Database Develop

Add aptX, can anyone help?

Hi ladies & gentlemen, especially technical gurus,
Does anyone know how to add aptX for our SGT? I list some ideas, including "ridiculous" ideas, at least give you guys a good laugh.
What is aptX?
http://www.csr.com/products/60/aptx
Proof of aptX is better than SBC on electro-acoustic measurement in full digital domain --> http://www.prismsound.com/test_measure/webinars.php?wid=19
Download the 140MB video webinar. Really good. Thanks to Simon WOOLLARD of Prism Sound. Great organization, Great webinar Simon !!! KUDOS !!!
a xda member managed to find the log cat of aptX running in android phone
http://forum.xda-developers.com/showthread.php?t=1917962
So, choice of convenience / solution or by ranking of convenience: -
flash aptX codec into existing BT chip within Android phone. Requires purely software only. Does anyone have these software pacakges, tool, aptx codec? Mind me, aptX is a licence and needs to be paid, but surely CSR will not be collecting individually. Who am I to them
flash aptX codec directly into BT chip on phone PCBA. Requires software as above and needs to open up phone and hardwire direct to BT linkage. Can anyone do this?
Buy a 3.5mm stereo jack to BT aptX transmitter, choice of: -
http://www.jaybirdstore.com/s.nl/it.A/id.236/.f?sc=2&category=101 clearly shows aptX on the casing.
http://www.cndgroup.com.hk/e/product/product_detail.asp?sku=2127
but the chinese site doesn't says aptX at all http://www.woowi.com/product/201208/16.html#
Finally, unsolder out the Jaybird aptX chip and resolder into SGT and remove the old chip. Must be same PIN-OUT, manufacturer, type, etc. Kernel, OS, driver must support & match. Else doesn't work.
SGT individual PARTS breakdown, diagram,
http://originalspareparts.com.ua/phones/samsung/p1000_galaxy_tab#s
BT chip is U202 1205-004045 - IC-BLUETOOTH
How about aptX LOSSLESS ?? http://www.csr.com/products/technology/aptX ??? pls click the lossless link. Does it mean currently on the market all are normal aptX and not LOSSLESS type?? the expensive type??
Just in case someone is interested, here's a forum chat with someone from aptX
http://www.hydrogenaudio.org/forums/index.php?showtopic=78217
So, let the ridiculous CHAT beginssssssssssssssssssssssssss.

Well, incase you like such stories, aptX was bought by CSR 2010 Q3, http://www.google.com.hk/search?hl=...252.1707.0j10j2.12.0...0.0...1c.1.rfb882TLcA4
then 2012 Q3 Samsung bought the bluetooth division of CSR, of just the aptX division of CSR, well "mobile business" they call it, not the entire CSR anyway. http://www.google.com.hk/search?q=c...sugexp=chrome,mod=13&sourceid=chrome&ie=UTF-8

I tested one of the aptX combinations,
phone is S3 HK, rom is still original 4.1 I think, virgin, no root.
headphone is Denon AH-W200.
music player is default from S3. EQ setting is flat, nothing else engaged.
Other settings unknown, it's not my phone, not intruding to borrowers privacy, didn't manage to check other software settings.
Wired sound is termed as "MIDDLE, or normal". We are not reviewing AH-W200, we are just comparing between aptX vs. wired, vs. normal BT.
listening test (subjective), wired versus BT (assuming aptX is default engaged, as says by CSR)
During BT (assuming aptX is engaged), the bass is overloaded, not yet full distortion, not even slight distortion, just a good 10dB more than wired.
mids and highs are nearly as good as wired. Some moments can hear high frequency loosing out, but most of the time, ??? 80% or 90% is nearly as good as wired, if I did a blind test, probably I would know, but some moments it's just obvious lost of highs like old BT in SBC mode.
Should have borrowed the AW-H100 as well which is all same supposingly, except without aptX.
Anyway,
BT SBC vs. BT aptX
Obvious difference, BT SBC lost of bass even to wired, lost of highs is significant. Midrange clarity suffer some, but unknown if not perform a immediate swap A B test.
BT SBC was from P1000, rom alroger's 4.1.2, xing player apk, DSP manager all flat, WM8994 in all default settings, direct DAC, Hi-Fi playback.
Headphone is AW-H200
Verdict = aptX has significant improvement over SBC, I'm a believer now, but am not satisfied with the +10dB bass boost. Was it Denon's engineer liked bass so much added a EQ setting when aptX engaged?
Who know????

Audio Out via USB, alternative solutions?

Hi,
I got used to Samsungs CarDock mode which allowed to charge the phone and play music through USB port directly to my car stereo (no BT,:crying: ). I used the iBolt XProDock ( here ) which is amazing.
Now I have the M8 and figured out that analog output is not on board. So I am looking for a solution:
a) A BT-receiver for my car audio, optimally charged with max 5.0 V via USB plug)
b) Any digital to analog converter (dac?), but not too much gadgets to be supplied with power and cables
c) A second earphone-cable ?
d) A software solution to get analog sound from USB?
Any suggestions?

http://www.accessorypower.com/gogroove-flexsmart-x3-p-2410.html
BT FM Transmitter it also charges phones at 1A

If you have an AUX input, get a stereoclip.. Uses APT-x codec for cd+ quality sound. Lasts about 6 hours on a charge.
http://www.amazon.com/HTC-Bluetooth...qid=1396896640&sr=8-1&keywords=htc+stereoclip

APT-X Bluetooth codec actually sounds better than USB analog audio output. No engine noise or light clicks/background noise going on.
And it's a much higher quality than normal Bluetooth.
BUT, some apps are not yet APT-X friendly.
Utter being one of them if I remember correct.

Taknarosh said:
http://www.accessorypower.com/gogroove-flexsmart-x3-p-2410.html
BT FM Transmitter it also charges phones at 1A
Click to expand...
Click to collapse
Looks cool, but needs a car power outlet which I don't want to block with this gadget. Since I use a plantronics BT-heaset for calls no handsfree functionality is required. But thnx for this!

regalpimpin said:
If you have an AUX input, get a stereoclip.. Uses APT-x codec for cd+ quality sound. Lasts about 6 hours on a charge.
http://www.amazon.com/HTC-Bluetooth...qid=1396896640&sr=8-1&keywords=htc+stereoclip
Click to expand...
Click to collapse
Found that already, but some people seem to have issues with that. Must check myself, thnx

CZ Eddie said:
APT-X Bluetooth codec actually sounds better than USB analog audio output. No engine noise or light clicks/background noise going on.
And it's a much higher quality than normal Bluetooth.
BUT, some apps are not yet APT-X friendly.
Utter being one of them if I remember correct.
Click to expand...
Click to collapse
Sorry, how could that affect the idea of APT-X in my car? The One M8 works with APT-X, and when the BT-receiver also does, shouldn't any music player work fine? I use Player Pro, and this app works fine over regular BT. Is there a difference with APT-X?

charly-whiskey said:
Sorry, how could that affect the idea of APT-X in my car? The One M8 works with APT-X, and when the BT-receiver also does, shouldn't any music player work fine? I use Player Pro, and this app works fine over regular BT. Is there a difference with APT-X?
Click to expand...
Click to collapse
Like I said, "some apps".
Yes, APT-X is handled differently somehow.
All music players I've tried have worked just fine though.
I think it's more "voice controlled" bluetooth related apps that sometimes have problems.

CZ Eddie said:
Like I said, "some apps".
Yes, APT-X is handled differently somehow.
All music players I've tried have worked just fine though.
I think it's more "voice controlled" bluetooth related apps that sometimes have problems.
Click to expand...
Click to collapse
ok, nothing that botheres me.
I will try the BT-Solution.
Update 15.04.2014:
I bought a tiny BT-Receiver / (even with transmitter, which I don't need), here.
Works like a charme. Thnx for your advice!

Apt-x
APT-X cannot be used with just any device. In order to get full potential from apt-X you need to have AAC audio files which the HTC one m8 support and will give you much better sound then mp3. Also APT-X can only be used if the speakers support apt-X as well as the phone. If your phone supports apt-X but your speaker or stereo does not then the APT-X will not work. There are only a handful of speakers and stereos that support APT-X. But like I said APT-X supports audio at a higher bit-rate, then standard Bluetooth, and higher then a docked iPod. For good audio performance you need both a phone/player, and speaker/stereo that support APT-X on both ends, and you might want to load some songs from a CD in AAC format onto your computer to give you that CD quality sound, or buy some songs from HDtracks.com , to play using APT-X. But also the HTC one M8 should have gotten the lollipop 5.1 update which supports usb audio/host. So I would check and see if you have lollipop 5.1

[Q] New at Android Auto - poor bluetooth quality?

Hello everyone!
So last weekend I finally received this: LINK (EBAY)
I am totally new at Android Auto, though I have had several Andrioid Phones, as well as an Android tablet. Now I have an iPhone SE - so yes, I turned to the dark side. Not important here and now.
My question is - When I had both phone and tablet with android, I remember the many many possibilities I had with rooting etc. What do I have with my Radio? Can I root it? Can it be even better?
The only negative thing I have to say, is that the sound quality via bluetooth is quite poor - especially in the higher notes. The bass however, is still awesome on bluetooth. The sound quality is only bad on bluetooth - which tells me there is something wrong with the bluetooth hardware og the bluetooth software. Very sad to find out - I listen to bluetooth music 90% of the time. That issue let me to thinking: Is there a way to fix it? Maybe a root or something?
Also - are there some must-have-apps I should know about?
Looking forward to hear from you.
Thanks.

I have noticed the same, however it is not related to Bluetooth, the BT quality is fine, the sound quality problem begins when Android Auto is activated. Try using Spotify with the standard BT connectivity. Then test the same song with the USB cable connected and using AA. The sound quality is fully degraded when using AA compared to the BT quality. I Use Viper4Android and the drop in quality is even bigger since Viper4Android doesn't catch the sound stream.
Any idea out there?
By the way, I'd rename the subject of this thread since the sound quality problem is not related to Bluetooth but with Android Auto.

Same, don't think there's a way around it.
https://productforums.google.com/forum/m/#!topic/android-auto/1OVZA4SUG-g
Second comment on that article, has to do with digital vs analog and our built in equalizer. You'd think digital would sound better

sushi143 said:
Same, don't think there's a way around it.
https://productforums.google.com/forum/m/#!topic/android-auto/1OVZA4SUG-g
Second comment on that article, has to do with digital vs analog and our built in equalizer. You'd think digital would sound better
Click to expand...
Click to collapse
BT is also a digital stream and sound is excellent, even more when paired with Viper4Android. Nonetheless V4A doesn't seem to catch the digital output stream used by AA.

Maybe it's just usb? My thumb drive doesn't sound as good as my Bluetooth with the same song either.

Yea, audio is transmitted via USB, so in theory the quality should be even better since it is transmitted without the SBC compression like with BT (unless you have aptx). If your in-car has a built in equalizer i would advice to use that one

ktwo said:
Yea, audio is transmitted via USB, so in theory the quality should be even better since it is transmitted without the SBC compression like with BT (unless you have aptx). If your in-car has a built in equalizer i would advice to use that one
Click to expand...
Click to collapse
The theory is not working in this case, most probably because we don't know the root cause of this weird and annoying issue.
Car equalizer is not working when there are missing frequencies. BT works perfectly, but when playing the same song, with the same device and app (Spotify, music player, TuneIn) the quality is severely degraded when using AA. No deep bass and no treble. Total loss of both ends of the audible spectrum while BT quality is superb (compared to the crappy AA quality)
I have tested this issue with a Chevy Malibu 2017, Chevy Impala 2017, Ford Fusion 2018, Buick regal 2017 and Hyundai Sonata 2018. Same degradation when using AA with different head units, different apps, Axon 7. I hardly believe it is a device issue, I believe it is a problem with the protocol. Are you experiencing this issue? I am using RR ROM.

Oreo poor sound quality / Bluetooth

Hi,
I updated my P10 to Oreo yesterday and I have a big problem. Sound quality on Bluetooth headphones is veeeery low. I'm using Spotify (premium if that's matter). Anybody have this problem? Or maybe a solution.

That's gotta be disappointing! Sorry for your trouble. Do you know if your headphones have bluetooth aptx?
AFAIK, the p10 has bluetooth aptx (https://www.aptx.com/products/huawei-p10) which should result in decent sound quality when paired with aptx compatible bluetooth headphones and speakers. My own very subjective tests comparing my p10 plus vs my non-aptx tablet when paired with a Marshall Woburn speaker supports this claim but I'm still running nouget. I wonder if the aptx is still active in Oreo?

I tried to change a bluetooth codec in developer settings but it's not working so I guess my headphones supports only SBC codec :/

The issue seems to stem from audio Codecs resetting. I have similar troubles with the Mate 9 where the audio is terrible unless I go into the developer options WHILE music is playing and change the settings, then the quality gets better until either a song is paused or something else causes an interruption in the audio playback.

Seems it is a bug. It triggers itself back to SBC only no matter what headphones are connected. I have Phillips with AAC support and the worked fine before upgrade. AptX model I have is not working correctly too. So the only way now is to wait for the fix I think...

Thanks for following up to this thread, Syndirail and ylapas. Since I use bluetooth for music every day I won't be upgrading to Oreo until I know this issue is resolved.

Unexpected surprise - P10 with quite cheap Chinese QCY headphones just connected to high quality aptX audio and sounds great, while Phillips sounds like crap definitely Oreo bug in determining hardware capabilities.

ylapas said:
Unexpected surprise - P10 with quite cheap Chinese QCY headphones just connected to high quality audio and sounds great, while Phillips sounds like crap definitely Oreo bug in determining hardware capabilities.
Click to expand...
Click to collapse
Proof with QCY headphones connected.

My Sony headphone with LDAC is recognized and works very well.

Seems it can be a problem with headphones which does not have aptX / aptX HD or LDAC support, but have AAC. In Android 7 it worked well, in Android 8 it is for some reason limited to SBC only and never turned on, even if supported by the headphones.

ylapas, how can I view the bluetooth stats as you did in your attachment?

mattrask said:
ylapas, how can I view the bluetooth stats as you did in your attachment?
Click to expand...
Click to collapse
Developer options

mattrask said:
ylapas, how can I view the bluetooth stats as you did in your attachment?
Click to expand...
Click to collapse
You need to disconnect blutooth and reconnect, and then turn on your equipment..
My Sony UHP-H1 plays LDac to my Stereo and ht, my Xtz Divine headphones play aptX, and my Audio Pro T3 plays SBC, but it plays SBC from Spotify premium and all codes on Poweramp stunningly great...
SBC don't need to be poor with good signal, and good Dac and speakers...

I can't verify, can someone please do tests measure and verify. Huawei says no, you must buy mate10 or mate10 plus.
I try to get confirmation from Google Android but can't reach them.
I try to contact Sweden Google today.
Please update the thread...
---------- Post added at 08:21 AM ---------- Previous post was at 07:58 AM ----------
I contacted my telephone company on phone.
They are on the case, waiting for confirmation on mail.

Could anyone confirm if other codecs except SBC work? (I've also found issues on the Mate9 forum)
My Sony MF-100x connect only on SBC and the sound quality is not that great (when compared with an iPhone, not sure if only the codec is to blame though .. )
From developer settings any chance is reverted as soon as the dialog closes.

paul678 said:
Could anyone confirm if other codecs except SBC work? (I've also found issues on the Mate9 forum)
My Sony MF-100x connect only on SBC and the sound quality is not that great (when compared with an iPhone, not sure if only the codec is to blame though .. )
From developer settings any chance is reverted as soon as the dialog closes.
Click to expand...
Click to collapse
You must turn off blutooth before you turn on and choose LDac..,
---------- Post added at 07:35 PM ---------- Previous post was at 07:33 PM ----------
Forgot Huawei confirmed that aptX on P10 is working.. still waiting for confirmation on LDac...

Yes, aptX is working on my P10 (Oreo). Tested with Sony MDR XB950B1. Anyone using MDR 1000x to confirm LDAC?

I have Sony UHP-H1 bluray with LDac...
But i dont have time to test now..

I have Jabra BT320S...Not so bad BUT, remains in low quality even after playing in DEV settings... But its not that awful,i can deal with that...will try in car
Edit1...
Ive tried different earphones on my jabra bt.. surprise...the ones offering best audio quality are the one i paid 1.99 $ at Dollarama...really cheap/crappy and unknown mark ...with original settings.
The sound with original Jabra JVC HA-EB75 really sucks...gets better if i push the speaker inside my brain through the ear hahahah
Edit 2..
just found in...you know,that third drawer that we put unused stuff.....some old Samsung from S2 and Woahh...Those im gonna keep :silly:

GAMaus said:
Yes, aptX is working on my P10 (Oreo). Tested with Sony MDR XB950B1. Anyone using MDR 1000x to confirm LDAC?
Click to expand...
Click to collapse
Yes, aptX working fine, just not AAC - all my not aptX equipment is pushed back to SBC only now, even if it supported AAC in version 7 and sounded great.

Set a specific Bluetooth Codec in the Developer-Options

Hi Guys,
i am coming from an iPhone X and am now using a Note9. The Phone is absolutely great and i dont want to look back. Everything works fine, everything is really fluid just like it should be. But there is one annoying thing, that bothers me to hell: Bluetooth-Streaming Quality while Playing Music.
I am using several devices via Bluetooth: Bose Soundsport Free, Bose QC35II, Harman Kardon Go+Play and i am listening to Music in my Golf 7 via Bluetooth. Listening to music via the Bose Devices works really good. In the Developer Option, you can see that the Note 9 is using the AAC Codec, which the Bose do support. The Note 9 changes to AAC automatically.
When i am using the Harman Speaker and listening in my car, the Note 9 will stay at SBC (Standard Bluetooth Codec). This isnt really a problem for me, because the iPhone did it too. But the quality is worse on the Note 9 compared to the iPhone. On the Note 9, you can hear cracking noise in the Highs and the sound is overall not very good - the iPhone does this better with SBC (or stays with AAC even when the conneced device does not support it).
I had the same problem last year with my Oneplus 5. But with the OP5, i simply changed the Bluetooth Codec to always be APTX. This totally worked for me, even if the Bluetooth Device didnt support APTX. But on the Note 9, it will always change back to SBC, when i connect my Harman Speaker or my car.
I think it is just a bug. I didnt find a workaround. This is just a simple thing but it bothers me to hell... My mother's S9 does the same. It just doesnt save the setting.
The reason why i am making a thread is simple: Samsung does have a Samsung Members / Plus / Care (it depends where you are) App, where you can send in bugs, that you found.
Even if this bug doenst bother you, it would be very nice, if you can send in a request for changing this behaviour. That would help me (and maybe others), so that the Bluetooth Listening Experience will be as good as the Rest of the phone.
Thanks for the help.
If anyone knows a workaround for my problem - please let me know. At this stage, i cannot use my Harman Speaker und my Car Audio via Bluetooth.

the note 9 is an android device. So nothing is stopping you from 'fixing' it yourself. as you might not have realized yet, this is not a 'samsung' issue. you yourself said the onePlus also had the same issue.... its an issue of Android 8.
Anyways:
root and install the magisk module. If you are on a snapdragon device then are probably screwed. But sooner or later root or some other work around might arise...
good luck

It is definitly a Android Thing. But the fix for that Problem should be easy and is build into Android itself.
The Problem is, that Samsung does not save the codec, that i choose manually. The Oneplus 5 for example does save my setting. And with that Setting, all my Bluetooth Quality Issues would be solved.
So my goal for this thread is simple. It is difficult to motivate Samsung to Change this behaviour, if only one person needs that fix.
So it would be nice, if more people could report this behaviour to Samsung.

It autoswitches to the highest bluetooth codec the connected device negotiates that it can use. Very few autos connect to anything other than SBC. I have a different vehicle and do not experience any audio issues with the highs or lows using SBC. Your previous device was lying to you if you thought it was pushing AAC to a device that only accepts SBC.
Maybe try a different audio player and check the source file itself. I prefer "USB Audio player" because it doesn't alter flac/mp3/etc files and compress them further. Also check your dolby atmos settings.

Of course the phone does lie, if it does connect with APTX, even if the Speaker does support only SBC. But with that type of lying, it does work perfectly.
I am playing music via Spotify and the highest setting there.
In my car, i do have the upgraded Dynaudio System build in, and there i can hear the distortion.
With my Oneplus 5, i solved the problem by manually switching from SBC to APTX (even if my car does not Support APTX, it worked absolutely perfect)
That is the whole point... SBC on Android is not as good as on the iPhone. My iPhone X had no issues with my Harman Speaker, but my Note 9 and the Oneplus 5 do.. On the Oneplus i solved this by changing the Codec to Aptx.
I have a cheap Speaker (70 Euro) for my bathroom. This speaker does also connect via SBC, but doesnt have any problems with my Note. But this Speaker isnt nearly as good as the Harman Speaker or my car audio.
Do me a favor... Connect your SBC Speaker and play Still Got the Blues from Gary Moore.. It is really bad (the quality not the song).. The Bandwith is simply not enough with SBC.. but for some reason my iPhone X didnt had any Problems.. i think it just always used AAC even if the connected device didnt support it..

SuckOr said:
Of course the phone does lie, if it does connect with APTX, even if the Speaker does support only SBC. But with that type of lying, it does work perfectly.
I am playing music via Spotify and the highest setting there.
In my car, i do have the upgraded Dynaudio System build in, and there i can hear the distortion.
With my Oneplus 5, i solved the problem by manually switching from SBC to APTX (even if my car does not Support APTX, it worked absolutely perfect)
That is the whole point... SBC on Android is not as good as on the iPhone. My iPhone X had no issues with my Harman Speaker, but my Note 9 and the Oneplus 5 do.. On the Oneplus i solved this by changing the Codec to Aptx.
I have a cheap Speaker (70 Euro) for my bathroom. This speaker does also connect via SBC, but doesnt have any problems with my Note. But this Speaker isnt nearly as good as the Harman Speaker or my car audio.
Do me a favor... Connect your SBC Speaker and play Still Got the Blues from Gary Moore.. It is really bad (the quality not the song).. The Bandwith is simply not enough with SBC.. but for some reason my iPhone X didnt had any Problems.. i think it just always used AAC even if the connected device didnt support it..
Click to expand...
Click to collapse
play an audio file via a player ie:
power amp. and see if there is also an issue.
might just be the streaming app you are using. it might be just streaming bad/low quality and BT codec is adapting to it.( check streaming app audio settings..)
think of it like trying to convert an 96kbbs mp3 to 320 kbps.
garbage in, garbage out. Except in this case android is simply not upmixing and using high quality codec because there is no need to because source is low.
in power amp audio options, there are advanced audio settings which can allow you to force certain audio qualities. So test a high quality audio file in that player and see if audio is good.
if it is then you know the streaming quality is simply not high enough... which is not suprising as it IS a stream... reason why i also never stream and taking advantage if the 512 gb version if the note 9. to me it is folly to expect high quality from streams.

The music i am playing is from spotify.. Locally saved onto the phone with the maxed out setting - this is 320Kbits. As is said, the Oneplus had no Problem with the same setting after i changed the Codec manually.
But just for the record, i just bought the Song "Still Got the Blues" in the FLAC-Format. I played it via Power AMP on my Harman Speaker - the result is absolutely the same as with Spotify. So the Music is not the Problem.

SuckOr said:
The music i am playing is from spotify.. Locally saved onto the phone with the maxed out setting - this is 320Kbits. As is said, the Oneplus had no Problem with the same setting after i changed the Codec manually.
But just for the record, i just bought the Song "Still Got the Blues" in the FLAC-Format. I played it via Power AMP on my Harman Speaker - the result is absolutely the same as with Spotify. So the Music is not the Problem.
Click to expand...
Click to collapse
did you go to power amp settings and adjust/enable? ...on second picture, go there and press the setting sprocket...multiple settings to adjust.
also if you go to android dev options and set higher quality BT settings and codecs, do they stick when playing audio?

No, if i want to change the Setting while playing, nothing happens. The Note does not allow it while using a Bluetooth Device.
If tried it with ( Power Amp ). Nothing changed. Still bad Quality.

Hi All,
I also want to join in on this discussion, just that I want to use LDAC as I use Sony WI1000X bluetooth headset. I have the same issue of it not sticking to LDAC and reverting back to AptX. So far here is my experience:
- If the headset is not connected, changing to LDAC, exiting from and then retuning to Developers menu would result the codec changing back to AptX
- If the headset is connected then change the codec to LDAC, the codec sticks. But once it is disconnected, it will revert back to AptX
- While the headset is connected, I can switch between codecs in the Dev menu while listening to music and can notice the difference in audio quality
Yeah, would be great if codec of choice can stick or at least switch automatically either by detection or preset. LDAC is awesome and I'm so happy that I can enjoy the codec without using Sony phones (not that they are bad, I just prefer my Note 9).
---------- Post added at 01:50 AM ---------- Previous post was at 01:40 AM ----------
Ok funny enough, as I post my message, I got curious about something. I went to bluetooth menu, click the gear icon on my paired Sony WI1000X, and there it is.... a slider to toggle the LDAC codec on/off.
It is greyed out, so I exit the menu, switched on my bluetooth, came back in that menu, switch LDAC on, checked Dev menu, it is also set to LDAC. Good.
Then I switched off my bluetooth, at this point the LDAC option in Dev menu should have reverted back to AptX.... but it stays in LDAC mode! This is great!
I guess my small inconvenience is now solved, maybe you can try the same for your AptX device.

Can anyone confirm whether AptX Adaptive is included or not (eg. from actually listening, it's still not listed in the Developer Options)? They have removed "Samsung HD" as a codec as well.

I have since my Galaxy S5 the Same Problem.
Galaxy S4
Galaxy S6
Galaxy S7
Galaxy Note 8
The Bluetooth quality is really a mess.
I do not have the Problem with my one plus 4. And also with any kind of iPhones

You can change this in basic Bluetooth settings
If your Bluetooth audio device supports codecs you should find the setting in your Bluetooth connection settings where you find the media audio and call audio settings under them there is the basic codec...
Found this on Reddit . Worked on my Sony wi 1000x

Solved it for note9
I had this problem with the amazing WF-1000XM3 and just couldn't get them to change to AAC.
So the solution was turning off the dual audio option in Bluetooth. I even tested this, and as soon as I turned on dual audio the codec switched back to sbc.
Settings>connections>Bluetooth>advanced>dual audio
And if it doesn't automatically switch over then, force it once through the developer options and it should stay like that thereafter.

I'm tossing my hat into the ring here, because this is maddening. I don't understand how we can all have 2-3 different user experiences on the same device.
OK, so, presumably, we're all on Andoid 9. Since the start of this thread, I imagine updates have played at least a minor role in user experience and menu options.
Here's where I'm at: I've never been able to successfully change AND have the settings found within Developer Options actually "stick". I can access "Bluetooth Audio Codec", and from there I can see SBC/AAC/aptX/LDAC/Scalable/All/Default as options. It does not matter which one I tap on, the result is the same: I can visibly confirm the change was made when selecting the codec I want and the screen goes back to the main Dev Options menu. If I hit the back button, and go right back into Dev Options, it has auto-reverted back to SBC. This is, of course, with no active BT devices connected for audio.
I recently traded in a car which did not support Android Auto, and therefore my only option was BT for audio streaming. When using this, the quality was fine, even subjectively good. However, now I've got a car whose stereo supports Android Auto, but only via USB (not BT). I can confirm that, via the display on the head unit of the infotainment system, it is using (or attempting to use) A2DP for streaming, which would indicate my phone should be using aptX or similar. Even so, the audio quality is absolute ****. If I connect my USB cable, and resume audio via Android Auto, the quality vastly improves. There is no reason why my phone or the BT connection would or should be operating under SBC or any kind of inferior BT codec when streaming. Mind you, all of this is done using the same player: PowerAmp Pro.
TL;DR - Has anyone found a way to forcibly allow all codecs, so that the highest quality codec is used on a per-device basis?

Just the same problem
Yes i have exactlly the same problem
Please Samsung...FIX THIS!!
---------- Post added at 11:52 AM ---------- Previous post was at 11:32 AM ----------
I have tried what KASHY27 said in his post and works perfectly!
Turn off dual audio in bluetooth settings and then click aptx in developers options
Thanks KASHY27!!

SuckOr said:
Hi Guys,
i am coming from an iPhone X and am now using a Note9. The Phone is absolutely great and i dont want to look back. Everything works fine, everything is really fluid just like it should be. But there is one annoying thing, that bothers me to hell: Bluetooth-Streaming Quality while Playing Music.
I am using several devices via Bluetooth: Bose Soundsport Free, Bose QC35II, Harman Kardon Go+Play and i am listening to Music in my Golf 7 via Bluetooth. Listening to music via the Bose Devices works really good. In the Developer Option, you can see that the Note 9 is using the AAC Codec, which the Bose do support. The Note 9 changes to AAC automatically.
When i am using the Harman Speaker and listening in my car, the Note 9 will stay at SBC (Standard Bluetooth Codec). This isnt really a problem for me, because the iPhone did it too. But the quality is worse on the Note 9 compared to the iPhone. On the Note 9, you can hear cracking noise in the Highs and the sound is overall not very good - the iPhone does this better with SBC (or stays with AAC even when the conneced device does not support it).
I had the same problem last year with my Oneplus 5. But with the OP5, i simply changed the Bluetooth Codec to always be APTX. This totally worked for me, even if the Bluetooth Device didnt support APTX. But on the Note 9, it will always change back to SBC, when i connect my Harman Speaker or my car.
I think it is just a bug. I didnt find a workaround. This is just a simple thing but it bothers me to hell... My mother's S9 does the same. It just doesnt save the setting.
The reason why i am making a thread is simple: Samsung does have a Samsung Members / Plus / Care (it depends where you are) App, where you can send in bugs, that you found.
Even if this bug doenst bother you, it would be very nice, if you can send in a request for changing this behaviour. That would help me (and maybe others), so that the Bluetooth Listening Experience will be as good as the Rest of the phone.
Thanks for the help.
If anyone knows a workaround for my problem - please let me know. At this stage, i cannot use my Harman Speaker und my Car Audio via Bluetooth.
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im using sony xm4 and samsung note 9. note9 keeps going back to bt aac codec. i was able to make it stay to ldac by setting [connecting 2 devices = off] in sony headphone app under system. it was noted in the app that ldac can not be used when this setting is enabled.

2022 and this is still not fixed. A shame android.