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Android Headunit for Hyundai I30 GDH (2015) - car integration

Iam having a look at some of the units for my 2015 Hyundai i30 cw. Namely two variants both with this features:
- 1024 resolution screen
- adapted to hyundai design
- quad core processor
Example for variant A
aliexpress.com/item/2din-Car-Radio-GPS-Navigation-Ipod-MP3-Bluetooth-USB-Capacitive-Touchscreen-Map-WIFi-on-Android-4/1889240271.html?ws_ab_test=searchweb201556_2,searchweb201644_0_79_78_77_82_80_62,searchweb201560_1
Example for variant B
aliexpress.com/item/1024-600-Quad-Core-2-din-7-Android-4-4-Car-Stereo-Radio-dvd-gps-for/32517997140.html?ws_ab_test=searchweb201556_2,searchweb201644_0_79_78_77_82_80_62,searchweb201560_1
Question
- Is there a way to use the car build in microphone with one of this units. If so how?
- Do you have one of those units? What is your feedback?

pr10dr said:
Iam having a look at some of the units for my 2015 Hyundai i30 cw. Namely two variants both with this features:
- 1024 resolution screen
- adapted to hyundai design
- quad core processor
Example for variant A
aliexpress.com/item/2din-Car-Radio-GPS-Navigation-Ipod-MP3-Bluetooth-USB-Capacitive-Touchscreen-Map-WIFi-on-Android-4/1889240271.html?ws_ab_test=searchweb201556_2,searchweb201644_0_79_78_77_82_80_62,searchweb201560_1
Example for variant B
aliexpress.com/item/1024-600-Quad-Core-2-din-7-Android-4-4-Car-Stereo-Radio-dvd-gps-for/32517997140.html?ws_ab_test=searchweb201556_2,searchweb201644_0_79_78_77_82_80_62,searchweb201560_1
Question
- Is there a way to use the car build in microphone with one of this units. If so how?
- Do you have one of those units? What is your feedback?
Click to expand...
Click to collapse
I can answer for I40 and the only way to get a descent Bluetooth is to modify the HU according
to the specific thread in this forum. Both HU's carry the same problem.
Be careful when you order to get the correct screen ie. 1024. They sometimes specify it as optional.
Also verify if you have a factory amplifier. If you have, you need another loom and an analog/SPDIF box.
They are cheap compared to the big guy's, so don't expect miracles. They still work.
I've four units for different cars similar to yours.

Can you point out the thread with the HU modification that improves Bluetooth?
The original Hyundai amplifier only takes spdif as an input? Intresting i dont see other i30 owners which use an android HU mention that.
You are right on the optional 1024 (usually extra 25$).
Iam most intrested not in the bluetooth mobile -> head unit connection but more in getting the audio from the original mic (just above the drivers head) connected to the HU. I feel this way i have less of the aftermarked look (additional mic) and also better audio since the original mic is pretty much in the perfect spot.
I guess i can solder whatever connection the original mic has to my headunit. But there might electrical issues or the mic cable be part of some strange car bus system which will it make hard to figure outand connect.

I don't have a hyundai, but I've put aftermarket units in 2 different cars w/ mics and both had the same problem - they are active mics that have noise cancelling & can't be used w/ these HUs. BUT, you can still easily disconnect the microphone from where it is located and put the aftermarket external mic in its place. My car is a 2014 mazda 6, and my OEM mic was in my overhead where my dome lights are. The panel was held in by 2 screws where the sunglasses drop down. I drop those 2 screws, disconnect the mic from its connector, and pull the mic out (it had some weak adhesive around it, very easy to take out). I then ran my external mic up my a-pillar and mounted it exactly where my factory mic was located. Sound quality is very good, everyone can still hear me okay. and everything looks stock.
Just buy a unit w/o BT issues (avoid MTCB units unless they have fixed this... others seem okay).

Are the units in my original post MTCB units?
What is the reason the active noise canceling microphones can not be used?

pr10dr said:
Are the units in my original post MTCB units?
What is the reason the active noise canceling microphones can not be used?
Click to expand...
Click to collapse
I didn't check your links so you'll have to check for yourself. An active mic will need to be powered, so you'll need to know the correct voltage and supply it somehow. I doubt it's 12V that you can use directly from the unit but you never know. Read it with a meter.
I guess theoretically you could make it work in that case.
Sent from my HTC One M8 using Tapatalk

"seicane" aliex - PX3 7.1.2 Bluetooth music A2DP quality poor

Hi guys..
Well first of all how I wish I'd checked these forums first before buying as I wouldn't have, second I wish I'd at least bought from the UK as I'd get some support. But hey ho I didn't and I'm stuck with it as returning to china seems to risky after the message suggested returning at a value of $70 so they don't get taxed and also making sure its sent by EMs so it doesn't get lost in transit like many units do at customs!!
So I bought what seemed to be an all singing all dancing unit from seicane store on ali express, for my seat ibiza mk5. According to the system info via root check app it's a px3, 7.1.2 android, rock chip, rk30sdk.
Amongst many other problems my main one is the Bluetooth audio quality over A2DP is horrendous, and it's not an amp problem as over aux or USB it's perfect. I've been looking at airplay using air bubble app and personal hotspot but it's too long to load and unstable I only drive 15 min to work so just want fast music to my ears! I've considered getting a Bluetooth transmitter and sticking it in the aux input but not ideal.
Anyone got suggestions as to what the issue may be and if it can be resolved?
Thanks in advance hope I can get this stable one day!

mine is also horrendous, and I also have a very short drive. Connecting a hotspot and launching app and getting a song, takes just too long for me. I'm basically already at my destination by the time I get it up. My workaround was to do what you said, and get a bluetooth transmitter and sticking to the aux, because aux sounds fine, but just bluetooth over a2dp sounds so bad, and has this distorted high end sound. This solution worked for me for awhile, but the only downside is you don't get song information on the head unit to display, which is a tad annoying for me.
I've contacted my radios reseller, and they're just ridiculously helpless, all they do is keep sending me a "software" update to fix it, but it does nothing. I've been searching for over a year for a solution, but have found nothing to fix it, other than what I just said. Problem was still there even when I used custom roms. SO I don't really think its a software issue, maybe some kind of hardware I can replace or modify, but I just really have no clue.

davidgotmilk said:
mine is also horrendous, and I also have a very short drive. Connecting a hotspot and launching app and getting a song, takes just too long for me. I'm basically already at my destination by the time I get it up. My workaround was to do what you said, and get a bluetooth transmitter and sticking to the aux, because aux sounds fine, but just bluetooth over a2dp sounds so bad, and has this distorted high end sound. This solution worked for me for awhile, but the only downside is you don't get song information on the head unit to display, which is a tad annoying for me.
I've contacted my radios reseller, and they're just ridiculously helpless, all they do is keep sending me a "software" update to fix it, but it does nothing. I've been searching for over a year for a solution, but have found nothing to fix it, other than what I just said. Problem was still there even when I used custom roms. SO I don't really think its a software issue, maybe some kind of hardware I can replace or modify, but I just really have no clue.
Click to expand...
Click to collapse
Yeh I've ruled out airplay as an option,
you've got me interested though as you're in a similar boat as me so hopefully can help, do you have the exact same unit for an ibiza or?
And yes thats exactly whats annoying me not getting track info, may as well just use the original head unit if i get a bluetooth transmitter!! which transmitter did you get? i've got a really cheap basic one years old and its got a high pitched whining noise in between song skips so its there just muffled out by songs playing, I'm wondering if thats probably just a cheap receiver I've got..
I'll try get somewhere with the hardware see about a new bluetooth module but no idea on the interface would be total guess work and risky at that, not even sure how to safely root this one.
Other issues i'm having which may be common and you may know? I got a dash cam which cam with a yellow RCA, an Acc+ wire, a ground wire and a 12V wire.. i don't understand why its got an Acc+ and a 12V, i thought similar things both transmit power just one off the ignition being on only? theres no 12v out wire on the head unit except 'cam pow' which I've tried to no avail. I plan on recording direct to the SD card on the camera.
Subwoofer out, does this work on our units? i bought it because i plan adding a 4 channel amp for F/R speaks and a sub amp for a single sub.. but does the rca not work / no amplifier control over it?!
Cheers hope to get somewhere with this as i feel a bit down that its not all singing all dancing like i expected lol.

i have a Seicane with Android 6.0 already, which I dont really have any problems with, but it is not PX3
however, I do have a Seicane with Android 7.1 on the way that does have a PX3. I'll report back when i get it to see if I have any issues

CadillacMike said:
i have a Seicane with Android 6.0 already, which I dont really have any problems with, but it is not PX3
however, I do have a Seicane with Android 7.1 on the way that does have a PX3. I'll report back when i get it to see if I have any issues
Click to expand...
Click to collapse
your bluetooth quality is as good as aux? i wonder if its a software bug..

joshh1512 said:
your bluetooth quality is as good as aux? i wonder if its a software bug..
Click to expand...
Click to collapse
Well the 6.0 version is totally different hardware

it is a known issue that no one seems to have a fix for. Im having this same issues with my PX5 Dasaita unit and had this issue on a previous Xtrons unit aswell. I believe it is a problem with the bluetooth drives not supporting the higher bitpools of recent bluetooth updates hence the bad quality. Ive even tried installing a USB bluetooth dongle but could not get the unit to recognize it.

roly01 said:
it is a known issue that no one seems to have a fix for. Im having this same issues with my PX5 Dasaita unit and had this issue on a previous Xtrons unit aswell. I believe it is a problem with the bluetooth drives not supporting the higher bitpools of recent bluetooth updates hence the bad quality. Ive even tried installing a USB bluetooth dongle but could not get the unit to recognize it.
Click to expand...
Click to collapse
Well I also have a Dasaita PX5 and I definitely didn't have a problem on that one. I would listen to Bluetooth audio on it pretty regularly.
Quick from Hot Audio did email me and ask about it, saying they had heard complaints, and sent me a new harness, but I haven't needed it

CadillacMike said:
Well I also have a Dasaita PX5 and I definitely didn't have a problem on that one. I would listen to Bluetooth audio on it pretty regularly.
Quick from Hot Audio did email me and ask about it, saying they had heard complaints, and sent me a new harness, but I haven't needed it
Click to expand...
Click to collapse
What email did you contact for hot audio? I have reported the issue but they have made no mentions of a different harness. Thanks

roly01 said:
What email did you contact for hot audio? I have reported the issue but they have made no mentions of a different harness. Thanks
Click to expand...
Click to collapse
Just the default contact
[email protected]

Well i've gone an ordered a car play dongle, so hopefully that will be a solution for good radio and a more functional nav at the same time.
Any tips for the dash cam guys? i ordered the 3 cable power one rather than a usb to keep the slots free.. not sure where i should hook them up to. (12V yellow, Acc+ red, black Grnd), i've only got an acc+ on the back of the harness and ground i made an earth wire to the car. Left the 12v off and it doesn't turn on. but my unit doesn't have a 12v, only acc+ or cam pow.

Got a pic or link to the camera you got?

So i have this camera..
https://www.aliexpress.com/item/140...32812106756.html?spm=a2g0s.9042311.0.0.MXwOS4
and this unit..
https://www.aliexpress.com/item/Aft...32827061575.html?spm=a2g0s.9042311.0.0.MXwOS4
The seller said to connect acc+ to acc+ on the unit, 12v to the cars 12v and grnd to the cars ground. I made an earth for the ground just to a screw towards the rear inside of the dash, but not sure where i'll safely take 12v from? especially with the car having a can bus if i splice any wires that may cause an error? Surely these units put out a 12v signal somewhere?
heres the wiring diagrams... https://ae01.alicdn.com/kf/HTB1z7DmnMn.PuJjSZFk763_lpXaZ.png
Also another Q regarding using an external amplifier for speakers and a sub.. is there an issue with the actual volume sent to the amps and can this be resolved? depending what input i give the head unit the volume differs, aux a lot quieter than usb stick or bluetooth.. but even both of them at volume 30 neither are really very loud where you here the speakers distorting, with a standard radio or branded head unit towards top end the speakers would distort so i can set a 'safe' max limit, my concern is the android head unit will limit the amp? and i've seen no info on rooting these units for viper4audio if that would help.
Thanks
Edit: how would i check if the 'cam-pow' wire is putting out 12v with a multimeter? just hold one probe to the wire and touch a ground point with the other?

BT & USB Support on PX5
Guys,
Sorry to tell you, the ROMS are very stripped down and as a result, the only support will be for the listing of BT modules that are on the main board and only for the ones list in the setup. You will not be able to add an external usb BT module to the head unit, it will not reconize them, and therefor will not work. Same with other USB devices. All support has been stripped out of the firmware. Some of these company's are getting slick enough to modify the firmware even more to only support devices that they sell, locking you into buying there junk. Good Luck! I had a BT problem with a Seicane Head Unit, and tried every possible, BT usb module only to find out what they do. Anyone want to purchase BT usb modules cheap!!!!!!
Seicane PX5:
CPU: 8 core 64-bit CPU Coretex-A53 @ 1.5G
Memory: 3891
Kernel Version: 4.4.93+ [email protected] #263 Wed May 9 09:36:56 CST 2018
Build Number: px5-userdebug 8.0.0 OPR5.170623.007 end.hct.20180515.095719 test-keys
MCU Version: MTCE_KLD_V2.80_1 Mar 1 2018 16:54:22
Model: px5(800x480)
Android version: 8.0.0
Android security patch level: October 5, 2017

Working Android Head Unit combo with USB DAC

Hi there,
I'm still in my internal debate of doing a tablet car install (like Galaxy Tab S2 8 inch) or getting an Android Headunit to avoid all the install struggles.
So I have been looking around on different forums for quite a while to find a REALLY working combo with an Android Head unit on Android 8.0 and a USB DAC. I would prefer an optical out DAC. Have you any positive experiences and suggestions of both models that would fit ?
I'm planning on getting a Sabre ES9010 based DAC or a Sabre ES9010K2M.
Anyone got it working with an head unit ?
By the way, I'm aware of the issues with the volume with the radio and bluetooth. I will be using a MiniDSP 6x8 with it in a MK5 golf.

i work with joying headunit + with sabre u2 dac.
the volume little loud even when i set it to one. ( i also add more step no change)
for bt call i connect a speaker to the internal amp of headunit, for me its better because my external sound processor add delay to the speakers. ( the speaker work on bt call and radio. )
if u have a physical volume is better, u can try Fain volume control v2 or Precise volume to get the volume more dynamic.

RoNeReR said:
i work with joying headunit + with sabre u2 dac.
the volume little loud even when i set it to one. ( i also add more step no change)
for bt call i connect a speaker to the internal amp of headunit, for me its better because my external sound processor add delay to the speakers. ( the speaker work on bt call and radio. )
if u have a physical volume is better, u can try Fain volume control v2 or Precise volume to get the volume more dynamic.
Click to expand...
Click to collapse
You need an Intel based joying unit. They are still being sold. Works!

Thanks for your answers. So I guess any Sabre DAC world work ! Good news.
RoNeReR said:
i work with joying headunit + with sabre u2 dac.
the volume little loud even when i set it to one. ( i also add more step no change)
for bt call i connect a speaker to the internal amp of headunit, for me its better because my external sound processor add delay to the speakers. ( the speaker work on bt call and radio. )
if u have a physical volume is better, u can try Fain volume control v2 or Precise volume to get the volume more dynamic.
Click to expand...
Click to collapse
I guess I can connect both RCA out from HU to DSP swell as the Optical out. It should be quite easy to switch from one input to another and remove the delay compensation probably.
What specific model are you using from joying ?
gtxaspec said:
You need an Intel based joying unit. They are still being sold. Works!
Click to expand...
Click to collapse
What about other models like PX5 that contains 4GB RAM and such ? Sabre DAC are not supposed to work on ARM as well ?

Hypnox99 said:
Thanks for your answers. So I guess any Sabre DAC world work ! Good news.
I guess I can connect both RCA out from HU to DSP swell as the Optical out. It should be quite easy to switch from one input to another and remove the delay compensation probably.
What specific model are you using from joying ?
What about other models like PX5 that contains 4GB RAM and such ? Sabre DAC are not supposed to work on ARM as well ?
Click to expand...
Click to collapse
The problem is the software on the head unit, the 4gb models are made by a different vendor. The PX 2gb units are made by the same vendor as the Intel, so we know the USB devices work well.

gtxaspec said:
The problem is the software on the head unit, the 4gb models are made by a different vendor. The PX 2gb units are made by the same vendor as the Intel, so we know the USB devices work well.
Click to expand...
Click to collapse
Thank you very much for answering me. So alright, I see. But I guess the Intel units present the same following problems like : 44.1khz/16 bit playback max, no knob volume control and some applications playing only through the HU audio chip?
Because if the 44.1khz/16 bit problem is fixable as well as all of the applications can play though the USB Dac (not mentioning radio or bt audio since I don't care of thoses so much) the Android HU will get interesting...
On another note, do theses head unit run smooth for quite while and will get Android updates? I didn't see any of the Intel based shipped with Android 8.
Still in my internal debate of tablet dash install vs Android HU vs Western brands Android Auto capable stereo...
So again thanks a lot

QUOTE-Because if the 44.1khz/16 bit problem is fixable as well as all of the applications can play though the USB Dac (not mentioning radio or bt audio since I don't care of thoses so much) the Android HU will get interesting...
On another note, do theses head unit run smooth for quite while and will get Android updates? I didn't see any of the Intel based shipped with Android 8.
--ENDQUOTE
Firstly I personally don't regard 44khz and 16bit audio as a "problem". It is more than adequate for reproduction in a vehicle with all the other attendant noise sources, especially with a window or sunroof open.
Head unit manufacturers are way way behind other Android tablet and 'phone manufacturers by the order of about 2 years. They are still selling and promoting Kit Kat head units. You probably won't see any Android 8 units for another couple of years, if you are very lucky you may find a Nougat unit to suit your vehicle.
Good hunting, Tony.

vidtek said:
QUOTE-Because if the 44.1khz/16 bit problem is fixable as well as all of the applications can play though the USB Dac (not mentioning radio or bt audio since I don't care of thoses so much) the Android HU will get interesting...
On another note, do theses head unit run smooth for quite while and will get Android updates? I didn't see any of the Intel based shipped with Android 8.
--ENDQUOTE
Firstly I personally don't regard 44khz and 16bit audio as a "problem". It is more than adequate for reproduction in a vehicle with all the other attendant noise sources, especially with a window or sunroof open.
Head unit manufacturers are way way behind other Android tablet and 'phone manufacturers by the order of about 2 years. They are still selling and promoting Kit Kat head units. You probably won't see any Android 8 units for another couple of years, if you are very lucky you may find a Nougat unit to suit your vehicle.
Good hunting, Tony.
Click to expand...
Click to collapse
Ok then, the Android version does not matters that much. Seems like Android 6 is OK. Thanks.
I have been looking around and found that some people can get the HDMI out from a PX3 7.1 HU to a box that will extract the audio and feed it as optical to a DSP. Is this advisable ? I guess the volume knob will work with it and after all it will be "as good" as a USB DAC out. I understood that the problem are the converters before the RCA out...
On a side note I was thinking about Joying Intel Sofia for vw golf, I have found some Android 6 units, but can't seem to find one with HDMI out. Only Xtrons PX3 seem to have HDMI out for the units made specifically for the vw golf.
So if I understand well, when I'm using a USB DAC, only bluetooth audio and radio will go through the RCA out ? Anything else will go through the DAC ? If using on a Sofia Intel.
I have also been looking at Android Audio to USB, something like the MiniDSP USB Streamer, any thoughts ?
Many many questions again

Hypnox99 said:
Ok then, the Android version does not matters that much. Seems like Android 6 is OK. Thanks.
I have been looking around and found that some people can get the HDMI out from a PX3 7.1 HU to a box that will extract the audio and feed it as optical to a DSP. Is this advisable ? I guess the volume knob will work with it and after all it will be "as good" as a USB DAC out. I understood that the problem are the converters before the RCA out...
On a side note I was thinking about Joying Intel Sofia for vw golf, I have found some Android 6 units, but can't seem to find one with HDMI out. Only Xtrons PX3 seem to have HDMI out for the units made specifically for the vw golf.
So if I understand well, when I'm using a USB DAC, only bluetooth audio and radio will go through the RCA out ? Anything else will go through the DAC ? If using on a Sofia Intel.
I have also been looking at Android Audio to USB, something like the MiniDSP USB Streamer, any thoughts ?
Many many questions again
Click to expand...
Click to collapse
Hypnox-
I installed a Joying in mine, a VW EOS, and since doing the Heatsink/fan modification, I have been quite satisfied with it's performance. They supply all the looms and can-bus interface to suit your model car and it is the easiest plug and play install imaginable, takes 5 minutes.
I was in the same position as you, although not as fixated on the sound fidelity I was choosing between a tablet and head unit solution. I am VERY glad I chose the head unit, the finished install looks like an OEM unit and performs with very few hiccups. See the piccies of mine below. The unit I chose was a UK-JY-VM130N2D, it has a digital amplifier and 2 MicroSD card slots on the front (I have used them with up to 128gb MicroSD cards) and most importantly for me a physical volume knob.
Cheers Tony.

vidtek said:
Hypnox-
I installed a Joying in mine, a VW EOS, and since doing the Heatsink/fan modification, I have been quite satisfied with it's performance. They supply all the looms and can-bus interface to suit your model car and it is the easiest plug and play install imaginable, takes 5 minutes.
I was in the same position as you, although not as fixated on the sound fidelity I was choosing between a tablet and head unit solution. I am VERY glad I chose the head unit, the finished install looks like an OEM unit and performs with very few hiccups. See the piccies of mine below. The unit I chose was a UK-JY-VM130N2D, it has a digital amplifier and 2 MicroSD card slots on the front (I have used them with up to 128gb MicroSD cards) and most importantly for me a physical volume knob.
Cheers Tony.
Click to expand...
Click to collapse
I forgot to post a picture of the finished job, see below. Pic 1 is original MFD2 VW unit, pic 2 the Joying.
Tony

This is some nice unit there Thank you for your input ! By the way this is exactly the Sofia Intel based unit I have my eyes on. I will certainly make the same mod as you if I pull the trigger on this one and the integration into the dash is very sexy
I'm still trying to figure out the HDMI out audio extraction if possible on PX3 Xtrons unit... I might send Xtrons a mail, but not sure if they will reply. Also trying to know if spotify can use USB dac for audio out... Damn, finding the "somewhat" good unit is not easy task.

Hypnox99 said:
This is some nice unit there Thank you for your input ! By the way this is exactly the Sofia Intel based unit I have my eyes on. I will certainly make the same mod as you if I pull the trigger on this one and the integration into the dash is very sexy
I'm still trying to figure out the HDMI out audio extraction if possible on PX3 Xtrons unit... I might send Xtrons a mail, but not sure if they will reply. Also trying to know if spotify can use USB dac for audio out... Damn, finding the "somewhat" good unit is not easy task.
Click to expand...
Click to collapse
Hypnox- You seem to be hypnotised (pun intended) by sound quality. I am a video/ audio engineer with 50 years experience. I have installed hundreds of home theatre hif-fi and casino/night club PA systems.
As we age, our hearing deteriorates rapidly from the age of 12 onwards. In today's world with attendant noise pollution, headphone use, aircraft and motor noise and concert visits, our hearing is far worse than previous generations at an earlier age. Most people over 30 will have difficulty hearing any signal over 12,000khz.
There is a hearing testing app in the google play store, https://play.google.com/store/apps/details?id=mobile.eaudiologia&hl=en using headphone/earbuds why don't you check your own hearing before embarking on a quest for excellent sound in your equipment, you could well save yourself a bundle of dosh and a heap of time!
As we age, the viscocity of the fluid in our ears gets thicker, which is why older people hate the boom boom of bass notes youngsters love so much, it literally resounds inside our heads and is painful. Older folks turn up the treble/high equaliser settings in a vain attempt to hear those high notes we once could hear. This in turn is painful to young people who cannot stand high levels of higher frequencies, because they can actually hear them!
When you try to put a high-fidelity sound system into a car environment, you are basically pushing sh*t uphill. As soon as you open a window, all the careful measurements an audio installer makes literally goes out of the window.
My advice, forget hifi in a car, it's is a nonsense. If you must have hifi in your car, use headphones and let someone else do the driving.
Sorry for the lecture, you don't want to get me started on the monster cable and oxygen-free cable rip-offs
Cheers Tony.

vidtek said:
Hypnox- You seem to be hypnotised (pun intended) by sound quality. I am a video/ audio engineer with 50 years experience. I have installed hundreds of home theatre hif-fi and casino/night club PA systems.
As we age, our hearing deteriorates rapidly from the age of 12 onwards. In today's world with attendant noise pollution, headphone use, aircraft and motor noise and concert visits, our hearing is far worse than previous generations at an earlier age. Most people over 30 will have difficulty hearing any signal over 12,000khz.
There is a hearing testing app in the google play store, https://play.google.com/store/apps/details?id=mobile.eaudiologia&hl=en using headphone/earbuds why don't you check your own hearing before embarking on a quest for excellent sound in your equipment, you could well save yourself a bundle of dosh and a heap of time!
As we age, the viscocity of the fluid in our ears gets thicker, which is why older people hate the boom boom of bass notes youngsters love so much, it literally resounds inside our heads and is painful. Older folks turn up the treble/high equaliser settings in a vain attempt to hear those high notes we once could hear. This in turn is painful to young people who cannot stand high levels of higher frequencies, because they can actually hear them!
When you try to put a high-fidelity sound system into a car environment, you are basically pushing sh*t uphill. As soon as you open a window, all the careful measurements an audio installer makes literally goes out of the window.
My advice, forget hifi in a car, it's is a nonsense. If you must have hifi in your car, use headphones and let someone else do the driving.
Sorry for the lecture, you don't want to get me started on the monster cable and oxygen-free cable rip-offs
Cheers Tony.
Click to expand...
Click to collapse
I understand your point of view, I certainly don't have the same Audio background as you.
However I'm 28 and a music producer and I can certainly tell the difference between pairs of monitoring speaker. Through the years (still a lot to learn though) I have developed my hear in mixing sessions. And I have a passion for listening to music as well.
I have replaced the stock HU of my car with a 100$ Sony last year and I can tell straight away the difference in sound quality. I also made an audio car install on another car and the difference between the stock system is stunning.
Here, I just want to have a decent audio quality, I know that in car audio there is some serious diminishing return when you build your system.
If you take a look on XDA and like diymobileaudio, you will find hundreds of threads stating that the audio quality is poor even in a car...
You know, If for 50$ I can get a DAC working pretty well with it and that it won't crush the audio quality, I'm all for it

Hypnox99 said:
I understand your point of view, I certainly don't have the same Audio background as you.
However I'm 28 and a music producer and I can certainly tell the difference between pairs of monitoring speaker. Through the years (still a lot to learn though) I have developed my hear in mixing sessions. And I have a passion for listening to music as well.
I have replaced the stock HU of my car with a 100$ Sony last year and I can tell straight away the difference in sound quality. I also made an audio car install on another car and the difference between the stock system is stunning.
Here, I just want to have a decent audio quality, I know that in car audio there is some serious diminishing return when you build your system.
If you take a look on XDA and like diymobileaudio, you will find hundreds of threads stating that the audio quality is poor even in a car...
You know, If for 50$ I can get a DAC working pretty well with it and that it won't crush the audio quality, I'm all for it
Click to expand...
Click to collapse
Hypnox- OK at 28 your hearing will be far superior to mine-especially as in my mis-spent youth I was in a rock band before health and safety went bananas, we always used the same stage layout so my right ear is shall we say, less than perfect?
I just hate to see people spending money on a system which as you say is subject to the law of diminishing returns when they could be spending it on other leisure pursuits, or food and housing.....
As long as you get a system that floats your boat and you personally are satisfied, who can gainsay that?
Good luck to you, Tony.

Bump. Would love to get an update on the status of that quest of knowledge.

Please can someone help? I really want (as many of you) to use an external DAC (standard PCM2704) with and android HU. It works with my Android 5.1 Tablet but I am really looking for a compatible HU.
Do you have a model that works with USB DAC? I want a recent one available to buy on market.
Thanks

Lets make this Thread a nice help for everyone
So here is my DAC setup and I can say that the sound is so much better. And with an external eq, it is easy to have access to the Bluetooth and the other things you have inside you Head Units until we find a way to send all the signal to the DAC !!!
First of all,
My head Unit is a: XTRONS TE706PL
To go the DAC way, I brought a preamp CLARION EQS755 and an AudioQuest DRAGONFLY RED
The only problem was that I was getting Pops and bizarre sound out of the signal chain.
I get a AmazonBasics 4-Port USB 2.0 Ultra-Mini Hub and I now connect the DAC and the POPS are almost gone now ( it was a current problem i guess ) Only some bizarre sound comes now and then Flash drive is loading. ( only in DAC MODE )
Upgrade for the future
AUDIOQUEST JITTERBUG will change for the IFI ISILENCER
CHORD MOJO or something in that caliber as an EXTERNAL DAC. ( in about 5 month ) as i need some money
I did a some video to show you the difference in quality and the pops I am talking about
https://drive.google.com/open?id=1LEBDARV6GRV_wF3pInB1fgjwm4Aw8Gbf
UPDATED
Just receive my IFI ISILENCER , I can say that the sound is about 1 to 4 % better with it. I test it in my car and in my house. It kinda makes a difference but you need to really focus to hear it.
I still have that computer distortion coming from both my HEAD UNIT and my main computer. ( this have to be regularize before the current goes to the head unit I guess )
have a good day.
Have a good day everyone !

Did anyone figure out a way to get the android volum control to turn up and down the usb audio output. ??

Pumpkin 8 Oreo Sound Quality help USB DAC??

Hi all. Id thought Id start another thread regarding the SQ of this device.
Iv always used Alpine Head Units for last 20 years but bit the bullet and bought this device to try and bring my ICE into the future a bit.
My system is HU - RCA's - C-DSP6x8 - RCA's - 3xJL amps - Focal Utopias (6w2/TN51)/2x JL ZR800's/1x JL 13W3
+ a shed load of experience with Room EQ wizard and at least 2 years of my life I won't get back!
In comparison I can say the SQ of the pumpkin sucks, also a bit of ground noise I never had before.
Will a USB DAC work with this unit?
Which one? I read a thread where someone used a USB to SPDIF converter board with Texas instruments chip on board, very simple which is good and cost less than a tenner from Amazon! then there's dragonfly dongles, then there's miniDSP's MiniDAC8. Price range between £10 & £200
Also I was always under the impression if you use a digital signal from your source unit you cannot control the volume from that source unit as bits and bytes cannot be attenuated so the volume control would be from the DSP(via the wired remote)
Can anyone suggest a tried and tested setup for getting a clean signal from this source to my DSP that wont break the bank, (Bit One out of the question) I think Iv spent enough on my system now as its probably worth more than my car! (B7 audi a4 3.0tdi)
Thanks
ps I am a complete Android programming noob but can learn with a bit of help

from Lollipop there is dac native support on all devices, so it should work.
in joying headunit the radio and bluetooth not work with the dac, u can add small speaker for the bt, or connect another rca pair to the sound processor if the pumpkin also suffer this problem.
i recommend the hifimediy, be aware that spdif its digital connection so its really not important which dac u choose , the conversion from analog to digital will process on your c-dsp
u can see dac support here:
http://www.extreamsd.com/index.php/technology/usb-audio-driver

Hi and thanks for reply. I looked at the DAC you use and read through that link. Another good thing about the external DAC is any analogue ground noise from the device should be isolated. There is ground noise on this units RCA outputs (to be expected on a device in this price range) once you rig up the bluetooth/radio via rca's anywhere into the chain that noise will be re-introduced. I'm not sure there's a way round this issue but its a minor one.
The HiFimeDIY also has spdif out so if connecting to my DSP with digital coax I assume the volume pot wouldn't work? Not a problem since any DAC will have it own analogue volume control I can use the master volume (after DSP). Still if I connected BT/radio via RCA that volume would be controlled by the device. Unless somehow I set everything up for max volume and use just the master to control everything. I have a lot more learning experimenting ahead!
This could be a deal breaker:- Will spotify ouput be routed through the DAC?

mamba76 said:
Hi and thanks for reply. I looked at the DAC you use and read through that link. Another good thing about the external DAC is any analogue ground noise from the device should be isolated. There is ground noise on this units RCA outputs (to be expected on a device in this price range) once you rig up the bluetooth/radio via rca's anywhere into the chain that noise will be re-introduced. I'm not sure there's a way round this issue but its a minor one.
The HiFimeDIY also has spdif out so if connecting to my DSP with digital coax I assume the volume pot wouldn't work? Not a problem since any DAC will have it own analogue volume control I can use the master volume (after DSP). Still if I connected BT/radio via RCA that volume would be controlled by the device. Unless somehow I set everything up for max volume and use just the master to control everything. I have a lot more learning experimenting ahead!
This could be a deal breaker:- Will spotify ouput be routed through the DAC?
Click to expand...
Click to collapse
Yes it will.

Thx GTX its got be worth pursuing then
The model of my unit is AE0273B on autopumpkin. Does anyone know for sure that BT/radio/DAB wouldn't be routed through a USB DAC? Would be interesting to know why?
Should I be looking to root this so I can have Viper4Android installed or Neutron player? I just want to unlock the potential for quality audio out, I dont need to tweek the signal or colour it I would like the output flat but a good PEQ app would be helpful.
Using a multimeter and oscilloscope I swept a pure 0db sine wave through the Alpine and the AC voltage from the pre-out only deviated by about 0.01vac from 30hz upto 10k then it climbed a bit more. Done same thing on the Pumpkin and highest unclipped Vac is 1.2vac at 1khz, at 30hz it dropped to 0.5v and same with higher frequencies, just like a sad smile lol. I want a DAC with a flat frequency response and a 4volt pre-out.
The floor noise / ground noise was made worse because I had to increase input gain cos of the crappy pre-outs.
I could do with some help customizing this for quality audio so if anyone's in the same boat and wants to trade ideas Im open to test things on my device and help out where I can.
what apps & DAC's work for you? digital or analogue cabling? What DSPs? Anything regarding SQ is interesting to me
I think Iv taken one step forward and 2 steps back but I'm committed now lol.

Just found and read through this thread - https://forum.xda-developers.com/an...io-problems-discussion-thread-t3657637/page11
Aluver seems to be able to fix this issue.
The pumpkin is still a great bit of kit for the price and to be fair I used the buggy built in amplifier app to adjust the eq to a V shape, pulling down 1khz (in the middle)as the lowest point (-6db) and as no surprise I think this has cured the problem this HU caused with the SQ. At low volume my target curve in REW appeared the same its only at high volume when the pre-amp output deviations are at their most extreme (sad smile) which is why it sounded too harsh.
Im really not sure if I would be able to tell the difference from a 100% digital system with high quality DAC and my old alpine setup but it does solve a few problems.
Still have excessive ground noise and amp pop when ignition turned off (never had before) so not sure if Ill be keeping this unit, so maybe up for UK sale in near future!

Really interesting thread, are you planning to buy the DAC finally ? It would be interesting to try a DAC, just to get rid of the ground noise for example.
Seeing your setup, if the source has crappy output you will hear it right away so your EQ modification is quite surprising that it improves the quality that much ! I'm still thinking about pulling the trigger on a model similar as you but very afraid of sound quality. Still trying to decide between Joying Intel or Xtrons PX5

Im going to give it a bit more time to see if I can get it to behave. Iv has this set up with the alpine for a couple of years and am always tweaking / improving so Im very aware of any change. If it hurts your ears at high volume then somethings wrong. The alpine's FR was completely flat and clips just over 2v, the pumpkin clips at different voltages (max 1.3v) but on this unit anything above vol 20 with pure tones will clip, its just a pain in the ass but if you always eq your car with high volume in mind for me that's where it matters. Dont rely on tone generator apps their 0db is not accurate I burnt the test wave files from JL audio website to CD as a reference then match it with Room EQs generator so can sweep any frequency.
Yeah Im gonna look for a DAC would be nice if you could control the DACs volume from steering wheel! And the auto switching rca's it doable or might as well go digital to dsp not sure yet its all a bit of a headache lol, but the units capabilities makes it worth trying. I will post any solutions on here if I find them but may be some time.
Im still trying to work out what this unit gives me that an alpine ilx-f903 (or similar) won't, apart from alot of spare change!
Im sure Iv read pros and cons for either them units but don't know enough about whats inside. I know mines a px5. I would be looking for something that can output everything through USB but not sure it exists.

ordered a minidsp usb streamer from amazon £60 delivered +van damme digi cable. First step see what it does out of the box then install 'USB Audio Driver Pro' app which will bypass the native android drivers??
I think this requires usb debugging mode to be enabled in developer options.
I found a switching module that might come in handy - https://www.tindie.com/products/Beni_Skate/automatic-spdif-opticalrca-audio-switch/#product-reviews
If anyone understands what Im trying to do and can foresee what needs to be done regarding operating system changes I would definately appreciate any advice as Iv no experience at all with the programming side of things i.e changing audio policies, etc...
I should be playing with this again at weekend if all the bits arrive

RoNeReR said:
from Lollipop there is dac native support on all devices, so it should work.
in joying headunit the radio and bluetooth not work with the dac, u can add small speaker for the bt, or connect another rca pair to the sound processor if the pumpkin also suffer this problem.
i recommend the hifimediy, be aware that spdif its digital connection so its really not important which dac u choose , the conversion from analog to digital will process on your c-dsp
u can see dac support here:
http://www.extreamsd.com/index.php/technology/usb-audio-driver
Click to expand...
Click to collapse
Hi RoNeReR. I see your usb dac outputs on analogue rca's. Do you still control the volume from the pumpkin?
Thx

Well as promised I will update this thread with my progress to get my system setup with the pumpkin.
I got my mini streamer but digi cable not arrived yet.
So I enabled developer options which was easy but couldn't find the menu anywhere afterwards, eventually downloaded an app call 'developer options' which does what is says on the tin. I found usb debugging mode was already on then went to 'usb configuration' and set to 'Audio'. Plugged in my ministream and was expecting the audio from spotify to go quiet as is should now be trying to route through the streamer but it didn't appear to change anything. I get a feeling when I eventually get the cable and connect to the dsp I will still have nothing. Anyone know what else I need to do to make audio goes through USB? ASIO drivers?
As I said Iv no experience with android OS but Im learning more and more things, so happy days!

mamba76 said:
Well as promised I will update this thread with my progress to get my system setup with the pumpkin.
I got my mini streamer but digi cable not arrived yet.
So I enabled developer options which was easy but couldn't find the menu anywhere afterwards, eventually downloaded an app call 'developer options' which does what is says on the tin. I found usb debugging mode was already on then went to 'usb configuration' and set to 'Audio'. Plugged in my ministream and was expecting the audio from spotify to go quiet as is should now be trying to route through the streamer but it didn't appear to change anything. I get a feeling when I eventually get the cable and connect to the dsp I will still have nothing. Anyone know what else I need to do to make audio goes through USB? ASIO drivers?
As I said Iv no experience with android OS but Im learning more and more things, so happy days!
Click to expand...
Click to collapse
The problem is the software and hardware combination needs modifications (software) to generally work. We have this working on the joying Intel, and hopefully soon on the joying px5 (FYT based) units. Nother brands might not be possible depending on the original manufacturers programming.
If other users with your unit, maybe they have experience. Generally only working on the joying with Xposed properly.

gtxaspec said:
The problem is the software and hardware combination needs modifications (software) to generally work. We have this working on the joying Intel, and hopefully soon on the joying px5 (FYT based) units. Nother brands might not be possible depending on the original manufacturers programming.
If other users with your unit, maybe they have experience. Generally only working on the joying with Xposed properly.
Click to expand...
Click to collapse
I see. I read a post where 'Aluver' says he got usb output working on app media and usb fobs but not on BT/radio/DAB (which went throught the MCU instead of DAC?) so assumed it was doable with a few changes to audio policy. Thinking about it not sure if the thread was referring to my HW/SW. Ill read the thread again but got lost in the jargen which I half understand.
So it looks like I'm just gonna have to wait till someone works out a fix.
So PX5 is the hardware and Oreo the software. Whats FYT based? Can this unit be rooted easily yet?
Thanks

mamba76 said:
I see. I read a post where 'Aluver' says he got usb output working on app media and usb fobs but not on BT/radio/DAB (which went throught the MCU instead of DAC?) so assumed it was doable with a few changes to audio policy. Thinking about it not sure if the thread was referring to my HW/SW. Ill read the thread again but got lost in the jargen which I half understand.
So it looks like I'm just gonna have to wait till someone works out a fix.
So PX5 is the hardware and Oreo the software. Whats FYT based? Can this unit be rooted easily yet?
Thanks
Click to expand...
Click to collapse
Are there any car android devices out there, chinese or otherwise, that allow for routing ALL audio digitally?
Any HW/SW setups know to work?
What about the latest 'NewsMy NR3001'?

mamba76 said:
I see. I read a post where 'Aluver' says he got usb output working on app media and usb fobs but not on BT/radio/DAB (which went throught the MCU instead of DAC?) so assumed it was doable with a few changes to audio policy. Thinking about it not sure if the thread was referring to my HW/SW. Ill read the thread again but got lost in the jargen which I half understand.
So it looks like I'm just gonna have to wait till someone works out a fix.
So PX5 is the hardware and Oreo the software. Whats FYT based? Can this unit be rooted easily yet?
Thanks
Click to expand...
Click to collapse
FYT is the OEM manufacturer for the system on module (SoM) that powers certain head units (that contains the CPU and memory etc)
Px5 is the CPU made by rockchips.

gtxaspec said:
FYT is the OEM manufacturer for the system on module (SoM) that powers certain head units (that contains the CPU and memory etc)
Px5 is the CPU made by rockchips.
Click to expand...
Click to collapse
Whats the model of Joying intel you have working? I assume there is still the problem of bluetooth / voice & radio still not being routed through USB on this as well?
I connected my XP laptop to the ministreamer then to DSP (with vanne dam spdif coax) and played some flac files and it sounds great, noise floor is zero! Shame I cant find a device other than my phone to output a dam digital signal for everything!:crying:!
PS: Android 8 Oreo + all extras for sale... £200 anyone?? (comes with dabonwheels DAB external whip aerial, original in dustbin) Will drop in a B6 / B7 Audi A4 like factory does.

mamba76 said:
Whats the model of Joying intel you have working? I assume there is still the problem of bluetooth / voice & radio still not being routed through USB on this as well?
I connected my XP laptop to the ministreamer then to DSP (with vanne dam spdif coax) and played some flac files and it sounds great, noise floor is zero! Shame I cant find a device other than my phone to output a dam digital signal for everything!:crying:!
PS: Android 8 Oreo + all extras for sale... £200 anyone?? (comes with dabonwheels DAB external whip aerial, original in dustbin) Will drop in a B6 / B7 Audi A4 like factory does.
Click to expand...
Click to collapse
I have the joying Intel that fits into the b7 a4 as well. On their site, and yeah no radio or Bluetooth yet via dsp.

mamba76 said:
Whats the model of Joying intel you have working? I assume there is still the problem of bluetooth / voice & radio still not being routed through USB on this as well?
I connected my XP laptop to the ministreamer then to DSP (with vanne dam spdif coax) and played some flac files and it sounds great, noise floor is zero! Shame I cant find a device other than my phone to output a dam digital signal for everything!:crying:!
PS: Android 8 Oreo + all extras for sale... £200 anyone?? (comes with dabonwheels DAB external whip aerial, original in dustbin) Will drop in a B6 / B7 Audi A4 like factory does.
Click to expand...
Click to collapse
Oh too bad you can't even get the spotify output on the dac? Did you try another dac like hifimediy using optical cable?

gtxaspec said:
I have the joying Intel that fits into the b7 a4 as well. On their site, and yeah no radio or Bluetooth yet via dsp.
Click to expand...
Click to collapse
Thanks for the info gtx.. You know a hell of a lot more than me on these things. If you could suggest a head unit thats a safe bet for what Im trying to do Id appreciate any links / model numbers. I bet there's more than one joying intel out there and dont want to make the same mistake twice

Hypnox99 said:
Oh too bad you can't even get the spotify output on the dac? Did you try another dac like hifimediy using optical cable?
Click to expand...
Click to collapse
Hi. its not the dac thats the problem its that no one can get the output through the usb cable to start with. At least not yet but sure some very clever ppl on here will figure it out:fingers-crossed:

Audio quality. Are there any units with as good quality as OEM?

Hi
I've been looking at getting an android unit to replace the OEM stereo/sat nav in my 2012 Passat. I want to move to get Spotify and Google maps (I'd like to plug a SIM into the unit for internet rather than link to my mobile).
The audio on the OEM is great so I'm worried about moving to something with much worse quality.
All the posts I've read here suggest that all the Chinese units have very bad quality audio? I've been looking at units with the TDA7851L chip.
Is there anything out there now that won't disappoint me? I don't want to go down the road of needing a separate amp.
If not I think I'm stuck with the OEM until I buy a new car!
Thanks in advance for any useful advice!

Does your car have a factory premium audio system? I've seen a few threads about getting Chinese HU to use the factory amp and there are after market adapters available too. Here's a couple threads that mention it. The best advice is to question the seller about compatibility of the HU with the car's system before you buy and talk to many sellers.
If your current OEM radio only has a built in amp then you should probably look for a HU with DSP. The poor sound of some units had a lot to do with the fake EQ they used and the sound got fixed with using Viper4Android. The DSP EQ actually works and saves you the trouble of rooting the HU and installing a custom ROM.
One important consideration you get what you pay for. There are Allwinner and Mediatek HU that sell for cheap and they are cheap so expect the sound quality to be the same.

Amps are pretty cheap. I wouldn't worry about it.
Sent from my Pixel 3 XL using Tapatalk

My experience with a few of chinese HUs is the sound quality is very good. You will find the specs of the off the shelf e.g. TI sound chips are very good Hi Fi. The chinese devs usually use the standard circuits of the chip manufacturers reference design-right down to the same component values.
One problem they sometimes have, is matching these blocks. One HU I had had issue with: volume from radio was full blast at just over min setting of volume control i.e could not reduce volume level to a low enough-full or off! My fix was soldering in resistors in-line at radio audio output ahead of the internal amp. to match levels. Smooth control resulted. Any external fix would have resulted in distorted audio. Max volume, all inputs, should occur at 75-90% of volume setting. This gives full range and a small allowance for weaker than normal signals.

Thanks for the comments. I don't have a separate amp at present and I don't want to put a separate one in, not to do with price, more about keeping things simple. Also I don't want to get involved with soldering etc, I just want 'plug and play'.
Sounds like the HUs with DSP are now pretty good - all the Chinese one's seem to use the same chips, so now need to choose a brand!