Database Info

Buzzing and crackling noise from speaker

So I just got CM13 up and running, everything was fine until I opened Youtube and started playing a video. When the volume is low I hear a constant buzz (something like a static sound) and some crackling noises here and there (the sound gets a little distorted too). When I max the volume I can't really tell if it's still there or not. The material that's playing overpowers the buzzes. Also it's not happening only on youtube. I hear the same noises on every app that produces sound. I tried fiddling with the included EQ in CM but no luck. Is my speaker by any chance starting to break or what is happening? This and the glorious 1.5 SOT I get from a full charge make this phone better and better >_>... Yay!

Does it happen on stock?

Hmm... I don't really know. I only noticed it today so I can't give an answer.

If the problem occurs with a stock ROM, it could be a hardware issue.

So I flashed stock and the problem is still the same. Should I replace my speaker module? I found one here, but in the title it says it is for the D820 model (I have D821). In spite of this, judging from the part number (EAB62971502) and what it showed on Encompass it should be for D821. I don't know what to say. Are the modules compatible between D820 and D821?

I have the same problem, on every rom, no matter what media is playing. Replaced speaker, didin't change anything

@aciupapa So you say it could be something else besides the speaker? That doesn't sound very good at all...

ac.buftea said:
@aciupapa So you say it could be something else besides the speaker? That doesn't sound very good at all...
Click to expand...
Click to collapse
I think that it could be that some contact points on the USB flex cable (which is the part for connecting LCD, usb cable . mic and speaker) may be vroken or something :/

Won't be able to isolate the exact problem without spare parts.
Simplest solution may be to replace speaker and see what happens.

And about the part numbers and the compatibility thing I wrote previously what do you think?

I believe the parts are the same, the only difference between the 820 and 821 being the radio frequencies.

issues MTCD KGL, and investigation, noise, wifi, map audio, radio. other, screengloss

so planning to catch some of the commons issues I seen over the forums, and want to see where people managed to fix issues, and I will add my own from experience, I had read through the forums, and tried many of the suggestions:
this on Erisin KGL PX5 Unit for VW.
I had tried factory MCU firmware, Factory andriod system
then
latest MCU firmware Malaysk andriod system.
and while the unit improved. this did not have any effect on the following problems:
NOISE ISSUE
1- when unit isoff, no sound at all from speakers
2- when unit is on, but muted very low volume constant tune hissing sound.
3- slightly louder volume constant tune hissing sound when the unit is NOT muted (does not go up as volume in increased)
4- data like noise, (like old computer onboard audio, noise is relevant to how much processing is done), this does not go up as volume is increased
a) I had looked into lowering the aux input gain from factory menu, thinking it might be aux in being not connected causing some of the above
b) tried removing every single cable (apart from the harness that is powering the unit)
c) what I will try next, is to see if I can provide cleaner power to the unit, or improve the ground, I am not electrical engineer, so some advice is needed.
-----------------------------------------
"Here Maps" Audio skips milliseconds of speech.
so instead of saying "take the first exit at the next roundabout", it sounds like "take the fist exi at the nex rou bout"
I had tried downloading other voices, but the the problem persist.
I really have no idea why this is happening but will be nice to know how to solve it.
--------------------------------------------
dreaded wifi issue:
unit wifi is really bad although I literally parked next to the router, at my house, and there is only a window rather than a wall i between.
only remedy so far is to improve line of sight, however I read that improving the grounding, or getting better wifi antenna might solve the problem. so will give this a go later.
----------------------------------------------
Radio performance was appalling out of the box. so I purchased fakra radio adapter (powered)
this improve performance significantly, and now it picks up most of the radio channels.
still the radio is not as good as stock radio that came with the car.
as most channels have a bit of crackling sound, very few sound perfect.
----------------------------------------------
the screen is very reflective and barely visible in daylight, (I have light color leather seats) which makes the screen even worse.
so I am thinking of buying anti gloss screen filter.
I would think it will wash out the colors a bit, but I am willing to do that in order to see the screen properly.
as of night time, even when lowering brightness to min, its still bright, so I am thinking of getting something like Lux or automatic adjustment based on time (since the unit does not have ambient sensor)
------------------------------

2 months ago I had also a KGL / Erisin radio for VW with sound problems. You always heard a noise from the speakers. The Boise came from the AMP chip. Then i had a Ownice C500 that also Bad noise from the speakers. Now i have a Xtrons PX5 Unit and there is no noise. Additionally i have made an upgrade from TDA 7388 to Pioneer PA2030A, now the sound is perfect.

how did you upgrade the MOSFET?
are they pin compatible and you can desolder the old one and replace it with the new one?

zapedge said:
how did you upgrade the MOSFET?
are they pin compatible and you can desolder the old one and replace it with the new one?
Click to expand...
Click to collapse
Exactly. You can buy the AMP on eBay.

I've not audio issues, but for me radio reception is not so good, in particular the AF option works very bad!
Wifi performances are intermittent (I've a 4g wifi dongle; the signal comes and goes...) but when it goes, it downloads at full speed.
Screen is very reflective but lights are ok for me.
I have some problem with google maps app: it locks and I've to restart it 2 o 3 times... I don't know if it depends on the app or on the system.

mmmalas said:
"Here Maps" Audio skips milliseconds of speech.
so instead of saying "take the first exit at the next roundabout", it sounds like "take the fist exi at the nex rou bout"
------------------------------
Click to expand...
Click to collapse
I have the Erisin 6405V in my VW Golf mk5. All seems to be running fine, haven't noticed the wifi issues really as I mainly use a USB 3G Dongle I have connected.
For your navigation audio, goto Settings > Navigation Settings and change audio mode from switching to fixed(?) (basically the other option, I can't remember off the top of my head) I found this fixed my issue in google maps.
Also highly suggest to do all google play updates (maps/google app/play services) that's improved the stability of alot of the apps I use on my headunit.
I'm (I think) running their KGL_PX5_6.0(20170502) that erisin sent me to fix my bluetooth echo.
My -only- issue I'm finding. I had a previous headunit's I had tried and sent back for various reasons (xtrons and eonon) they detected my car doors open etc correctly but the erisin one doesnt seem to. Not that this is a problem, just wondering where the issue could be as the CanBus settings seem to be correct.

The hissing you hear is caused by the Wi-Fi. Turn off Wi-Fi and you will see that the noise is gone

turning off the wifi does not fix the issue.
as for mixing vs fixed mode in navigation audio, that did not make a difference.
I will open the unit soon to upgrade the amp, and maybe dampen the noise with a help with an electrical engineer

Ati_gangster said:
2 months ago I had also a KGL / Erisin radio for VW with sound problems. You always heard a noise from the speakers. The Boise came from the AMP chip. Then i had a Ownice C500 that also Bad noise from the speakers. Now i have a Xtrons PX5 Unit and there is no noise. Additionally i have made an upgrade from TDA 7388 to Pioneer PA2030A, now the sound is perfect.
Click to expand...
Click to collapse
I also have the noise, this is my second head unit, I had to return the old one due to issues with the buttons... Is swapping the mosfets very complicated? I am comfortable with soldering irons, have used it for other works... Do you have any pictures of the work done?
Thanks

zapedge said:
how did you upgrade the MOSFET?
are they pin compatible and you can desolder the old one and replace it with the new one?
Click to expand...
Click to collapse
It is not easy but possible.
Look at this thread, there are some photos.
http://forum.carjoying.com/thread-4...ar-view-camera-problem-changing-tda-7388.html
Good luck

j0nnymoe said:
I have the Erisin 6405V in my VW Golf mk5. All seems to be running fine, haven't noticed the wifi issues really as I mainly use a USB 3G Dongle I have connected.
For your navigation audio, goto Settings > Navigation Settings and change audio mode from switching to fixed(?) (basically the other option, I can't remember off the top of my head) I found this fixed my issue in google maps.
Also highly suggest to do all google play updates (maps/google app/play services) that's improved the stability of alot of the apps I use on my headunit.
I'm (I think) running their KGL_PX5_6.0(20170502) that erisin sent me to fix my bluetooth echo.
My -only- issue I'm finding. I had a previous headunit's I had tried and sent back for various reasons (xtrons and eonon) they detected my car doors open etc correctly but the erisin one doesnt seem to. Not that this is a problem, just wondering where the issue could be as the CanBus settings seem to be correct.
Click to expand...
Click to collapse
Hi, can you share the link to the Firmware ERISIN sent you? how did you contact them?
thanks in advance

mmmalas said:
so planning to catch some of the commons issues I seen over the forums, and want to see where people managed to fix issues, and I will add my own from experience, I had read through the forums, and tried many of the suggestions:
this on Erisin KGL PX5 Unit for VW.
I had tried factory MCU firmware, Factory andriod system
then
latest MCU firmware Malaysk andriod system.
and while the unit improved. this did not have any effect on the following problems:
NOISE ISSUE
1- when unit isoff, no sound at all from speakers
2- when unit is on, but muted very low volume constant tune hissing sound.
3- slightly louder volume constant tune hissing sound when the unit is NOT muted (does not go up as volume in increased)
4- data like noise, (like old computer onboard audio, noise is relevant to how much processing is done), this does not go up as volume is increased
a) I had looked into lowering the aux input gain from factory menu, thinking it might be aux in being not connected causing some of the above
b) tried removing every single cable (apart from the harness that is powering the unit)
c) what I will try next, is to see if I can provide cleaner power to the unit, or improve the ground, I am not electrical engineer, so some advice is needed.
-----------------------------------------
"Here Maps" Audio skips milliseconds of speech.
so instead of saying "take the first exit at the next roundabout", it sounds like "take the fist exi at the nex rou bout"
I had tried downloading other voices, but the the problem persist.
I really have no idea why this is happening but will be nice to know how to solve it.
--------------------------------------------
dreaded wifi issue:
unit wifi is really bad although I literally parked next to the router, at my house, and there is only a window rather than a wall i between.
only remedy so far is to improve line of sight, however I read that improving the grounding, or getting better wifi antenna might solve the problem. so will give this a go later.
----------------------------------------------
Radio performance was appalling out of the box. so I purchased fakra radio adapter (powered)
this improve performance significantly, and now it picks up most of the radio channels.
still the radio is not as good as stock radio that came with the car.
as most channels have a bit of crackling sound, very few sound perfect.
----------------------------------------------
the screen is very reflective and barely visible in daylight, (I have light color leather seats) which makes the screen even worse.
so I am thinking of buying anti gloss screen filter.
I would think it will wash out the colors a bit, but I am willing to do that in order to see the screen properly.
as of night time, even when lowering brightness to min, its still bright, so I am thinking of getting something like Lux or automatic adjustment based on time (since the unit does not have ambient sensor)
------------------------------
Click to expand...
Click to collapse
zapedge said:
Hi, can you share the link to the Firmware ERISIN sent you? how did you contact them?
thanks in advance
Click to expand...
Click to collapse
Here is the link: https://workupload.com/archive/49a8wjT
I contacted them via email.

I had took my unit to hardware lab, and powered it, and connected it to oscliscope.
it seems that there is 25khz noise on the speaker output all the time.
I had tested also pre amp output, and that have some noise too. so my guess is that good amp would cut off those high frequencies, and thats why it sounds better.
I will try to use ferrite cores, and see if it improve the situation, although I think it will not be able to cut low frequencies, but it never hurts to try espacilly this means no need to open the unit. I will report back later
j0nnymoe, can you tell us the MCU version for your unit after the update. thanks

Did you try 2.47 MCU? That's the latest for MTCD KGL PX3/PX5.
I have experienced noise issue #4 when I am using WiFi hotspot from my phone and phone is next to the unit.

mmmalas said:
I had took my unit to hardware lab, and powered it, and connected it to oscliscope.
it seems that there is 25khz noise on the speaker output all the time.
I had tested also pre amp output, and that have some noise too. so my guess is that good amp would cut off those high frequencies, and thats why it sounds better.
I will try to use ferrite cores, and see if it improve the situation, although I think it will not be able to cut low frequencies, but it never hurts to try espacilly this means no need to open the unit. I will report back later
j0nnymoe, can you tell us the MCU version for your unit after the update. thanks
Click to expand...
Click to collapse
This noise is so annoying, it makes me miss my OEM head unit, my car has an OEM Bose sound system with an amplifier under the seat and a subwoofer in the spare wheel, I don't know if this might be the issue for me, the subwoofer and all 8 speakers certainly work, as soon as I mute the head unit, the noise is gone, as soon as I step it up to Vol 1, I xan hear the noise, when the music or radio is playing, I can't really hear it but if the volume is up and it comes to the end of the song, I can hear it and it's bugging me... I don't know of replacing the AMP chip with a Pioneer chip (As mentioned before) would be the ultimate solution to get rid of that noise...
The other problem I am facing is the brightness of the screen in daylight, I have a Dasaita V600 (Specific to my 2012 Mazda3), I barely can see anything during the daytime, the brightness is cranked up to the max, are there any other settings to play around with? Contrast maybe etc...
Sent from my SM-N910F using Tapatalk

Sassokee said:
The other problem I am facing is the brightness of the screen in daylight, I have a Dasaita V600 (Specific to my 2012 Mazda3), I barely can see anything during the daytime, the brightness is cranked up to the max, are there any other settings to play around with? Contrast maybe etc...
Click to expand...
Click to collapse
Disable in Factory Settings brightness control by headlamp, it's something like that, but it made my screen brighter during the day.

stefcio007 said:
Disable in Factory Settings brightness control by headlamp, it's something like that, but it made my screen brighter during the day.
Click to expand...
Click to collapse
Thank you for the advice, I will try this later and​ report back.
Sent from my SM-N910F using Tapatalk

opened the unit today, nothing obvoius of whats wrong.
I noticed that the wifi antenna connected to realteck chip that claims antenna diversity, however the second antenna does not exist.
as for the car amp, still looking into the problem cause, might start digging into the pcb further to see where its going wrong.

Sassokee said:
This noise is so annoying, it makes me miss my OEM head unit, my car has an OEM Bose sound system with an amplifier under the seat and a subwoofer in the spare wheel, I don't know if this might be the issue for me, the subwoofer and all 8 speakers certainly work, as soon as I mute the head unit, the noise is gone, as soon as I step it up to Vol 1, I xan hear the noise, when the music or radio is playing, I can't really hear it but if the volume is up and it comes to the end of the song, I can hear it and it's bugging me... I don't know of replacing the AMP chip with a Pioneer chip (As mentioned before) would be the ultimate solution to get rid of that noise...
The other problem I am facing is the brightness of the screen in daylight, I have a Dasaita V600 (Specific to my 2012 Mazda3), I barely can see anything during the daytime, the brightness is cranked up to the max, are there any other settings to play around with? Contrast maybe etc...
Sent from my SM-N910F using Tapatalk
Click to expand...
Click to collapse
I have almost the same issues with the same unit for my Mazda 6 2015.
1. frustrating with the noise at low volume.
2. poor quality of WIFI signal (I'm sending my internet via mifi router)
3. poor quality of bluetooth phone calls.

i had wifi problems with my eonon ga6200f (kld-mtcd) just would not connect at all logged into my router and manually set the channel to channel 3 and its been fine since connects every time now.
i also have a problem with background sound when unit is not playing anything i have an infinity amp so im running through a spdif box from front left and right speakers so figured thats what the problem was been trying to find out if any of the pins not laid out in the manual are spdif out but not getting very far with seller or eonon

Bluetooth Audio issues

Ladies and Gentlemen,
I am having the oddest issue with my phone. The u11 is 99% amazing, to me. I really like everything about it......
-except-
When paired to my 2013 Dodge Dart (don't ask. big mistake) the music audio plays slow. I don't mean the speed of reaction as far as switching tracks or how long it takes to play the next song... I mean it sounds like the audio is pitched down by about 20%.
Things I know/Have Tried from a troubleshooting perspective..
The phone bluetooth audio works fine.
The audio, when connected to the aux jack, works fine.
The audio, when connected to OTHER bluetooth devices such as my HK Aura plays fine.
My phone and car are updated to the latest firmware.
I realize that the conclusion is going to be "it's your car dude".... but since it's not so easy to get rid of the car... and I don't really want to swap this phone out for a Galaxy......
Is anyone else experiencing this? Has anyone had this and sourced a solution?
Thanks.

I've used my U11 in my 2013 Dodge Grand Caravan (don't ask. big family) and it performed flawlessly.
I imagine they are on similar systems, mine is just the standard UConnect head unit. This happens will all media streaming?

riggsandroid said:
I've used my U11 in my 2013 Dodge Grand Caravan (don't ask. big family) and it performed flawlessly.
I imagine they are on similar systems, mine is just the standard UConnect head unit. This happens will all media streaming?
Click to expand...
Click to collapse
Yes standard head unit. strictly an LED display with knobs.
Yes. It's across the board.
Google Play
Pandora
Tidal
Netflix (it's trippy to watch the video move at regular speed while the vocals are not only behind, but pitched down!)
I've also tried varying bit rates on my personal MP3s.
I have a hunch that this has to do with the audio in the phone being 24bit and the radio converting to 16 bit, but I have nothing to base that on...

Basic suggestion - unpair and re-pair to see if that resets something.

I've connected my u11 to two different cars so far (an Infiniti and a Land Rover), and haven't had that issue.
I've also connected to a plethora of BT speakers, with no issue....

It is probably your car. To be honest, I think it's a UConnect issue that doesn't play nice with HTC phones. My HTC 10 had basically same issue I'm having now where music sounds like garbage, distorted. The U11 is even worse! I believe my head unit is the RHB model in a 2011 Ram. But 2 phones now with same issues, can't be coincidence.
Sent from my 2PZC5 using Tapatalk

davidtm0 said:
Basic suggestion - unpair and re-pair to see if that resets something.
Click to expand...
Click to collapse
The classic, of course.
I did pair and unpair a few times even going so far as to to completely reset the car radio from any pairings.
no luck, but thank you for the suggestion.

mbaseball3 said:
It is probably your car. To be honest, I think it's a UConnect issue that doesn't play nice with HTC phones. My HTC 10 had basically same issue I'm having now where music sounds like garbage, distorted. The U11 is even worse! I believe my head unit is the RHB model in a 2011 Ram. But 2 phones now with same issues, can't be coincidence.
Sent from my 2PZC5 using Tapatalk
Click to expand...
Click to collapse
yeah, based on everything else I've done. It is most likely the car. Unfortunately I use that feature way too much to over look it...
Thanks for the input.

I have yet to test my wife's Samsung s8 to see if the issue carries. Not a good test though since the s8 has Bluetooth 5.0 but it's all I've got ha!
Sent from my 2PZC5 using Tapatalk

I have a similar issue, my U11 stutters and warbles and is generally unlistenable when using my tunelink (for android). However, when playing music through my Bluetooth headphones it plays perfectly, when playing through my Bluetooth speaker it plays perfectly and finally when playing through my Bluetooth headset it plays perfectly. Tried on my sisters car stereo and it plays perfectly. Its just the tunelink that has a problem. Tried a S8 and it plays perfectly through the tunelink, as does my 10 and my M8.
Edit:
Have bought another adapter to test and this also connects and plays perfectly with my U11. I guess it's just a compatibility thing with the tunelink.

Hey I have the same problem in my U11 and 2012 Dodge Challenger (ask, I love this Car!!)
The only solution I have found is if a restart the app on the phone then the playback is good. but I do wish i could just connect it and it would the playback would run fine like my old HTC M9.

Just to add to the thread. My u11 is slow to connect to my 2014 pilot and 2012 infiniti. Why it does connect it always disconnects. I'm on us unlocked 1.16 firmware.
I've read there is issues with Android 7.1.1 and 7.1.2 is better but searching the internet it does not seem the issue is too wide spread.
Edit. Testing with Wi-Fi on, not connected. So far so good

I have similar issues. I have a Subaru Outback (2015) and while my previous phone (Nexus 5) and my kids' iPhones all sound fine, the U11 sounds terrible when connected via BT. It is very grainy, like a sample rate mismatch. Same result in all audio apps. The U11 sounds find when connected to my Bose BT headphones. It's just some weird incompatibility with the car. Extremely frustrating. Its 2017 people!!

Digtal high clipping noise with A2DP Bluetooth

Hey guys..
after some weeks of use of my new car stereo i just found out that the music streamed with the A2DP app is clipping in high frequencies.
I have an Erisin 5060 with PX5 Chip. It is the same with stock rom and Malaysk rom. I just use Viper4Android to make the sound a little better...
Anyone have the same issue and could explain me if it is Android related or is our hardware chip only crappy?
I just searched for any solution but i didnt found anything.
Thanks in advance

i believe this problem persists across all platforms (px3&px5).
i've been searching solution for months. couldn't find one. the problem related with bluetooth bitpool.

megamefta said:
i believe this problem persists across all platforms (px3&px5).
i've been searching solution for months. couldn't find one. the problem related with bluetooth bitpool.
Click to expand...
Click to collapse
hardware or software ?

Software..

kl
megamefta said:
Software..
Click to expand...
Click to collapse
but maybe some ideas about how to fix it? Maybe @Hal9k_ can try do something ?

It has to be the software because other music is clear only with Bluetooth its crap
Gesendet von meinem SM-G935F mit Tapatalk

Any update on a fix for this? it seems like it is a very common issue? I bought this headunit for the purpose of Bluetooth streaming but the quality is horrible.

No dev's for try do something. I think only @f1x can take a look for solution.

I have this issue with my PXE XRC unit. Anyone ever fixed this?

I'm not sure if its the same problem.
I have a PX5 Android 6 unit and it works fine with my Pixel2XL.
However on my friend's iPhoneX, there is high frequency distortion. Perhaps if ya guys can state what phones you using, we can identify a trend...

MasK said:
I'm not sure if its the same problem.
I have a PX5 Android 6 unit and it works fine with my Pixel2XL.
However on my friend's iPhoneX, there is high frequency distortion. Perhaps if ya guys can state what phones you using, we can identify a trend...
Click to expand...
Click to collapse
I have a Iphone 7 plus. But I also connected an android tablet and used that to stream audio, same results.
---------- Post added at 09:42 PM ---------- Previous post was at 09:13 PM ----------
I just took the unit out of my car and booted it on the bench. Hooked up the RCA connections and ran bluetooth a2dp streaming over the RCA connectors (assuming that bypasses the internal amplifier). It still sounds like crap. So the internal amplifier isnt the issue.

sev said:
I have a Iphone 7 plus. But I also connected an android tablet and used that to stream audio, same results.
---------- Post added at 09:42 PM ---------- Previous post was at 09:13 PM ----------
I just took the unit out of my car and booted it on the bench. Hooked up the RCA connections and ran bluetooth a2dp streaming over the RCA connectors (assuming that bypasses the internal amplifier). It still sounds like crap. So the internal amplifier isnt the issue.
Click to expand...
Click to collapse
Oh yes, that's for sure. It's not the internal amp nor DAC issue. My setup is also via RCA. This is a BT issue.
I was hoping updating the MCU and OS would help (looking at all the BT fixes in the release notes).. but this is sadly not the case.
Sent from my Pixel 2 XL using Tapatalk

nope. I tried MCU and I also tried OS updates. None of that helps. Is your unit using the md-725 module?
I also just took my unit apart to do the 7thfloor mod, but my XRC based unit doesnt have the WM8731S.. That is strange, I thought all Hui Feng type units had it.
More data points. My unit has the MD725 bluetooth. There's issues with the md-725 not working with google now, or other android apps with the mic. Mine does NOT have that problem. My MIC works with android apps.
I regret buying this unit.

Mine is this:
https://www.aliexpress.com/item/Das...963.html?spm=a2g0s.9042311.0.0.27424c4dQbjvdu
Honestly, not aware of what BT chip it's using. This BT issue isnt my main problem with the set as it works fine with my phone.
There are other DAC related issues which I'm trying to sort out..

oh i thought your issues are with BT. This thread's title says BT... Mine sounds perfectly everywhere else besides BT music

Oneplus 6, 8GB 256GB ROM, OOS 9.0.2 (stable) - Bluetooth Issues?

Hello people,
I am using my Oneplus 6 since day one as (more or less) heavy user (kinda IT-Admin stuff, bit gaming, etc.) and I'm absolutely stunned by that phone, I'm always on the latest OP-Device since day one.
So... but I'm now struggleling with the Bluetooth Connection with my Headphones. I am using my Beyerdynamic Amiron Wireless with my Oneplus6 via Bluetooth.
Now the thing is - sometimes if I turn my head around, the connection is getting unstable and I can't enjoy my music. With my 6€ amazon Bluetooth dongle on my working-PC I am not experiencing this problem, even if I walk through the office here (+/- 5-10 meter), totally stable, not getting unstable. But if I am underway before or after work, or in the city - I am experiencing this issue with my headphones.
I already made a full reset (factory reset) and flashed the latest OOS 9.0.2 with the unbrick tool, just to exclude it could be an buggy update or something. I even made a whole reset of the headphones (and checked for newer firmware, but there wasn't one).
Have anyone of you any ideas about this? F***s me up right now...
I am unrooted, no magisk or any mods.
Cheers

Hi, I'm using the Sennheiser HD1 free, and the only problem i have is on PUBG i have a little bit of latency , even if they are aptx compatible, i'm on the last stable 9.0.02 and i have a 128/8 variant, but with music, videos or calls they are perfect, you tried to factory reset and debrick so i guess i have nothing to advice you for
good luck

Chinaroad said:
Hi, I'm using the Sennheiser HD1 free
Click to expand...
Click to collapse
They don't support Apt-X Low Latency

davfiala said:
They don't support Apt-X Low Latency
Click to expand...
Click to collapse
When i connect it, it shows a toast and a logo of Qualcomm aptx
And also
from :https://www.theverge.com/circuitbre...s-on-impressions-comparison-bluetooth-earbuds
"The Momentum HD1 Free and CX 6.00 BT look virtually identical. The hardware for the cables, the in-line remote on the right earbud, the battery module on the left earbud, are all exactly the same — the two products even share the same FCC ID. Both headphones have Bluetooth 4.2 and support Qualcomm aptX and aptX Low Latency audio for higher quality playback, assuming your device supports it, which makes sense seeing as, again, they’re more or less the same."

I'm not test it yet with bluetooth headphones, but i don't have any bluetooth problem with my car audio and galaxy watch. OnePlus 6 8/256GB A6000

I have 8/256, am on 9.02. See frequent disconnection during calls made via car's BT. Not that it should matter but I have 2018 MB E350. No BT problem making calls with my wife's Samsung S9+. I did not have any issues with OP6 when I was on Oreo. Tried factory reset, clean flash, all the steps OP mentioned.

I'm on the 8gb/128gb not the 256gb and I have to issues whatsoever. I'm using Sony MDR-XB650BT headphones which are aptx compatible and an Mpow Bluetooth receiver (3.5mm Jack) my 2011 Pathfinder Bluetooth and my Samsung gear SEE frontier... all without any issues or drop outs.
I'm on 9.02 rooted with Magisk 17.1 stable with TWRP blue spark v986 v2 and EX kernel 3.02

I have the same issue and I believe it has to be because of low quality headphones, not the phone itself. Thought my nexus 6P was the problem but the issue remained on my new op6.
So get better quality headphones or it won't go away unfortunately

BunnyPig said:
I have the same issue and I believe it has to be because of low quality headphones, not the phone itself. Thought my nexus 6P was the problem but the issue remained on my new op6.
So get better quality headphones or it won't go away unfortunately
Click to expand...
Click to collapse
Beyerdynamic Amiron are not even close to low quality. That being said i am having the same problem with some low quality headphones and just assumed it was them.
But I am also having a problem getting any changes i make to bluetooth in developers options to stick. So not really sure what to think.

nujackk said:
Beyerdynamic Amiron are not even close to low quality. That being said i am having the same problem with some low quality headphones and just assumed it was them.
But I am also having a problem getting any changes i make to bluetooth in developers options to stick. So not really sure what to think.
Click to expand...
Click to collapse
Didn't see what kind of headphones he was using, my bad.
But I still highly doubt it has anything to do with the phone anyway, since everything (at least what I use bluetooth for) else is working extremely well, just my low quality headphones has issues.
And at least from my side, since the issue remains from two totally different phones I think it's something else. If it's not hardware related to the headphones then my best bet is some kind of settings inside android.

nujackk said:
Beyerdynamic Amiron are not even close to low quality. That being said i am having the same problem with some low quality headphones and just assumed it was them.
But I am also having a problem getting any changes i make to bluetooth in developers options to stick. So not really sure what to think.
Click to expand...
Click to collapse
I changed too the settings of the dev option but none of them seemed to get saved, try the OB rom or another rom to see if it's the stable one is the main cause

OP6/8/256 + 9.0.2 + cheap no name BT resembling Crapple earphones.
Stable connection but 600ms latency, exactly as under 8.1, 9.0, 9.0.1 stock.
Sometimes volume skyrockets and requires adjustment.

Gr8man001 said:
I have 8/256, am on 9.02. See frequent disconnection during calls made via car's BT. Not that it should matter but I have 2018 MB E350. No BT problem making calls with my wife's Samsung S9+. I did not have any issues with OP6 when I was on Oreo. Tried factory reset, clean flash, all the steps OP mentioned.
Click to expand...
Click to collapse
There's no such car as "2018 MB E350." They discontinued E350 in 2016.
Are you sure that you don't have a time machine?

nabbed said:
There's no such car as "2018 MB E350." They discontinued E350 in 2016.
Are you sure that you don't have a time machine?
Click to expand...
Click to collapse
LOL! It's E450. I still have 2015 E350- my son is using it (just turned 16, so only during the day with my wife in the car with him). Actually, BT disconnecting issue I mentioned happens in both cars. I may ask the service folks to look into this issue when I take my car for service next month. It does not happen all the time but get disconnected while I am still talking and have good signal.

OnePlus 6 w/ 9.0.2 - has been factory reset by clearing data and cache in recovery, as well as factory reset within Android.
My issue is with my vehicle's Bluetooth. Media playback is fine, however the vehicle often thinks that the phone has no signal, when it does have signal. When the vehicle does that, I can't make calls from the vehicle, but making or receiving a call on the phone itself will work through the vehicles speakers and mic.
No issues with my iPhone, or any other Android I've used. This is the first and only phone with this problem.