Post edited for quick answer.
I've confirmed that the Xiaomi Mi Mix supports both APTX and APTX HD. I'm running the 8.2.5.0 MAHMIDL global ROM without modification.
TL;DR
Equipment and software used:
Audio Technica ATH-DSR9BT Bluetooth headphones.
Xiaomi Mi Mix 256/6
Onkyo HF music player with pro unlock.
Laptop with Wireshark
Protocol:
Tap phone to headphones for NFC facilitated Bluetooth pairing with ATH-DSR9BT.
Verified pair by playing a FLAC file on phone and listened to playback on headphones.
Stopped music and turned off headphones.
From settings, developer options were activated by tapping the MIUI version (ROM build) several times.
Activated Bluetooth HCI Snoop log through:
Settings/Additional Settings/Developer Options/Bluetooth HCI Snoop Log (on)
Immediately turned the headphones back on, and played the same FLAC music file in Onkyo HF Player and listened to playback for about 8-10 seconds.
The ATH-DSR9BT headphones themselves feature status lights that indicate which CODEC is being used for playback. Indicator light 3 flashed purple every few seconds, which indicates that APTX HD is being used.
For absolute certainty, the HCI Snoop log from the phone was copied to a laptop and opened in WireShark for analysis. The Xiaomi Mi Mix and the ATH-DSR9BT negotiated a vendor CODEC (0x0024) where Qualcomm was the vendor. More specifically, the CODEC was verifiably set after it was exchanged in discovery as SEID audio sink 7. The CODEC was verifiably set via the set command recorded in the Snoop Log.
APTX was also offered, but wasn't selected as it is inferior to APTX HD.
In any case, that puts this question to bed. I suspect that this isn't an advertised feature because it may not have been officially implemented and could have been made available after release and after marketing material and specifications were already released.
Thanks, and get yourself some good headphones and enjoy Bluetooth audio on your Xiaomi Mix in high fidelity.
i quote a review detailled :
There’s also no aptX support here for high quality Bluetooth audio either, so Bluetooth headphone or car stereo users may want to look elsewhere for a higher quality wireless audio experience.
Click to expand...
Click to collapse
I'm not referring to out-of-the-box capability. I'm asking if there are ROMS that enable it because the hardware is already there.
Car audio comes across great on mine, wouldn't probably notice it if it had aptX ...
I've confirmed that it the Mi Mix supports both APTX and APTX HD. I'm running the 8.2.5.0 MAHMIDL global ROM without modification.
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.
Click to expand...
Click to collapse
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.
Hi XDA Community
Setup:
Native Instruments Komplete Audio 6 (connected to a USB 3.1 HUB because otherwise 48V Phantom Power does not work)
Two Condenser MICs connected to INPUT 1 and INPUT2 of the USB Sound card, powered by 48V
Samsung DEX Dock
Samsung Galaxy Note 8 (Single Sim) running Android 9 (2020 May Security Updates)
Findings:
1) Signal Messenger App
recording Voice Messages seems to use 44100 Hz recording, and the USB is most likely set to 48000 Hz. This results in crackling and digital noise in the recorded audio file
i played around with the Voice Recorder (see 2) and many other things, and Signal Messenger on DEX Screen suddenly started to record nearly correctly on 48000 Hz..
No digital noise
Records Line 1 and Line 2 onto just the left side of a stereo signal. Playback of that recording plays only on Left Speaker
After rebooting, today i cannot get this behaviour back, digital noise is there and i struggle again to find a solution how to tell Android 9 to use 48000 Hz for Signal Voice Recording or any other app with the lack of settings
i tried Voice Call with Signal Messenger on DEX Screen, but the Audio was forced to Earpiece or Speakerphone, especially the other side complained about crackling in sound quality which only disappeared, when i started Signal Messenger on the Mobile Screen on the Note 8, then it used only the internal mic and the Speakerphone, and other party said the quality is really good, but not what i want with the external mics
2a) Voice Recorder (there are several) https://play.google.com/store/apps/d....app.voicenote
can choose 44100 and 48000 Hz after my USB Soundcard is recognized and it also shows recording from External Mic Notification.
If I choose 48000 Hz the sound has no crackling or digital noise, it is crystal clear, but mono, it records both inputs on a mono track, stereo setting is greyed out
if i chose 44100 Hz i have digital noise, crackling.
uses system audio drivXDA
2b) Voice Recorder (another on) https://play.google.com/store/apps/details?id=com.splendapps.voicerec
can choose 44100 and 32000 Hz and you can even chose stereo and here it works
with 44100 Hz there is digital noise, but stereo
with 32000 Hz there is no digital noise, it is a preset called FM quality and i would like to use this for voice recording for broadcasting on FM later, we run a show on the radio
3) Audio Evolution Mobile Studio DEMO Version
comes with custom audio drivers (like DAWs on Windows also use the ASIO Drivers that are invented by Steinberg Cubase)
can use all inputs from an USB soundcard for recording in any setup with any KHz or bit in mono or stereo setup
in my case this was the only tool where i can correctly record my stereo mic setup
very nice but cannot change System Settings since comes with custom LOW LATENCY driver
maybe i will buy this Actually i use Steinberg Cubase on Windows usually
4) Zoom App
i tried a Video Meeting with Zoom App on Android 9 on this Samsung Note 8 to a Windows Laptop in different country
did not work at all on DEX, crashed on the DEX screen after joining the meeting
neither external USB Soundcard worked
if you launch on the mobile only Speakerphone, Earpiece and Internal Mic is supported
video freezes for both parties if I switch to a different app and continues if i put Zoom App in foreground
5) Google Meet
runs on Samsung DEX Screen perfectly
can present my screen from DEX
did not test with external soundcard
other paties video continues to work in background
my camera that is shared to the other partie does not record if i switch Meet App to background
better than Zoom App on Android, no wonder its Google
6) WaveEditor
best Multitrack Audio Editor that I have seen so far
Works on Samsung DEX
not really for recording but for editing/cutting/postpro
Free Version has most features, but for pro editing like compressing/parametric EQ need to buy the Pro version, I am thinking about that
really good tool, I am very happy
Conclusion:
In Signal Messenger App I have also this crackling if I record a Voice Message (and it Runs on Dex), so I suppose I need to tell Android Audio Manager to use 48000 Hz on my USB Soundcard Inputs. But how? I would like to see a Audio Manager Configuration Tool, that can change this System Wide
How do I achieve this? Any Ideas are welcome. Thanks for reading and thanks for your time posting a reply. Good day.
PS, i also opened a support Case at Samsung (in Community and Support) kee p you updated if they answer.