Related
Just found out no Apt-X HD for S7E.
http://www.trustedreviews.com/opinions/what-is-aptx-hd
I was thinking of getting the LG tone platinum and Apt-x HD is one of its selling points. Apparently the new LG phones will have it.
You would think since Qualcomm owns the technology we would have it in our phones or at least the Qualcomm versions.
Sent from my SM-G935T using Tapatalk
TBH, I would not worry or make it a buying point of a phone. The codec sounds good (although unnecessary for wireless listening and most probably inflated) but with the compression required over BT there is always going to be a trade off.
If you want good fidelity listening then a phone and Bluetooth cans is not the way to go anyway.
Oh and on top of that, after a quick search I could only find a single pair of headphones that allegedly support it which were on Amazon and no reviews about them etc...
chippyuk said:
TBH, I would not worry or make it a buying point of a phone. The codec sounds good (although unnecessary for wireless listening and most probably inflated) but with the compression required over BT there is always going to be a trade off.
If you want good fidelity listening then a phone and Bluetooth cans is not the way to go anyway.
Oh and on top of that, after a quick search I could only find a single pair of headphones that allegedly support it which were on Amazon and no reviews about them etc...
Click to expand...
Click to collapse
As an audio engineer, and music composer who works with various forms of audio codecs, the difference between 16 and 24 bit in .wav files is almost unnoticeable, and that's with proper studio equipment. That's not to undermine that with apt x the extra headroom might provide a higher quality stream, but for streaming to your colored car audio system, regular old aptX is 100% fine.
I was hoping for more headroom in the dynamic range with Apt-x HD and now with the lackluster wired headphone performance on the SGE7. It's just a bit of a letdown
I ordered the SanDisk 200 gig. The goal was to finally replace my Ipod Classic 160.
Thanks for your input.
Sent from my SM-G935T using Tapatalk
I have Bluetooth UHQ on the S7 activated and paired with Samsung Level One Pro that support the Bluetooth UHQ. It does sound better but needs more resources.
Shame, no 2016's technologies, no Quick Charge 3.0, no Apt-X HD, no USB Type-C... and you know what ? S8 will have all of this but the S8 will not have the 2017's technologies so , no very mega Quick Charge 4.0, no Apt-X Ultra HD, no USB Type-D . Ok I trolled the last phrase, but maybe my troll will be realistic.
minoch said:
Just found out no Apt-X HD for S7E.
http://www.trustedreviews.com/opinions/what-is-aptx-hd
I was thinking of getting the LG tone platinum and Apt-x HD is one of its selling points. Apparently the new LG phones will have it.
You would think since Qualcomm owns the technology we would have it in our phones or at least the Qualcomm versions.
Sent from my SM-G935T using Tapatalk
Click to expand...
Click to collapse
I had the LG Tone which are identical minus the "HD". Nothing special TBH. I hope the new version is better!
Does the Exynos supports apt-x?
Update : yes, it does But does it support aptx HD?
It doesn't support Aptx-HD, then again, I don't think there is any current headset that do.
calm your tits
For get apt-x HD, the only important part is APT-X itself.
This is already CD quality with no lags (almost), HD is 8 bit more yes, but you most likly not even notice the difference between 16 and 24 bit.
well if youre an audio professional you might be able to tell the difference, true but this is a science on its own.
but for this you need capable equipment and the audiosource too.
both you probably aint gonna have mobile neither do you really need it.
the HD addition is in first line a marketing thing, and given that there only a handful , and i mean literally a handful, useable mobile apt-x headphones and headsets out there it wont matter at all. hell the best around ear set unter 500$ is sennheiser which means it looks very grim for high soundquality mobile devices anyway.
important is only that apt-x finally get distributed and lets hope headset and phone manufacturer finally put it in by default. then again most wont profit much due to their poor builds anyway - looking at bose here
btw those heaedset that already support HD - forget it. they may technically able to transfer the data but their audio hardware including drivers wont cut it to really use it
minoch said:
Just found out no Apt-X HD for S7E.
I was thinking of getting the LG tone platinum and Apt-x HD is one of its selling points. Apparently the new LG phones will have it.
You would think since Qualcomm owns the technology we would have it in our phones or at least the Qualcomm versions.
Click to expand...
Click to collapse
Honestly mate, APTX HD is a complete waste of time on a phone, and probably on anything. The ONLY thing 24 bits are going to do is give you a lower noise floor. Let me say that again, so that it sinks in. The ONLY thing 24 bits is going to give you is a lower noise floor. That's it, period.
But since 16 bits already gives you a 96dB s/n ratio, that means that at any sensible listening levels, the noise is *way* below ambient background noise (unless you are listening at high volume in a perfectly silent room).
Then there's the small matter of the phone's electronics which perhaps produce more than -96dB of noise anyway, not that you can hear -96dB noise in any real world listening environment.
24 bit is a waste of time for consumer audio. For studio work and multiple overdubs, then yes perhaps. Other than that, it's all snake oil.
Im going from an s5, that has the aptx codec (not aptx hd from what i read), to a exynos s7, that doesn't have aptx. My question is, will the difference in sound quality be noticeable? My bt headphones aren't nothing special and are cheap (mpow swift) but they do support aptx and i have been happy with the sound quality using my s5, so i was wondering if i will notice any difference.
griffin_1 said:
Im going from an s5, that has the aptx codec (not aptx hd from what i read), to a exynos s7, that doesn't have aptx. My question is, will the difference in sound quality be noticeable? My bt headphones aren't nothing special and are cheap (mpow swift) but they do support aptx and i have been happy with the sound quality using my s5, so i was wondering if i will notice any difference.
Click to expand...
Click to collapse
There's plenty of reasonably high-end and well regarded headphones that don't support aptx, and yet some cheapies that do. Conclusion: if it's not a critical for the high-end headphones, then you shouldn't miss it with your "nothing special" headphones.
S7 Edge (US version, Snapdragon) on Android 7 (Nougat) had always aptX support, besides the native Samsung UHQ HD audio. Actually every phone with Snapdragon that I have tested (Motorola) had aptX since Qualcomm bought off CSR plc in 2015. Tested personally with Developer Mode, Bluetooth HCI Snoop log and decoded with Wireshark on PC.
And now, with Android 8 (Oreo) gained LDAC support too (Sony), thanks to Google. See the attached pic.
PS: The difference between codecs can be appreciated only when playing FLAC files.
Do we know if Axon 7 includes that codecs on Axon 7?
Is it possible if not included at first one to be done via firmware update or is it hardware matter and not possible at all.
https://www.qualcomm.com/news/relea...delivers-high-resolution-audio-over-bluetooth
https://www.aptx.com/how-it-works
http://www.trustedreviews.com/opinions/what-is-aptx-hd
Sent from my iPad Air 2
I was looking this up just today and there are no clear answers. Just a thread saying that the rights to it was bought by Qualcomm and the radio required is the CSR8675 which was released 2 years ago.
Anyone have any idea if the A7 supports aptx?
Unfortunately seems Axon 7 doesn't have the required chip for supporting AptX HD.
http://www.whathifi.com/advice/aptx-hd-bluetooth-what-it-how-can-you-get-it
It's really sad because Axon 7 one of the key selling features is overall sound experience and decision ZTE not bring the ultimate performance in Bluetooth technology is fail despite there's several Bluetooth stereo hands free support AptX in the market.
Personal I own 2 LG Tone Platinum but can't take advantages of AptX since Axon 7 doesn't support it.
Sent from my iPad using Tapatalk
What is aptX HD? We already have a fantastic DAC, what else do you need?
What is aptX HD? We already have a fantastic DAC, what else do you need?
Click to expand...
Click to collapse
It's for high fidelity bluetooth audio
Locklear308 said:
What is aptX HD? We already have a fantastic DAC, what else do you need?
Click to expand...
Click to collapse
At first post there's very useful link to understand what is it.
Did you make any attempt to read it or not?
Sent from my iPad using Tapatalk
Unfortunately, Huawei and ZTE don't seem to offer aptX at all, since it requires a licence fee to Qualcom. OTOH, Motorola offers aptX at least from the Moto G line upwards but hardly ever mentiones that fact, Sony includes it in most devices, Samsung in some.
Before you think that it is something hi fidelity thing you can read article on above link. Qualcomm aptX max resolution is 44.1/24 and it is compressed with ratio 4:1. So the result is enough good quality but it is very very far from what you get with DAC on jack.
obladi64 said:
Before you think that it is something hi fidelity thing you can read article on above link. Qualcomm aptX max resolution is 44.1/24 and it is compressed with ratio 4:1. So the result is enough good quality but it is very very far from what you get with DAC on jack.
Click to expand...
Click to collapse
OHHHH, I remember this now! Yeah this is completely useless technology. 90% of my vinyl rips are like 5000 kbps or more. Lol. HD audio over Bluetooth... Yeah right. XD
However don't give a **** about it's apt x HD licensed or not. Indeed i was also worried it's not listed and supported.
Stopped by just personal user experience. I compared BT audio with HTC 10, HTC m8, iPhone 7 plus (which was supposed to be equipped with the best BT chip called by them W1, piece of crap, it's always 4.2,BT 5.0 gonna be maybe improved).
I made the test with really average to bad quality BT headphones but only one i have 32 ohm noontec wireless HD II (for sure better than beats audio).
My conclusions are clear.
No matter i listen to tidal premium or yt axon 7 us sounds like from outer scale, smoke every other device outta water in every aspect, loudness, crispness, stage selection, stereo, just everything... Not comparable, like God among us
Sent from my ZTE A2017U
No matter the differences in quality from 3.5 audio jack port and Bluetooth the fact is that ZTE made mistake not including the most advanced Bluetooth audio chip to the device.
Not everyone like cable connecting to the phone all time.
Personal I've never being fan of hands free with cable connected to 3.5 audio jack.
I always prefer something cable free not only for listening music but for calls also.
Since we see more and more manufacturers make Bluetooth hands free with AptX HD support the smartphone manufacturer should support it also.
Sent from my iPad using Tapatalk
on samsung's website they say this, does it mean that it had a better DAC?
abdelha said:
on samsung's website they say this, does it mean that it had a better DAC?
Click to expand...
Click to collapse
I don't know much about audio, that jargon does make it sound good though. Hopefully it translates to high quality sounding music.
It can be high quality processed but the sound may still be not so great. The s7 edge I had had horrible headphone output. At this point, I may consider Bluetooth headsets to overcome Samsung crappy dac
Sent from my ZTE A2017U using Tapatalk
I'm wondering if it's a reference to this technology: http://www.trustedreviews.com/news/...quality-tech-will-upscale-any-audio-to-32-bit
Wenbinbin2010 said:
I'm wondering if it's a reference to this technology: http://www.trustedreviews.com/news/...quality-tech-will-upscale-any-audio-to-32-bit
Click to expand...
Click to collapse
Matches up completely with the Samsung info so looks like it. Hopefully it'll sound good enough. At least they are including better earphones this time. Won't replace the ones I already have but it's nice all the same.
abdelha said:
on samsung's website they say this, does it mean that it had a better DAC?
Click to expand...
Click to collapse
DAC is sound hardware which enhance the clarify and quality of audio, Mention by Samsung website is playable format and bit rate which has nothing to do with high quality audio or DAC
Find more info on DAC here : http://www.ubergizmo.com/what-is/dac/
onlinejobwork said:
DAC is sound hardware which enhance the clarify and quality of audio, Mention by Samsung website is playable format and bit rate which has nothing to do with high quality audio or DAC
Find more info on DAC here : http://www.ubergizmo.com/what-is/dac/
Click to expand...
Click to collapse
but higher bit rate means better quality...
abdelha said:
but higher bit rate means better quality...
Click to expand...
Click to collapse
If bit rate is higher but audio chip is poor or not DAC than audio output is poor or not so great even if it high sampling rate , but is sound coming through DAC than Audio quality is much better than higher bit rate with normal or non DAC audio chip, Source need to be superior quality than medium itself
I'm not sure what you mean by "non DAC audio chip"? A DAC is a Digital to Analogue Converter (inverse of an ADC), so to convert digital music to sound there needs to be a DAC in the circuit somewhere. Absolutely true that there are different qualities of decoder, converter and amplifier, and you should not mistake specs for quality (a common error in other components, and actively encouraged by marketing), but all 3 elements will be present in any audio output circuit, whether the manufacturer draws attention to them or not.
Large Hadron said:
I'm not sure what you mean by "non DAC audio chip"? A DAC is a Digital to Analogue Converter (inverse of an ADC), so to convert digital music to sound there needs to be a DAC in the circuit somewhere. Absolutely true that there are different qualities of decoder, converter and amplifier, and you should not mistake specs for quality (a common error in other components, and actively encouraged by marketing), but all 3 elements will be present in any audio output circuit, whether the manufacturer draws attention to them or not.
Click to expand...
Click to collapse
btw if you are not sure as you asked, let me clarify when I said "non DAC audio chip" I was actually tried to say " normal DAC" instead of Upgraded Quad DAC which is the first in the world and introduced with LG V20 and now in LG G6, in the case of S8 this is Normal (not non) DAC Audio chip, more info translated below:
'LG G6', Upgraded Quad DAC to get a music enthusiast
LG Electronics will upgrade its next-generation premium smartphone 'LG G6' with a quad DAC (Digital-to-Analog Converter). The new Quad DAC is supplied by ESS, a company specializing in high-performance audio chipsets.
The new quad DAC features fine control of left and right sound, enhancing sound balance and reducing noise.
,the more the sound distortion and noise are reduced more effectively, resulting in a clean sound quality. The quad DACs implement four DACs on a single chip, reducing the size by a factor of four and noise by up to 50% when using one DAC.
The new quad DAC applied to the 'LG G6' effectively controls the left and right earphones separately to control the left and right earphones separately. Also, by adjusting the balance of sound, listeners can feel the stereoscopic feeling of listening to music directly at the concert scene, Get rid of noise and deliver vivid impression
The LG G6 eliminates noise from loud as well as loud sounds, providing crisp, clean sound.
The new Quad DACs have increased circuit integration, lowering the negative distortion to 0.0002% of the luxury audio level and minimizing the loss of acoustic information. As the loss of information is less, the listener can hear a clean sound close to the original sound.
The path for transmitting sound signals inside the chip has also been widened. The ability to process large, high-quality sound sources quickly and accurately allows listeners to enjoy high-volume 32-bit hi-fi sources without interruption.
Ah, the curse of auto-correct I guess
Trouble is that you don't get the high quality DAC chip with the G6 unless you live in Korea, or at least Asia. If LG offered the 64GB + quad DAC version in Europe I'd probably have bought one, but we only get the most basic model.
Read somewhere that the audio is much better than the s7 headphones wise (which is great because I HATED the audio quality from the s7). It's said to be louder and sound better. Best thing to do is to head to best buy with good headphones and check it out
Sent from my ZTE A2017U using Tapatalk
And here I am just sad that they only include those uncomfortable in-ear headphones, I would have preferred non-sealing earbuds. Those AKGs won't come out of that box
The sound quality is simply incredible. I tested DSD files it's just mind-blowing
godzi1971 said:
The sound quality is simply incredible. I tested DSD files it's just mind-blowing
Click to expand...
Click to collapse
Where did you test it? And where did you find dsd files? Lol
Sent from my ZTE A2017U using Tapatalk
I use the device right now, and I bought 3 albums on the internet
godzi1971 said:
I use the device right now, and I bought 3 albums on the internet
Click to expand...
Click to collapse
Exynos or snapdragon?
GermanGuy said:
Exynos or snapdragon?
Click to expand...
Click to collapse
Exynos 8895
how does it go against the htc 10 or the g6...
any comment on sound quality now that some people have theirs?
Hello, i searched on internet and i found out that there are G6 models with HI-FI Quad dac build in in settings. Is there a way to add the settings also to H870 via root or something?
I would love it to have, i use high impedance Marshall headphones. The audio quality is good but i wonder how it would be with the hi-fi settings enabled.
Image: i63.tinypic.com/2dkbwpv.jpg
Do you know H870 don't have quad dac?
Wysłane z mojego LG-H870 przy użyciu Tapatalka
Novatini said:
Hello, i searched on internet and i found out that there are G6 models with HI-FI Quad dac build in in settings. Is there a way to add the settings also to H870 via root or something?
I would love it to have, i use high impedance Marshall headphones. The audio quality is good but i wonder how it would be with the hi-fi settings enabled.
Image: i63.tinypic.com/2dkbwpv.jpg
Click to expand...
Click to collapse
Well, at the moment you can't add missing hardware using software methods
Ok, i understand, so it's a missing hardware component in my h870. Now the question is, it's a big difference in audio quality? did you had the chance to compare them?
Novatini said:
Ok, i understand, so it's a missing hardware component in my h870. Now the question is, it's a big difference in audio quality? did you had the chance to compare them?
Click to expand...
Click to collapse
The quad DAC is only on dual sim models.
Now, about the differences. I can switch the quad DAC on and off on my G6. I also use high impedance headphones, the Beyerdynamic DT 770 pro. I am sorry to report that the differences between DAC on and off are huge!.. The volume levels get a massive boost and the sound becomes much richer. But all these are achieved only when using high impedance ( >50 ohms), with normal headphones the differences are not so noticeable.
The quad DAC (along with the wide angle camera) are the only two reasons that I am stuck with LG phones. They are solid handsets anyway, but these two are killer features for me.
Novatini said:
Ok, i understand, so it's a missing hardware component in my h870. Now the question is, it's a big difference in audio quality? did you had the chance to compare them?
Click to expand...
Click to collapse
I am using different phone as my music player and it's equipped with dedicated DAC - and yes, the difference in sound quality when compared to other phones (without dedicated DAC) is really big.
The only non-dediacted-DAC phone that sounds good for me is my Xperia XA2, my company phone. But it's a SONY and for me actually SONY was always a second name for good sound quality. Clear Audio plus their other audio tricks work great.
But that's when speaking about phones. Now, recently I got a tablet which I use to listen to the music/watch movies at home. It's Huawei MediaPad M5 Lite. And its sound quality is just A-MA-ZING. I've never heard anything like this before. Either speakers (four of them, Harman Kardon branded) or headphones sound just incredibly great. When playing music through the speakers, it sounds much better than most of laptops that I've heard until now. I love playing binaural audio tracks from youtube, as it really creates spatial audio around listener's head using these 4 speakers.
I feel it also has to have some dedicated DAC, because the sound is so clear and dynamic, that I can't compare it to anything I've heard before (maybe close to Sound Blaster E5 that I'm using with my PC) - and it utilizes something called "Huawei Histen".
Compared to all these toys plain, normal, LG G6 sounds just "yeah, quite OK". No "audio fireworks" and no jaw dropping quality, but just pleasant sound. It's a pity that there is no equalizer built in the phone software (on the other hand you can use something else - and I really recommend the "Neutralizer" application from the Play Store, it's really good and totally different than all the other equalizer apps out there).
I was looking for a relatively cheap Bluetooth DAC that could do the job for me. One of my friends were using a AK XB10, which I tried a few years ago when he first got it. The DAC performs great when paired with most of the phone I was using. But I forgot Aptx HD are a Qualcomm IP and it didn't work with my G950N with Exyons SoC (but strangely Aptx works)
I only found out the problem after I use the DAC for 15 minutes. the sound quality is really disappointing. And I started to google a bit and learn the Exynos don't have Aptx HD, and all the way the xb10 is using Aptx. The difference was so huge that my 24bit flac sounds worse than 192kbps MP3. And sadly the AK xb10 didn't support LDAC.
So now I have to buy another Bluetooth DAC now.
Type2501 said:
I was looking for a relatively cheap Bluetooth DAC that could do the job for me. One of my friends were using a AK XB10, which I tried a few years ago when he first got it. The DAC performs great when paired with most of the phone I was using. But I forgot Aptx HD are a Qualcomm IP and it didn't work with my G950N with Exyons SoC (but strangely Aptx works)
I only found out the problem after I use the DAC for 15 minutes. the sound quality is really disappointing. And I started to google a bit and learn the Exynos don't have Aptx HD, and all the way the xb10 is using Aptx. The difference was so huge that my 24bit flac sounds worse than 192kbps MP3. And sadly the AK xb10 didn't support LDAC.
So now I have to buy another Bluetooth DAC now.
Click to expand...
Click to collapse
Check out the FiiO BTR3, it supports LDAC which should work regardless of processor since it's in base android and also theoretically higher quality than aptx.
TheTofu said:
Check out the FiiO BTR3, it supports LDAC which should work regardless of processor since it's in base android and also theoretically higher quality than aptx.
Click to expand...
Click to collapse
I bought the earstudio ES-100 from Amazon, now waiting for it to arrive. It is slightly more expensive than the BTR3 and xb10 , but reviews suggested it should sounds better.
Speaking of LDAC, I read a article online about LDAC vs aptx HD, turn out that most of the time LDAC is default at 660kbps, not the advertised 990kbps. And the sound quality when using 660kbps is not necessarily better than atxp HD.
Type2501 said:
I bought the earstudio ES-100 from Amazon, now waiting for it to arrive. It is slightly more expensive than the BTR3 and xb10 , but reviews suggested it should sounds better.
Speaking of LDAC, I read a article online about LDAC vs aptx HD, turn out that most of the time LDAC is default at 660kbps, not the advertised 990kbps. And the sound quality when using 660kbps is not necessarily better than atxp HD.
Click to expand...
Click to collapse
While true, you can also go into developer options and pick a specific bitrate to use, and considering it's going to be in a car with maybe 2-4ft of range i don't see 990kbps having issues.
The article makes it sound like it's a great big hassle for regular users, but I posit that regular users won't notice any difference in quality if they're just playing "high quality" Spotify, and if you do care enough to play files at high res you should be familiar enough with tinkering to tap a few buttons.
Now the better argument is whether the earstudio actually sounds better than the FiiO, and basing off of reviews that compare the two directly that answer seems to be that it's not better but a little different, though it does have some nifty features that the FiiO lacks.
Then again with it being in a car it likely won't matter since they're more useful for headphones.
What I wish someone would do is make something like either of those devices but without a battery so that it doesn't stay connected when the car is off.
TheTofu said:
While true, you can also go into developer options and pick a specific bitrate to use, and considering it's going to be in a car with maybe 2-4ft of range i don't see 990kbps having issues.
The article makes it sound like it's a great big hassle for regular users, but I posit that regular users won't notice any difference in quality if they're just playing "high quality" Spotify, and if you do care enough to play files at high res you should be familiar enough with tinkering to tap a few buttons.
Click to expand...
Click to collapse
I first found out the problem with XB10 after I dig into the developer menu and found no aptx HD. I think that article is for those who don't really knows what Bluetooth audio should perform in the real world. And also a informative read for me, since I only had a rough idea of Bluetooth audio standard before.
Now the better argument is whether the earstudio actually sounds better than the FiiO, and basing off of reviews that compare the two directly that answer seems to be that it's not better but a little different, though it does have some nifty features that the FiiO lacks.
Then again with it being in a car it likely won't matter since they're more useful for headphones.
Click to expand...
Click to collapse
Think in a bit more on that, it might be just down to which amp works better with which iem. Since I had no where to test the earstuio, I can only cross my finger and hope it works well with my Westone w4r.
BTW, I wish my car is quiet enough so I can care about bluetooth audio quality. The tyre noise is just bad that it doesn't matter anymore. And only two door speaker doesn't help ether.
What I wish someone would do is make something like either of those devices but without a battery so that it doesn't stay connected when the car is off.
Click to expand...
Click to collapse
I think some sony head unit already support LDAC and didn't cost much more than your FiiO, if car audio is all you want. And you don't have to amplify the signal twice (or is there a line out on the FiiO? Idk)
Type2501 said:
I first found out the problem with XB10 after I dig into the developer menu and found no aptx HD. I think that article is for those who don't really knows what Bluetooth audio should perform in the real world. And also a informative read for me, since I only had a rough idea of Bluetooth audio standard before.
Think in a bit more on that, it might be just down to which amp works better with which iem. Since I had no where to test the earstuio, I can only cross my finger and hope it works well with my Westone w4r.
BTW, I wish my car is quiet enough so I can care about bluetooth audio quality. The tyre noise is just bad that it doesn't matter anymore. And only two door speaker doesn't help ether.
I think some sony head unit already support LDAC and didn't cost much more than your FiiO, if car audio is all you want. And you don't have to amplify the signal twice (or is there a line out on the FiiO? Idk)
Click to expand...
Click to collapse
Fair enough about road noise, I'm hoping to fix some wind noise at some point. Tires are already as good as can be pretty much, without being wasteful, you always want the best you can get though, it's arguably the most critical part of your car in emergency situations (having enough grip to break and stop, emergency lane change, or accelerate and gtfo)
Issue with the head unit is that most modern cars are notoriously hard to put head units in. My car is a 2012 and I need like 2-3 different adapters that add an additional 80-120 to the cost, plus the time to install, all to get a piece of my dash to stick out like a sore thumb since it's not a factory look.
And even then, the head unit itself would cost at least 100, whereas a simple USB powered dongle with just line-out and minimal processing I think could easily be made and sold for maybe 50 to max out bluetooth quality, and it would be easy to take with me to another car rather than having to break down the dash just to get the head unit out.
Personally I'm eagerly hoping and awaiting for SBC HD (aka SBC Dual Channel Audio) to be merged into AOSP and released as part of either Android Q or whatever comes next, as this would increase the max bitrate to 512kbps for all bluetooth devices made since 2007 whereas devices made after 2015 would have effectively any birate they want while using the SBC Codec. Free audio quality upgrade for pretty much all devices, especially those not supporting AptX or better.
For more info see: https://forum.xda-developers.com/android/software-hacking/improve-bluetooth-audio-quality-t3832615
I will likely attempt patching the library myself if rooting ever becomes available for the S9+