Database Info

For the hi-fi headphone/IEM fanatics

With lossless FLAC support and a high quality Wolfson DAC chip, it'll be hardpressed to believe that the SGS isn't a viable media player that sounds good.
One problem noted by several folks and supercurio (from the dev team) is that when a headphone or earphone is plugged in, some kind of messed up EQ is applied.
The EQ goes away though if a line-level device is plugged in.
Also before I found out about supercurio's voodoo sound mod, I felt that the output isn't able to drive my 600ohm headphones loud enough. So I set out to build a headphone amplifier just for this.
Click on pic to view album.
So, who else here does the same?
The iPhone crowd can't be the only folks having all the fun (iPhone 4 iteration announced too O_O).
-Edit-
Ooops, forgot to consider those who wanna start building one.
I used the A47 amp. Uses 2 opamps per channel to enhance current output without resorting to using a buffer chip (most buffers are single buffers which means I'll need to squeeze 3 chips at minimum).
Here's the loot.
http://benfeist.com/a47/
This site explains very well on how the circuit works and goes through the layout and build process step by step.
http://www.headphoneamp.co.kr/ftp/sijosae/Gallery/
Sijosae is quite highly regarded in the DIY headphone amp community for his circuit miniaturization. Look at the A47 section.
For an even simpler circuit, you can try the CMoy amp.
http://tangentsoft.net/audio/cmoy-tutorial/
Really REALLY good stuff, detailed website to get started on the basics of opamp technology for audio amplification.

Can we have the schematics?
Thanks.

Oops sorry, check 1st post!
You wanna build yourself one some time soon?

actually yes.
I'll give it a try.

Grrr, so tempted to build one. Only problem is the size since I wear skinnies most of the time.
Anyways, may look at this again when I find the time. Nice post mate.

it's really cool if you are to stay at home and watch movies or enjoy music
but having that extra appendage in a Velcro strip... not such a great idea to go out anywhere with it

Don't use your 600ohm headphone with a DAP. That is all.

It's actually still pocket friendly unless you wear skinny jeans all the time.
But yeah, now with voodoo analog volume control mod and galaxy tuner, I find less need for the amp especially when I travel light.
But still, even with sensitive 32 ohm IEMs, this amp helps deliver ample current for bass heavy songs.
Sent from my GT-I9000 using XDA App

Bluetooth Firmware Hacking Question

Hello.
I paid attention to where it says "no noobs please" in the hacking section and opted to respect that request.
If at any point you find yourself saying "don't do that. do this." in regards to this thread then note: I know what I want. Either it can be done or it can't. Don't try and point me in some other direction.
That said, here's my issue:
I ride a motorcycle. I bought a bluetooth intercom/interface which fits nicely on the exterior of my helmet for control/safety. The headphones absolutely SUCK, which is why I'm here.
I bought a $100 pair of really nice earbuds + mic. The problem is that their controls are UNDER my helmet and that simply won't do.
What I WANT to do is control my phone with my exterior BT module but listen through my nice new earbuds.
Because both of these bt items are of an audio nature, only one can be connected. So, here I am ... wondering if theirs a solution that isn't a punch line.
I'm willing to hack into the product firmware if someone will openly guide me through the process.
Would that, could that even work?
Fingers crossed.

To clarify,
you have your mobil, which supplies the audio source, i.e. call or music?
you have your nice headphones + mic, which is itself a bluetooth device too
you have your old bluetooth device whose controls you want to use, but not the headphones it supplies?

Yes!
You nailed it.
That is precisely what I want to do.

Well its not impossible, but very unfeasible.
I'm no bluetooth expert, but when playing through some scenarios in my head it would be way to much effort.
I think taking the hardware approach and doing something like soldering the good earphones onto the headpiece with the bluetooth controls, will yield faster and cheaper results.
Ya i pointed you in another direction .
But the software approach just doesn't work very well, especially as the firmware on both bluetooth devices is most likely closed source, additionaly they might need hardware changes too, to be even modifyable software wise.

@RobinDean
The quickest and easiest way is the swap out the bad sounding speaker unit and replace with something better. Buy some ebay or whatever, not expensive .
While remembering Bluetooth transmission via SBC codec has few different bitrate of transmission, low is bad and high is relatively acceptable, plus internal DSP etc etc etc, hence you may be lucky they are using high bitrate and stereo.
Your post more than 2 years ago, probably you moved on, got better products and skip all this entirely.

[Q] FM Transmitter? A good one that works well?

So I bought an FM Transmitter for a co-worker, looked simple, had a review or two on it, but when it got here, it sucked. Sounded distant, had a large echo, and also sounded like the left or right side wasn't being heard? We attempted almost every empty fm station you could think of to shun interference as a factor. No dice. If any of you have purchased one that doesn't suck i'd like to know about it.
Sent from my SPH-D700 using xda premium

http://www.amazon.com/FlexSMART-Transmitter-Hands-Free-Blackberry-Smartphones/dp/B003PPGOC0
I purchased this last year and it has the best FM transmitting quality i've heard. The rest suck. This is advertised as bluetooth, but has an aux input so you can plug in via your headphone jack

bighuta said:
http://www.amazon.com/FlexSMART-Transmitter-Hands-Free-Blackberry-Smartphones/dp/B003PPGOC0
I purchased this last year and it has the best FM transmitting quality i've heard. The rest suck. This is advertised as bluetooth, but has an aux input so you can plug in via your headphone jack
Click to expand...
Click to collapse
Does that have battery power? I have two FM transmitters, one that costs like $2 and is a strange no name Chinese one that works great but only on a few commonly used frequencies at the end of the spectrum. I have a Belkin one that lets me transmit on any frequency but is only usable less than an inch from the antenna. I might want to purchase this but the battery aspect would be a deal breaker.

Tomcat5 said:
Does that have battery power? I have two FM transmitters, one that costs like $2 and is a strange no name Chinese one that works great but only on a few commonly used frequencies at the end of the spectrum. I have a Belkin one that lets me transmit on any frequency but is only usable less than an inch from the antenna. I might want to purchase this but the battery aspect would be a deal breaker.
Click to expand...
Click to collapse
it plugs directly into the cigarette plug. didnt you even check the link?

bighuta said:
it plugs directly into the cigarette plug. didnt you even check the link?
Click to expand...
Click to collapse
Yeah and I didn't see anything about battery power on it. I carry mine with me since they have batteries.
Sent from my Phone with an App

Tomcat5 said:
Yeah and I didn't see anything about battery power on it. I carry mine with me since they have batteries.
Sent from my Phone with an App
Click to expand...
Click to collapse
The transmitting power on this item is really strong and clean, unless your antenna is really broken, it will pick up the signal. The battery powered ones are total trash compared to this, since it draws its power from the car itself.

fm transmitter
Shinydude100 said:
So I bought an FM Transmitter for a co-worker, looked simple, had a review or two on it, but when it got here, it sucked. Sounded distant, had a large echo, and also sounded like the left or right side wasn't being heard? We attempted almost every empty fm station you could think of to shun interference as a factor. No dice. If any of you have purchased one that doesn't suck i'd like to know about it.
Sent from my SPH-D700 using xda premium
Click to expand...
Click to collapse
Some times happen Like this. Because Sound problem are depend on manufacturing. Due to this reason signal-to-noise ratio (SNR) and frequency response become less or more,Because in manufacturing company used different type's of materials. If we used P-Type silicon materials then it's create sound problem, I hope you understand. Thanks

USB-C Port - Headphone Audio Quality ?

Hi.
I'm holding off on pre-ordering until I see some real world reviews.
A must have for me is very good headphone audio quality. I did have high hopes since the phone is made by HTC who have have a good reputation using dedicated quality DACs in their phones previously.
I can't find any information on the internet describing what to expect form an audio perspective apart from the dual speakers which don't really interest me.
Since the phone delivers audio over the USB-C port via a digital signal, am I correct in saying there will be no on-board DAC and sound quality will be solely driven by the headphones or/and the 3.5mm converter which contains something to decode the digital signal?
In-short, is the Pixel 2 Headphone audio likely to be inferior to something like the HTC 10 for example?

owens2000 said:
Hi.
I'm holding off on pre-ordering until I see some real world reviews.
A must have for me is very good headphone audio quality. I did have high hopes since the phone is made by HTC who have have a good reputation using dedicated quality DACs in their phones previously.
I can't find any information on the internet describing what to expect form an audio perspective apart from the dual speakers which don't really interest me.
Since the phone delivers audio over the USB-C port via a digital signal, am I correct in saying there will be no on-board DAC and sound quality will be solely driven by the headphones or/and the 3.5mm converter which contains something to decode the digital signal?
In-short, is the Pixel 2 Headphone audio likely to be inferior to something like the HTC 10 for example?
Click to expand...
Click to collapse
My understanding is all device currently out that uses USB C still sends an analog signal because it is still handled by an internal DAC. The Pixel 2 doesn't use an Internal DAC to push the signal and the adapter has a DAC inside of it to convert the signal. You can't by a pass through or it won't work. Apple current devices you can use any as long as it is supported, and some of them don't have DAC's inside. I actually think internal DAC's so be on the way out and it should drop the costs of devices. There's a lot better DACs out there, and are universal you can get the sound you want when you find the one for you. I prefer to not have a huge list of things just to buy a phone. I'd rather have like 5 things I am looking for and the rest I already have in my pocket if you know what I mean?
Someone told me that the iPhone adapter has a DAC in it but after seeing it I am a bit skeptical. I think it's their anti-cheap cable chip thing which is supposed to go into all cables to be certified by Apple.

Actually HTC devices without a jack only output digital audio, and I'm 99.9% certain the Essential is the same. Both of their adapters contain DACs and amps (I read an explicit statement from Essential that this was the case), and we know the HTC adapter works with the Essential phone. I don't know about Motorola; I've read there are compatibility problems between their adapters and some other manufacturers, but that may be because not everyone is applying the digital audio standard correctly rather than one being analogue.
Unlike USB-C Apple's Lightning port has no analogue outputs, so their adapter must have a DAC in it. Since they are using custom chips they may have integrated it with some of the other functions (same as the Qualcomm SoCs contain a DAC as well).
As for the original question, is the Pixel 2 wired headphone output likely to be inferior to a phone with a headphone jack: it will depend on the quality of the DAC and amp in the adapter you use (and we'll include "external USB DAC" as an "adapter" for this discussion). If the Google adapter is inferior it should be possible to find a better one (with more options as phones using this standard become more common). At this point I don't think anyone has any idea what the quality from the bundled adapter will be, though using the HTC 10 as your reference you set the standard higher than most phones with a jack (and certainly higher than the first generation Pixel). I've bought a HTC adapter to test with the Pixel 2, and assuming it is compatible I'll do some comparisons between that and the Google one when I have time (I won't be completely surprised if they turn out to be the same thing in different packages though, given HTC's involvement in the Pixels).

Large Hadron said:
Actually HTC devices without a jack only output digital audio, and I'm 99.9% certain the Essential is the same. Both of their adapters contain DACs and amps (I read an explicit statement from Essential that this was the case), and we know the HTC adapter works with the Essential phone. I don't know about Motorola; I've read there are compatibility problems between their adapters and some other manufacturers, but that may be because not everyone is applying the digital audio standard correctly rather than one being analogue.
Unlike USB-C Apple's Lightning port has no analogue outputs, so their adapter must have a DAC in it. Since they are using custom chips they may have integrated it with some of the other functions (same as the Qualcomm SoCs contain a DAC as well).
As for the original question, is the Pixel 2 wired headphone output likely to be inferior to a phone with a headphone jack: it will depend on the quality of the DAC and amp in the adapter you use (and we'll include "external USB DAC" as an "adapter" for this discussion). If the Google adapter is inferior it should be possible to find a better one (with more options as phones using this standard become more common). At this point I don't think anyone has any idea what the quality from the bundled adapter will be, though using the HTC 10 as your reference you set the standard higher than most phones with a jack (and certainly higher than the first generation Pixel). I've bought a HTC adapter to test with the Pixel 2, and assuming it is compatible I'll do some comparisons between that and the Google one when I have time (I won't be completely surprised if they turn out to be the same thing in different packages though, given HTC's involvement in the Pixels).
Click to expand...
Click to collapse
Thanks for your reply and I look forward to reading your findings.
I must say, I find this whole trend towards usb-c driven headphones not exactly consumer friendly. I've not seen a strong enough argument by any of the manufacturers to justify the change, rather than reclaiming space to cram in other tech. Having to carry around an adapter as well as my existing headphones is just plain inconvenient.
Had Google included a pair of quality usb-c buds in the package with the Pixel 2 (and an adapter) while promoting a better than average audio experience (as per the HTC 10) that would have been enough for me to commit and pre-order without hesitation. Perhaps I'm not the typical mobile user these days whose priority, after the basic capability of making a phone call is to listen to quality audio.

You will probably can get a better DAC than the one generally included in the phones SoC.
Any small DAC should have a similar quality to phones DAC.
Now the Type C is strong. I can even power a Fulla 2 DAC/AMP with my 6P.
Sent from my Nexus 6P

One of the reviews I've read today (can't remember which) stated that the HTC adapter does work with the Pixel 2. That's a positive sign with regards to standards, which is what's needed if we're to have more options.

So, any news about this topic?

I've been using the Pixel 2 since Thursday and the audio with the dongle is fine. If audio quality is really important, then get an external DAC. I have a Fiio E18 and the quality is exceptional.
Without decent headphones the audio output method is almost meaningless, especially if you use earbuds.
I recently got a pair of Audeze EL-8 Over Ear, Closed Back headphones and the audio from the Pixel 2 with or without the DAC is excellent (better with, of course).

The audio with the dongle is absolutely terrible. I spent some time listening to it this morning and was appalled at the quality. So much so that I came here specifically looking for a solution.

Blown 89 said:
The audio with the dongle is absolutely terrible. I spent some time listening to it this morning and was appalled at the quality. So much so that I came here specifically looking for a solution.
Click to expand...
Click to collapse
The solution is an external DAC: Audioquest DragonFly Black or Red are absolute hit.

https://www.phonearena.com/phones/Google-Pixel-2-XL_id10568/benchmarks
They said in the presentation that the dongle includes a DAC (I remember hearing it, please correct me if I'm wrong) Apparently the Pixel 2 sounds louder than most phones, close to iPhones. Don't know about the quality though...

omarfarrah said:
https://www.phonearena.com/phones/Google-Pixel-2-XL_id10568/benchmarks
They said in the presentation that the dongle includes a DAC (I remember hearing it, please tell me if I'm wrong) Apparently the Pixel 2 sounds louder than most phones, close to iPhones. Don't know about the quality though...
Click to expand...
Click to collapse
Yes, it will contain a DAC. It uses USB-C digital audio, so with the output being digital there must be a DAC in order to produce the analogue waveform needed by your headphones. The same is true for most if not all phones using USB-C audio (certainly the HTC U11 and Essential PH-1, and I've read others confirm that the HTC adapter works with both the Essential and the Pixel 2).

I've had the pixel 2 xl for a few days now. I've used my regular headphones through the usbc dongle. It worked ok the first time I tried it. But last night I couldn't get any sound through it. So I unplugged and replugged it back it. The dongle was really warm. I rebooted and tried it again. The audio did finally come through but there was a lot of static and again the dongle was uncomfortably warm.
Fidgiting with it seemed to change the audio but it was very finicky. Hoping it was just the dongle.

Blown 89 said:
The audio with the dongle is absolutely terrible. I spent some time listening to it this morning and was appalled at the quality. So much so that I came here specifically looking for a solution.
Click to expand...
Click to collapse
That is so disappointing. Do you think it might be dodgy dongle and have you asked Google for a replacement?
Can others confirm if the above is also your experience?

owens2000 said:
That is so disappointing. Do you think it might be dodgy dongle and have you asked Google for a replacement?
Can others confirm if the above is also your experience?
Click to expand...
Click to collapse
I was listening to some music I loaded at the Verizon store. Comparing it to the V30 made it sound even worse. I have a friend that's an audio engineer that tested his. His comments were "finicky trying to get it to work, once it does....sounds like garbage. would be fine for a podcast or probably mostly youtube content, but music blows."
FWIW I was listening with Futuresonic G10's

I have no idea what people here are tripping on when they say audio quality from the dongle sucks?? Maybe they have a defective piece. Just compared sound from my s7 with viper vs pixel, and obviously the s7 sounded better cuz, it has viper on it but honestly couldnt complain about the sound of the pixel. No way it was close to being terrible, no WAY. It was almost the same,once viper comes and a few tweaks are made, it will be just as good or very close to it. I tested with samsung headphones and even sennheiser over the ear headphones fwiw

BTW. They RMA'd the phone, when I told them about the dongle heating up.
Hopefully the next one will be better.

owens2000 said:
That is so disappointing. Do you think it might be dodgy dongle and have you asked Google for a replacement?
Can others confirm if the above is also your experience?
Click to expand...
Click to collapse
It is not my experience. Audio seems fine.

94wolfpack said:
BTW. They RMA'd the phone, when I told them about the dongle heating up.
Hopefully the next one will be better.
Click to expand...
Click to collapse
Interesting. I'd have thought it would have been cheaper to send you a replacement dongle and see whether that fixed it, and replace the phone if not.

Blown 89 said:
The audio with the dongle is absolutely terrible. I spent some time listening to it this morning and was appalled at the quality. So much so that I came here specifically looking for a solution.
Click to expand...
Click to collapse
I have the opposite experience. I download my Spotify library using the "extreme quality" setting enabled. Not sure what technical quality "extreme" is, but listening to The Beatles white album was amazing and sounded great. Could hear all the nuances, highs and lows.

Question Calling All JOYING Snapdragon and Android 10 Head Unit Users! Seeking Experience Stories and Answers to Questions! Prospective Buyer!

Hey everyone! I am brand new to this forum and joined because I saw the most quality forum threads on the Joying head unit line of products here than any other forum I could find. I have a 2000 Chevrolet Corvette that I am hoping to install an 8" Joying Snapdragon radio in and could use some help gaining legitimate reviews and maybe some answers for questions I have regarding the Snapdragon and other Joying products. I'll number the talking points below for anyone willing to contribute and help me out. Thanks!
1) How is the Joying Snapdragon product that you have experience with, EXCLUDING all experiences pertaining to steering wheel controls? the C5 did not offer steering wheel controls, so I'm out of luck for that luxury.
2) How bright are the screens? Given the radio location in my car, glares when the roof is on is very unlikely, but a brighter screen is always better and would help if I chose to use the radio while the top is off and the sun can shine in almost directly onto it.
3) This is a very, very niche inquiry, but does anyone have a Joying snapdragon or android 10 head unit happen to also own an Xbox 1 or newer? If so, could you please tell me if you can download the Xbox app from the Google Store and install it on the radio? Furthermore, if this can be accomplished, can you please see if it is possible to Remote Play your Xbox on the Joying head unit via the Xbox app? The way I am thinking about it, doing this would require you to pair a wireless Xbox remote to the head unit via Bluetooth and then having the radio connected to WiFi (hotspot or sim-card, I suppose), OR it might work with a USB-wired remote connected to the radio via the USB port(?). I wouldn't be playing games while driving, but it would be something very cool to do at things like car meets or whatever. IF someone tries this, AND it works... how is it?
4) I see a lot of reviews in certain places here and there that say the Joying head units really don't offer any improvement over factory radios. Can someone please school me on this? A Best Buy employee told me once that almost all aftermarket radios (grant it, he was referring to Kenwoods, Alpines, etc.) will inherently improve the sound (either by volume or quality) over the factory radio because the aftermarket units "push" more power (in watts?) than factory units. I've replaced the factory Bose "twiddler" speakers in my car with aftermarket JBL speakers that can be found at Best Buy, so I'm hoping the Joying Snapdragon can make the most of them. Other than that, my car's sound system remains the same.
5) Does anyone happen to also have experience with these units and their communication/compatibility with the OBD2 adapter? Joying offers a deal to get their wireless OBD2 device, which I assume may be used on apps like Torque and such. Furthermore, does anyone think you could buy an OBD2-to-USB cable and run a wired connection to the radio for a faster, more responsive reading when using apps like Torque to view engine and ECU data?
Thank you to everyone who chimes in! I really appreciate it and I hope to hear from you all soon.

Chris Laymon said:
Hey everyone! I am brand new to this forum and joined because I saw the most quality forum threads on the Joying head unit line of products here than any other forum I could find. I have a 2000 Chevrolet Corvette that I am hoping to install an 8" Joying Snapdragon radio in and could use some help gaining legitimate reviews and maybe some answers for questions I have regarding the Snapdragon and other Joying products. I'll number the talking points below for anyone willing to contribute and help me out. Thanks!
1) How is the Joying Snapdragon product that you have experience with, EXCLUDING all experiences pertaining to steering wheel controls? the C5 did not offer steering wheel controls, so I'm out of luck for that luxury.
2) How bright are the screens? Given the radio location in my car, glares when the roof is on is very unlikely, but a brighter screen is always better and would help if I chose to use the radio while the top is off and the sun can shine in almost directly onto it.
3) This is a very, very niche inquiry, but does anyone have a Joying snapdragon or android 10 head unit happen to also own an Xbox 1 or newer? If so, could you please tell me if you can download the Xbox app from the Google Store and install it on the radio? Furthermore, if this can be accomplished, can you please see if it is possible to Remote Play your Xbox on the Joying head unit via the Xbox app? The way I am thinking about it, doing this would require you to pair a wireless Xbox remote to the head unit via Bluetooth and then having the radio connected to WiFi (hotspot or sim-card, I suppose), OR it might work with a USB-wired remote connected to the radio via the USB port(?). I wouldn't be playing games while driving, but it would be something very cool to do at things like car meets or whatever. IF someone tries this, AND it works... how is it?
4) I see a lot of reviews in certain places here and there that say the Joying head units really don't offer any improvement over factory radios. Can someone please school me on this? A Best Buy employee told me once that almost all aftermarket radios (grant it, he was referring to Kenwoods, Alpines, etc.) will inherently improve the sound (either by volume or quality) over the factory radio because the aftermarket units "push" more power (in watts?) than factory units. I've replaced the factory Bose "twiddler" speakers in my car with aftermarket JBL speakers that can be found at Best Buy, so I'm hoping the Joying Snapdragon can make the most of them. Other than that, my car's sound system remains the same.
5) Does anyone happen to also have experience with these units and their communication/compatibility with the OBD2 adapter? Joying offers a deal to get their wireless OBD2 device, which I assume may be used on apps like Torque and such. Furthermore, does anyone think you could buy an OBD2-to-USB cable and run a wired connection to the radio for a faster, more responsive reading when using apps like Torque to view engine and ECU data?
Thank you to everyone who chimes in! I really appreciate it and I hope to hear from you all soon.
Click to expand...
Click to collapse
From reading the forums what learnings do you have regarding FYT based chinese origin head units so far?
Your post reads like solicitation - the information is here for you to read.

marchnz said:
From reading the forums what learnings do you have regarding FYT based chinese origin head units so far?
Your post reads like solicitation - the information is here for you to read.
Click to expand...
Click to collapse
So, like I said, I'm new to this forum and, admittedly, I didn't look into the existence of any community guidelines that this post might violate, such as the solicitation you think my post reads as. If that's the case, I understand it if you choose to remove my post. I am probably wrong to assume that this forum is similar to car forums in that a user may post a thread whether to distribute or obtain information. For example, in the Corvette forums I use, I can post a thread about a new exhaust system I put on my car and list some things I liked and dislike about it to help future buyers, or I can ask a question about how other Corvette owners have enjoyed or disliked their experience with an aftermarket seat that I might be interested in. In either of those scenarios, I wouldn't be accused of solicitating because it's kind of the normal thing to do on a forum. So I don't potentially make the same mistake in the future, can you please tell me why my post "reads like solicitation," what the community guidelines (or whatever they are) that I may have violated, and what you mean by "the information is here for you to read?" For example, am I not allowed to post questions here?
However, I can't post a question like this on the Corvette forums because 99% of the boomers on there only buy "American, REAL QUALITY" aftermarket radios and never give android head units a chance. The other 1% seem to use the Joying 8.8" head unit because they want to retain the factory radio bezel. So, nobody over there is doing what I'm thinking of doing, so I'm coming to the only forum I found where users post information about the Joying unit.
But, to answer your question about what I've learned, I saw and read a thread started by @tRidiot under the "FYT Android Head Units" category that was titled "Do not buy a Joying Snapdragon unit - actually, Joying's customer service in general pretty well sucks." which can be found here: https://forum.xda-developers.com/t/...service-in-general-pretty-well-sucks.4419619/ .
By reading this thread, I learned that @tRidiot had a really sour experience with Joying's customer service and was thoroughly disappointed with the way the radio interfaced with the steering wheel control canbus system (or whatever its called). So, I learned to not have any high expectations for the Joying product line to interface well with steering wheel controls. I've also read Facebook posts about this issue being consistent in other user experiences. As stated in my original post, I'm not really concerned with steering wheel controls because my car doesn't have any.
I also read a thread by @lowridincrew, with no title, in the category "Android head-units," that talks about the snapdragon product line by joying and compares it to their previous models. What i learned there is that the hardware in the snapdragon products doesn't seem to be as competitive (or fast or as powerful, etc.) as their less expensive products. It seems like some of those who commented on that thread have purchased a Snapdragon product and, in first impressions, seem to be okay with it. There seems to be an appeal for the new UI and that older models most likely won't be given the updated UI.
I've also tried to reach out to a YouTuber, SaabUnleashed, as he has done several android head units including the Joying Snapdragon, but he has not responded.
SO, that is all the information I have learned by reading threads on this forum. I would still appreciate any and all contributions that pertain to answering the questions listed above, and if I need to take my questions elsewhere, please tell me where I need to take them. Thanks!

Chris Laymon said:
Hey everyone! I am brand new to this forum and joined because I saw the most quality forum threads on the Joying head unit line of products here than any other forum I could find. I have a 2000 Chevrolet Corvette that I am hoping to install an 8" Joying Snapdragon radio in and could use some help gaining legitimate reviews and maybe some answers for questions I have regarding the Snapdragon and other Joying products. I'll number the talking points below for anyone willing to contribute and help me out. Thanks!
1) How is the Joying Snapdragon product that you have experience with, EXCLUDING all experiences pertaining to steering wheel controls? the C5 did not offer steering wheel controls, so I'm out of luck for that luxury.
2) How bright are the screens? Given the radio location in my car, glares when the roof is on is very unlikely, but a brighter screen is always better and would help if I chose to use the radio while the top is off and the sun can shine in almost directly onto it.
3) This is a very, very niche inquiry, but does anyone have a Joying snapdragon or android 10 head unit happen to also own an Xbox 1 or newer? If so, could you please tell me if you can download the Xbox app from the Google Store and install it on the radio? Furthermore, if this can be accomplished, can you please see if it is possible to Remote Play your Xbox on the Joying head unit via the Xbox app? The way I am thinking about it, doing this would require you to pair a wireless Xbox remote to the head unit via Bluetooth and then having the radio connected to WiFi (hotspot or sim-card, I suppose), OR it might work with a USB-wired remote connected to the radio via the USB port(?). I wouldn't be playing games while driving, but it would be something very cool to do at things like car meets or whatever. IF someone tries this, AND it works... how is it?
4) I see a lot of reviews in certain places here and there that say the Joying head units really don't offer any improvement over factory radios. Can someone please school me on this? A Best Buy employee told me once that almost all aftermarket radios (grant it, he was referring to Kenwoods, Alpines, etc.) will inherently improve the sound (either by volume or quality) over the factory radio because the aftermarket units "push" more power (in watts?) than factory units. I've replaced the factory Bose "twiddler" speakers in my car with aftermarket JBL speakers that can be found at Best Buy, so I'm hoping the Joying Snapdragon can make the most of them. Other than that, my car's sound system remains the same.
5) Does anyone happen to also have experience with these units and their communication/compatibility with the OBD2 adapter? Joying offers a deal to get their wireless OBD2 device, which I assume may be used on apps like Torque and such. Furthermore, does anyone think you could buy an OBD2-to-USB cable and run a wired connection to the radio for a faster, more responsive reading when using apps like Torque to view engine and ECU data?
Thank you to everyone who chimes in! I really appreciate it and I hope to hear from you all soon.
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I can answer question #4 as I've dealt with high end Kenwoods, Pioneers etc. It does improve sound and the person that said it's not any improvement over factory radios are delusional. The android radios offer a crossover and wide band EQ's. That alone improves sound quality a ton. I have a 08 Lacrosse and I've went from Factory to Kenwood DMX7704S to a Joying 4GB - 64GB 7 inch head unit. The Joying had way more control over the Kenwood. Whoever got in my car thought I had a amplifier installed but it was just my Headunit. I was able to fine tune it nicely. The only issues would be when adding a amplifier, either use the factory cables to go back to RCA cables straight to the amp or a crossover. The RCAs tend to be 1v and under as my Kenwood had 4v which makes a huge difference.

Chris Laymon said:
Hey everyone! I am brand new to this forum and joined because I saw the most quality forum threads on the Joying head unit line of products here than any other forum I could find. I have a 2000 Chevrolet Corvette that I am hoping to install an 8" Joying Snapdragon radio in and could use some help gaining legitimate reviews and maybe some answers for questions I have regarding the Snapdragon and other Joying products. I'll number the talking points below for anyone willing to contribute and help me out. Thanks!
1) How is the Joying Snapdragon product that you have experience with, EXCLUDING all experiences pertaining to steering wheel controls? the C5 did not offer steering wheel controls, so I'm out of luck for that luxury.
2) How bright are the screens? Given the radio location in my car, glares when the roof is on is very unlikely, but a brighter screen is always better and would help if I chose to use the radio while the top is off and the sun can shine in almost directly onto it.
3) This is a very, very niche inquiry, but does anyone have a Joying snapdragon or android 10 head unit happen to also own an Xbox 1 or newer? If so, could you please tell me if you can download the Xbox app from the Google Store and install it on the radio? Furthermore, if this can be accomplished, can you please see if it is possible to Remote Play your Xbox on the Joying head unit via the Xbox app? The way I am thinking about it, doing this would require you to pair a wireless Xbox remote to the head unit via Bluetooth and then having the radio connected to WiFi (hotspot or sim-card, I suppose), OR it might work with a USB-wired remote connected to the radio via the USB port(?). I wouldn't be playing games while driving, but it would be something very cool to do at things like car meets or whatever. IF someone tries this, AND it works... how is it?
4) I see a lot of reviews in certain places here and there that say the Joying head units really don't offer any improvement over factory radios. Can someone please school me on this? A Best Buy employee told me once that almost all aftermarket radios (grant it, he was referring to Kenwoods, Alpines, etc.) will inherently improve the sound (either by volume or quality) over the factory radio because the aftermarket units "push" more power (in watts?) than factory units. I've replaced the factory Bose "twiddler" speakers in my car with aftermarket JBL speakers that can be found at Best Buy, so I'm hoping the Joying Snapdragon can make the most of them. Other than that, my car's sound system remains the same.
5) Does anyone happen to also have experience with these units and their communication/compatibility with the OBD2 adapter? Joying offers a deal to get their wireless OBD2 device, which I assume may be used on apps like Torque and such. Furthermore, does anyone think you could buy an OBD2-to-USB cable and run a wired connection to the radio for a faster, more responsive reading when using apps like Torque to view engine and ECU data?
Thank you to everyone who chimes in! I really appreciate it and I hope to hear from you all soon.
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1 I've had 3 of the last 4 joying units and if you're okay with tinkering a bit to get it to your liking it's a worthwhile purchase. With a few caveats, you can't use Google assistant to make voice calls and sometimes the radio app starts when you start the stereo
2 the screen is very bright. I used to use one in my BMW convertible and even in direct sunlight I could see the screen. There is also a screen protector for some joying units on Amazon and I believe one is anti glare
3 yes you can install the Xbox app but you'd have to download the apk. The play store won't allow you to.
4 changing the EQ might offer a better experience but don't expect a mind blowing difference
5 you can ONLY use the joying obd2 with joying head units if you want to go the bluetooth route. As far as wired usb Idk but I can't imagine it not working.

Got word from a manufacturer on Aliexpress about one of their units They said the far better Snapdragon 665 versions of HU would possibly come out around June

There's no reason to go with a slower Snapdragon 625 compared to the UIS7812 imo

#1 If you are looking at Joying snapdragon units I believe they are all button less, which not having swc is going to be a pain in the butt as you will have to click on the volume icon and slide the volume up or down, hard to do while driving. But other. Than that it's solid. People complain at the fact that the 625 is an older chipset but this is a head unit not a tablet porformance is more than enough for radio stuff. One other thing people don't look at is LTE bands, the snapdragon units support band 4 and 12 which are big in the T-Mobile network, but i will note my Joying headunit has a 4g issue so haven't been able to experience a fully connected drive currently still going through customer service to rectify this issue.
#2 The screen is bright I haven't had issues with not being able to see the screen content. That being said it glares a lot, my unit being mounted 100% vertically reduces the chances of having glare issues but i can see it being an issue on my Avalon where the screen has a slight angle facing the windshield. When I had a Joying unit in that one glare was impossible to combat making the screen useless around mid day.
#3 you can download any android app as on any android device but you will not be able to pair a controller. I tried pairing my Xbox series x controller for hours, couldn't get it to connect, it seams Joying changes something in the Bluetooth interface that voids being able to access the main Bluetooth settings. For me that would make this point useless. I haven't tested USB connection only Bluetooth.
#4 This can be true. There are a lot of generic android radios for under 100 bucks that use the cheapest audio chips to get a product out and sold. This gives you the Android experience but overlooks the audio experience. Joying on the other hand is fairly expensive for a Chinese company sourcing android radios. The reason for this is they implement higher end components to also improve audio quality, and although it is not on par with high end pioneer or Kenwood's it does compare to radios in it's price range. In most cases if your car has only 4 speakers meaning 1 on each door and no factory amplifier the Joying will improve your sound. If your car has a premium audio system from factory IE. JBL, Bose, mark Levinson ext where you have 8-12 speakers in your car and bypass that with this radio it will sound like crap. It would sound like crap with any radio as factory amplifiers have different impedance and crossovers to compensate for special speaker wiring that your radio won't have. Another thing is if you plan to install a sound system in your vehicle you are told to stay away from these units as they distort at low volumes not allowing you to maximize the audio. Also true of old Joying units, these new ones get pretty close to 3v out of RCA before distortion at around 75-80% volume. I tested them with my DM-RTA. Granted this is not 4v as standard by pioneer, Sony and other headunit manufacturer it should suffice and or can be improved by a 200$ line driver. At 700$ still cheaper than any large manufacturer radio with similar specs as in size and functions like wireless car play And android auto.
#5 This I don't know but would advice to ask and see if you are able to pair a Bluetooth model and phone at the same time.

Thanks everyone for chiming in! I know this is a very dated thread by this point, but I felt like I had a few things worth mentioning in case anyone comes looking for it.
Per Joying's customer service, the snapdragon product line (currently) ONLY allow pairing with JOYING-brand Bluetooth products (i.e. steering wheel controller, TPMS, or the OBDII device) and devices categorized as phones.
I think this is a bummer because, well, I feel like one of the biggest reasons to buy an android head unit over other devices is because of the open-source, "do what you want" liberty that isn't given by its competition. This also stinks because it means that a device like an Amazon Echo Auto cannot be used at all -- this device would allow hands-free navigation or music, etc., but it requires a Bluetooth or AUX connection, both of which Joying does not seem to afford for the snapdragon products
I am still going to wait to see how/if the Snapdragon product line is improved as was rumored. I'm also curious to see how Apple's announcement of iOS 16's new and improved Apple CarPlay will change on these devices.
I don't want to discount Joying as a consideration when selecting a head unit -- as of now, I think they are the only brand to offer an 8" all-screen option. I think I still want to go with an android head unit, but I may find myself switching to a different brand or even non-android based unit.

I think @surfer63 wrote about fyt units needing to install obdII before any other Bluetooth devices like cell phones. He has really taken the time to post great info about these units, it just takes a little time and more knowledge than I have to sift through the info and determine if it applies to your unit. I have the hengcheng pro S9.

Chris Laymon said:
Thanks everyone for chiming in! I know this is a very dated thread by this point, but I felt like I had a few things worth mentioning in case anyone comes looking for it.
Per Joying's customer service, the snapdragon product line (currently) ONLY allow pairing with JOYING-brand Bluetooth products (i.e. steering wheel controller, TPMS, or the OBDII device) and devices categorized as phones.
I think this is a bummer because, well, I feel like one of the biggest reasons to buy an android head unit over other devices is because of the open-source, "do what you want" liberty that isn't given by its competition. This also stinks because it means that a device like an Amazon Echo Auto cannot be used at all -- this device would allow hands-free navigation or music, etc., but it requires a Bluetooth or AUX connection, both of which Joying does not seem to afford for the snapdragon products
I am still going to wait to see how/if the Snapdragon product line is improved as was rumored. I'm also curious to see how Apple's announcement of iOS 16's new and improved Apple CarPlay will change on these devices.
I don't want to discount Joying as a consideration when selecting a head unit -- as of now, I think they are the only brand to offer an 8" all-screen option. I think I still want to go with an android head unit, but I may find myself switching to a different brand or even non-android based unit.
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You still don't appear to understand that there is no "joying" headunit. Your comments apply to a factory type sold by a seller called JOYING.
Without posting the details of the unit from Android system information including the MCU, the comments lack context which may mislead others.