phone. Maybe that helps.
Ralf
Click to expand...
Click to collapse
I actually threw on one of the Sense 6 roms. Guess what, no good. Same exact problem.
Something tells me its in the kernel of 4.4.2.
What's bugging me is that no one else either doesn't notice this problem or doesn't care judging by the lack of of comments I've seen. It would be hard to get a Dev on board to look into if there is lack of interest.
Right now I've flashed a Google play rom. While the Google play Roms don't do video recording in stereo at least mono recording is handled correctly, by distributing the source to both channels.
In sense its not mono in that the right side is just dead. Nothing worse than playing back videos on a computer or TV and having the right speaker sometimes on and then off.
Sent from my HTC One using Tapatalk

gustav30 said:
I actually threw on one of the Sense 6 roms. Guess what, no good. Same exact problem.
Something tells me its in the kernel of 4.4.2.
What's bugging me is that no one else either doesn't notice this problem or doesn't care judging by the lack of of comments I've seen. It would be hard to get a Dev on board to look into if there is lack of interest.
Right now I've flashed a Google play rom. While the Google play Roms don't do video recording in stereo at least mono recording is handled correctly, by distributing the source to both channels.
In sense its not mono in that the right side is just dead. Nothing worse than playing back videos on a computer or TV and having the right speaker sometimes on and then off.
Sent from my HTC One using Tapatalk
Click to expand...
Click to collapse
Yes your observation is totally correct. The camcorder mic is responsible for one channel. If it is not available you will get just one channel. In my testings the phone switched to mono recording from the main mic.
I tested to reinstall an older HTC video app via titanium backup, but it did not start.
Ralf

I can confirm this. I just did an RUU and i recorded using the voice recorder and video recorder and both come out with only 1 channel being used and its the left one.
https://www.dropbox.com/sh/xuxe5l1xvqutp0g/JSajfATqqY That has 4 samples in it, 2 using the latest stock update on the sprint htc one m7 and the other 2 are from the sixth sense rom rls2

I am running 4.19.1540.1
EDIT
Ok I see what you're talking about.
Steps to reproduce:
1 Boot to a kit kat sense rom
2 record video A
3 immediately record video B of exact same ambient soundfield. Repeat if desired for videos B1, B2 etc.
4 reboot
5 record video C of exact same ambient soundfield.
Videos A and C are in stereo, video B is in mono.

luigi311 said:
I can confirm this. I just did an RUU and i recorded using the voice recorder and video recorder and both come out with only 1 channel being used and its the left one.
https://www.dropbox.com/sh/xuxe5l1xvqutp0g/JSajfATqqY That has 4 samples in it, 2 using the latest stock update on the sprint htc one m7 and the other 2 are from the sixth sense rom rls2
Click to expand...
Click to collapse
VoiceRecorder was never able to record in stereo, or select the camcorder mic. It stopps, if you change to other app via task manager. So you can not use my workarround to enable the camcorder mic.
---------- Post added at 01:06 PM ---------- Previous post was at 12:32 PM ----------
NxNW said:
I am running 4.19.1540.1
...
Videos A and C are in stereo, video B is in mono.
Click to expand...
Click to collapse
Yes, and following videos D,E, F... Only the first video is in stereo.
So the enableCamcorderMic function ist used in the new video app after reboot. I experimented with killing camera app, gallery and videoplayer after the first video and sometimes I got back the stereo without an reboot. For this I used the app "TaskManager" (not simply the function in the "recent apps" screen). But i could not find a reproducible way.
So we need a firmware switch for this function. Then all apps would profitate from it:
Selecting main or camcorder mic for mono recording.
Using stereo recording.
Using mono recording from both mics. This helps if you held the phone while making notes of a speech (e.g. in university) and recording. On the HTC ONE the main mic points to your body and not in the direction of the speaker.
I hope that one of the devs could find out how HTC enables the camcorder mic in the video app and in the phone application when pressing the call button.
Ralf

audioralf said:
VoiceRecorder was never able to record in stereo, or select the camcorder mic. It stopps, if you change to other app via task manager. So you can not use my workarround to enable the camcorder mic.
---------- Post added at 01:06 PM ---------- Previous post was at 12:32 PM ----------
Yes, and following videos D,E, F... Only the first video is in stereo.
So the enableCamcorderMic function ist used in the new video app after reboot. I experimented with killing camera app, gallery and videoplayer after the first video and sometimes I got back the stereo without an reboot. For this I used the app "TaskManager" (not simply the function in the "recent apps" screen). But i could not find a reproducible way.
So we need a firmware switch for this function. Then all apps would profitate from it:
Selecting main or camcorder mic for mono recording.
Using stereo recording.
Using mono recording from both mics. This helps if you held the phone while making notes of a speech (e.g. in university) and recording. On the HTC ONE the main mic points to your body and not in the direction of the speaker.
I hope that one of the devs could find out how HTC enables the camcorder mic in the video app and in the phone application when pressing the call button.
Ralf
Click to expand...
Click to collapse
I had asked Kernel Dev Flar2 to see if he could reproduce the problem and he could on his M7. He said he might take a look if he has time, but I think he's got the M8 now, so not 100% sure. Hope that he can.
In the meantime - to counter the issue, I've flashed now a Sense 5.5 Android 4.3 Rom on my phone, running on top of KitKat firmware. Stereo recording acts normal the way its supposed to everytime exiting and reopening camera app. So if you need stereo recording, until someone fixes it, I suggest finding a Sense 5.5 Jellybean Rom.
For me its important because I'm always capturing videos of my 6 year old and can't tell her, 'honey hold on, I need to reboot my phone so I can record you in stereo"....
Somehow we have to grab the attention of HTC so they are aware, I hope they don't leave us hanging now that the M8 is out and attention is focused on that.
It would seem to me that everyone who is on a KitKat firmware/Rom probably has this issue - we just need more testers to confirm and then go to HTC on Twitter/Facebook.

gustav30;51474822
Somehow we have to grab the attention of HTC so they are aware said:
Well I have reported the missingaudio recording for normal apps months ago. Even to HTC. I have also uploaded them a audiofile to demonstrate the workarroud, but they told be that they will send it to HTC developer team. I am waiting for months so I decided to share the workaround although it is complicated. I think they don't want other developers use both mics for stereo recording. The people should use the own HTC video app to capture stereo videos. But now they have fallen in their own hole by forgetting to insert the enableCamcorder function in the new videoapp for KitKat. It is ouside the normal Android SDK, so normal developers are not able to use the function.
This is really a restriction and a challenge for developers.
And I think HTC has to react and update their video, because many people will complain the missing stereo on video.
The professional musicians are in small minority, but if you once heard the difference between mono and stereo you will always prefer stereo, because you can better understand even an recorded speech in stereo.
Ralf
Click to expand...
Click to collapse

audioralf said:
The professional musicians are in small minority, but if you once heard the difference between mono and stereo you will always prefer stereo, because you can better understand even an recorded speech in stereo.
Ralf
Click to expand...
Click to collapse
I play piano so I do feel your pain a bit! It would be nice to record some of my sample libraries in stereo especially with these hDr mics
Sent from my HTC One using Tapatalk

gustav30 said:
I play piano so I do feel your pain a bit! It would be nice to record some of my sample libraries in stereo especially with these hDr mics
Sent from my HTC One using Tapatalk
Click to expand...
Click to collapse
Yes you can do that even in KitKat for example with Rec Forge 2 app.
Read my instructions for settings and the workarround. I demonstrate the trick in the attached mp3 file. Listen to the result

[Q] HTC one, disable an audio channel?

Hi,
I recently accidently damaged my htc one bottom speaker and its really quite annoying to listen to. I was wondering if there is anyway to disable one audio channel or using an equaliser change audio balance globally. All of the research I have done and all of the equalisers I have tried has yielded no results I am rooted, unlocked and s-off if it helps in anyway. Thanks

I think Viper4Android would be exactly what you're looking for.

martini1294 said:
Hi,
I recently accidently damaged my htc one bottom speaker and its really quite annoying to listen to. I was wondering if there is anyway to disable one audio channel or using an equaliser change audio balance globally. All of the research I have done and all of the equalisers I have tried has yielded no results I am rooted, unlocked and s-off if it helps in anyway. Thanks
Click to expand...
Click to collapse
all you need : MONO output sound
HTC one sounds basically with stereo outputs and speakers
so you need to convert/change the output from Stereo to Mono, you can look for any App to do this
or you can try Poweramp.apk , go to Tone/Vol and adjust the BALANCE to your correct side
hope this help you

Wouldn't mono still use both speakers? And I have heard of poweramp but wouldn't that only affect that app itself, not for example my OS, ringtone etc. I would just like to completely disable the bottom speaker if there is a way.
Thanks

martini1294 said:
Wouldn't mono still use both speakers? And I have heard of poweramp but wouldn't that only affect that app itself, not for example my OS, ringtone etc. I would just like to completely disable the bottom speaker if there is a way.
Thanks
Click to expand...
Click to collapse
when you change the Balancer to the (not-damaged) speaker, it will disable the damaged one
if you think you need to disable it without use Balancer app, forget it , you can do it if you can de-assembly your phone

Prophet16 said:
I think Viper4Android would be exactly what you're looking for.
Click to expand...
Click to collapse
I tried viper4android and i cann only find the option im looking for, for bluetooth and headphones only, not for the actual phone speakers. =(

martini1294 said:
I tried viper4android and i cann only find the option im looking for, for bluetooth and headphones only, not for the actual phone speakers. =(
Click to expand...
Click to collapse
Well there is an option to use one profile universally. So you could set up the Bluetooth profile to have one sided audio and then enable the option to use that profile as the only profile. And when you plugin your headphones you can turn it off.

Sound problem when calling solved by custom ROM?

My friend has a problem with his galaxy s4 active. His microphone and speaker work perfectly when testing with music and audio recording. But when calling someone the speaker is dead silent and the other person can't hear him. I saw a bunch of threads where they reheat the audio IC and so on. He is running android 5.0.1. Now my question is: is this a software problem and can it be fixed by flashing CM? Thanks for any and all replies.
Edit: If you're wondering I know how to flash custom ROMs and have a lot of experience doing that.

I have the same problem, no sound when call via telephone app. Videos and music are prefect to. The best is when I use WahtsApp and call to someone everything is ok. So I think hardware is ok but something is blocking standard telephone application. I reset my phone (wipe) and reload rom but the problem wasn't gone.
I'm still looking for any solution so maybe someone can help.
Tx

Samsung headphones are not working too.

Solution:
http://forum.xda-developers.com/gal...ute-person-t3169864/post62150085#post62150085
And post 7

ungrillao said:
Solution:
http://forum.xda-developers.com/gal...ute-person-t3169864/post62150085#post62150085
And post 7
Click to expand...
Click to collapse
Thanks for the reply I was thinking it is a software glitch considering sound recording still works.
Sent from my Xperia M2 using Tapatalk

Unstable Bluetooth bitrate

I have a serious problem with Bluetooth audio.
I have really good headphones, but they are quite old and there's no support for ldac or aptx (just sbc). However I'm coming from Huawei P20 Pro and I never had any problem with audio quality on that phone.
And what exactly I mean? When I'm listening the music I can hear occasional drops of audio bitrate. It's extremely annoying. And no, I'm not using different Bluetooth devices (but I was able to do this with Huawei which had older Bluetooth version [!]), everything about multiple output is disabled, that option in developer's menu is set to 1.6. I'm out of ideas and pretty disappointed that premium device like Note 9 have problems with basic functions like this.
Ps. It's not a problem with my device. Same thing is happening on my friend's Note 9.

connect headphone via Bluetooth then go to
developer mode enable it/Bluetooth audio codec/(select the code you needed)

At what volume do you listen via bluetooth?
I have the same issue with my car receiver and noticed that if i play it at max volume i experience that and if i play it at a slighty lower volume, one or two steps from max, the issue is gone (or so i hope) for now it seems it is resolved by lowering the volume from max, or it is fixed in CSC1
---------- Post added at 10:42 AM ---------- Previous post was at 10:06 AM ----------
Amit.A said:
connect headphone via Bluetooth then go to
developer mode enable it/Bluetooth audio codec/(select the code you needed)
Click to expand...
Click to collapse
How do you make it stay on the selected option? Regardless which option i select the moment i go back or out of developer options it goes back to SBC

u sure ure not streaming through some streaming app and not reading actuall media from internal storage?
I'd try local media and see how that behaves.

bober10113 said:
u sure ure not streaming through some streaming app and not reading actuall media from internal storage?
I'd try local media and see how that behaves.
Click to expand...
Click to collapse
I do not know about the OP but in my case regardles if it is a streaming service (deezer) local files (mp3) and sometimes with call audio, it does that.

_robojock_ said:
I do not know about the OP but in my case regardles if it is a streaming service (deezer) local files (mp3) and sometimes with call audio, it does that.
Click to expand...
Click to collapse
what build if android are you running?

bober10113 said:
what build if android are you running?
Click to expand...
Click to collapse
Devbase PIE CSC1 (It does it with all previous builds too.) I have also tried Dr. Ketan and other n9 roms same issue.

_robojock_ said:
Devbase PIE CSC1 (It does it with all previous builds too.) I have also tried Dr. Ketan and other n9 roms same issue.
Click to expand...
Click to collapse
im using viper audio and other audio mods.
not sure if its me that dosen't realise it but i dont think I've experienced any of this. i use only local media. i play it through power amp and set the audio output manually to high res output.

bober10113 said:
u sure ure not streaming through some streaming app and not reading actuall media from internal storage?
I'd try local media and see how that behaves.
Click to expand...
Click to collapse
No. I'm not using any streaming services. Just FLAC or 320kbps AAC files ripped directly from CD.
_robojock_ said:
At what volume do you listen via bluetooth?
I have the same issue with my car receiver and noticed that if i play it at max volume i experience that and if i play it at a slighty lower volume, one or two steps from max, the issue is gone
Click to expand...
Click to collapse
I'm not listening on max volume, but sometimes it's close (older or more niche music recorded and mastered properly).
Btw just tried listening on my dad's S8+ and it's the same, so Samsung generally has something broken with sbc codec which is rather disappointing.
Btw, I'm using European Exynos model.

That's probably why Samsung still includes the headphone jack with their phones. I don't use bluetooth that often, except in the car and I don't recall experiencing any issues with it. Maybe I don't pay attention to it, but I will this time and see.