yashsingh1/xdaforums huggingface dataset:
[MTCB Android Head Units Q&A] Arokkas:
Weird noises while playing music from SD card

Hi guys,

I have a KLD upgraded to the latest ROMs, more or less happy taking in consideration the price of it.

-There is one thing that gets into my nerves; since I bought the unit I noticed that when I play music from the SD card, there is a background "noise" (not sure if I should call it noise, it's like interference caused by the electronics of the unit itself). For instance when I press the "next" key, there is a small "click" sound or when I am shuffling through the song. As if the pre-amp amplifies every single electrical noise that exists in the unit. My HU is connected to a very good Focal amplifier which unfortunately brings all these flaws to the foreground (I wasn't able to notice them when I was using the built in amplifier). It's worth mentioning that I don't get the same noise from radio or CD playback ... weird stuff, go figure....

-Second annoying thing is that Poweramp and GPS mixing don't go together unfortunately...it seems that the unit doesn't consider Poweramp as a "native" application, therefore it doesn't reduce its music level when there is an announcement coming. The only I can do is force Poweramp to pause through its settings every time there is a NAV announcement, but this is so damn annoying in a residential environment when there are announcements every second street.... anyone ever seen an application that fixes that?

Thanks and a nice evening to all of you!
[MTCB Android Head Units Q&A] peti007:
Yes, I use Coudu's pre-rooted fw and Carservice too. My problem is the seller sent me a canbus decoder for 2010+ Mazda 3, But mine is 2004. After that they sent me a new canbus decoder, what can not access to board/trip computer too. I know, the right one is MZD-SS-02 what Eonon packed with their WinCE units, but they doesn't sell me, because I didn't buy my HU from Eonon.

On the Roadnavi's site:

So the roadnavi's version not fit my car. I have to clear with tradesolution.hk what I need exactly. They are cheaper than roadnavi.

Here is a video: https://www.youtube.com/watch?v=UtqJBg5f0D4

I ask you to check the standby battery voltage, before cranking the car. Thanks a lot!
[MTCB Android Head Units Q&A] webdude12:
Since it has been brought up more then once, and the mods here at XDA do not think we need our own forum, I have created a google group to support individual discussions.

https://groups.google.com/forum/#!forum/android-rk3066-car-stereo-radio-head-unit

You will need a gmail account, but they are free to get, and doesnt mean you have to use it for email.

It has been mentioned that the info in this thread needs to be immediately broken apart and moved over. I do not think that is directly needed. With the search function of the message board, I would say as people ask questions that you recognize are answered over here, lets copy and paste it over there.

I will try to copy links over to the important stuff. Roms, Files, etc But if any of the developers want to do this directly thats fine as well.
[MTCB Android Head Units Q&A] myspac:
2/ perhaps "App Volume" can be usefull : you can choose individual volume for each apps.

(An option is "App Volume Priority" , but I don't know what it is because it's In-app purchases or in full version...)
[MTCB Android Head Units Q&A] typos1:
Yes it has been partially done, use thread search to find it, it was done about a year ago from memory.

If you have a 1024x600 res unit you should use only the 1024x600 res firmwares.

Same as any other Android device really, software improvements, improvements to the look of the GUI, try a few if you dont like them, then go back to 4.2.2.

---------- Post added at 11:41 PM ---------- Previous post was at 11:18 PM ----------

I ve pmed pakidermo today with a list of frequently asked questions to add to the first page as it needs a bit of updating.

People cant be bothered to use the search function here, too lazy, so cant see them using it on G+ either.

I often recognise that questions have been answered before, the problem is when they were answered - it will still be a lot of work getting the info from here and posting it over there., the same amount of work as moving info from here to different sections if we had our own forum on XDA.

The answer really is that people should actually bother to search for their answers before asking questions - 95% of questions on here have been answered before. A group on G+ is the equivalent of having our own forum here, but in order for it to work there needs to be different sections filled with relevant info, just as if we had one on here, otherwise its just people asking questions randomly and we have that already in this thread. Sorry to be negative webdude, I appreciate the efforts you have gone to, I just cant see any advantage to having G+ group as well as this one, at least not without having different sections filled with all the info we ve gained over the last 18 months.

---------- Post added at 11:42 PM ---------- Previous post was at 11:41 PM ----------

Are you using Carservice or Petrows' app ?
[MTCB Android Head Units Q&A] cuboy29:
fingers crossed.. can you share where you got it from?

Edit: the large chip is probably a Toshiba NAND flash where the little android guy lives.
[MTCB Android Head Units Q&A] typos1:
Great news !

Its the flash I think.

EDIT: as [MENTION=352583]cuboy29[/MENTION] said. ;)

---------- Post added at 12:49 AM ---------- Previous post was at 12:46 AM ----------

No probs :good:
[MTCB Android Head Units Q&A] myspac:
http://www.aliexpress.com/item/Quad...Stereo-Radio-Player-For-AUDI/32322861768.html

He have other models for other cars. Very good comunication. I must receive mine next week....

The seller was already discuss in this thread .... Andrew , always up to answer !!!
[MTCB Android Head Units Q&A] Malaysk:
a MCU should you now? 2.49?

Try my new firmware from 18 April 2015 with next launcher 800X600 https://yadi.sk/d/6Rp1rxLFg5VXG

NEW:

Reworked the entire section in the Settings responsible for WiFi. For best performance, WiFi recommend to go to Settings-WiFi-Advanced Settings and disable the optimization WiFi.

Fixed a graphical interface system (the color in some programs were displayed incorrectly)

Reworked dimmer in curtain notifications.

Added to Settings-System-Modification Buld.prof (for experienced users only !!!)

Added to Settings-Information section, where you can immediately see how much is left of free space, the size of all partitions in the system (System, Data, SD card and USB drive)

Added to Settings-screen-scrolling animation.

Added to Settings-System-defined weather, which can include opt-weather curtain and notifications in the status bar at the top. Before you go there, you must include setting a specific location by GPS.

Removed Car Audio Service 1.3 and instead included in the firmware program MTC Service /

NEW True Contacts for calls via Bluetooth. if you have a phone on Android, we do import your contacts to the memory card, then transferred to our State this file to the internal memory, go to True Contacts and do already export contacts. Vse..teper can make calls.

Errors in SystemUImtc, led to the departure notifications curtains etc. inclusion of temperature through kanbas.

Factory settings (password 126) completely redesigned from the latest firmware for RK3188, where new items have been added, and now do not have to restart the SU reset, reboot will be automatic (after your approval) see the screenshots:

Added to Settings-Screen-Ad Blocking.

Added to Settings-Display-Download Center, where you will, for example, can download the modules you need for Xposet.

Reworked and Education section of the Palette button

ROOT, manager for ROOTa SuperUser (SU) has been updated to the latest version.

It includes the modified /etc/install-recovery.sh
[MTCB Android Head Units Q&A] TheXby:
Hello.

I have a problem:

After few hours of work unit screen backlight is turned off. All work (radio, music, navigation) but screen is dark.

I place unit on table and cover it by cloth and it also turned off screen backlight after 1-2 hours. In full dark room i can see some images on screen so all work except backlight.

And i'm sure on 80% that reason is overheating of unit. Manufacturer is KYD. but it seems like KGL and KLD and others.

Anybody know how to fix problem or maybe have circuit diagram or known here is screen backlight controller?
[MTCB Android Head Units Q&A] ga!nusha:
Most likely you need ground loop isolators (not to be confused with noise cancelers).

Yeah, i know how to do it, unfortunately i don't have the tools. :(

And besides, a multimeter onli measures the voltage. You need to measure the power consumption to be sure, the amps.
[MTCB Android Head Units Q&A] Arokkas:
It won't work

Hi there, I bought a high quality ground loop isolator and installed it yesterday, no difference at all unfortunately, I am afraid that these are just noised coming from the inside of the HU due to its poor layout (no shielding etc.). A friend of mine suggested to format the SD cards at NTFS instead of FAT32, he claims that the noise comes from the "reading" of the cards due to low speed. Will give it a try and share the outcome...
[MTCB Android Head Units Q&A] ga!nusha:
Sorry to be insistent, but are you sure the GLI's are properly installed for all 4 pre-outs before the harness /amplifier ? Are the GLI metalic ? For most of the people here GLI's were enough for Huifei and KLD units.

To be honest i don't think ntfs will make any diff.
[MTCB Android Head Units Q&A] mrmrmrmr:
Hi,

I have update the Android to 4.4.4 and now my camera issue is solved. Thank you :)

but my music , radio and launcher apps are replaced. And their widgets are also replaced. How can I get back my original music, radio and launcher apps ?

I have both Titanium Backup and Nandroid backup for my data.

Thx.
[MTCB Android Head Units Q&A] ga!nusha:
Here is the original 4.2.2 KLD Music, Radio and Launcher. I also like them better than the 4.4 version. However i have no idea if they will work. (you need to replace your current apks, so make sure you have a backup)
[MTCB Android Head Units Q&A] CARRisma:
Does anyone know what would happen if someone tried to install these older versions on an unrooted 4.4.4 JY HU? Will they overwrite the current versions?
[MTCB Android Head Units Q&A] giornistrani:
Hi guys I have a radio with Android. Why music with usb and sd feels very disturbed? thanks
[MTCB Android Head Units Q&A] peti007:
OK, thanks for your help, but if you haven't got a multimeter, forget it, not a big deal.

Yes I know that I have to check the consumption. I tested it and the HU's consumption is 10mA as shut down. But maybe this is not constant. After 12 hours with a 50mA consumtion (the whole car in standby) the battery voltage should be more than 12.4V.
[MTCB Android Head Units Q&A] ga!nusha:
Most likely you won't be able. You will either have a signature problem or a version missmatch. You have to be rooted to manually replace the apks.

You can try to install them, but leave the launcher last. Any harm that you will cause will be undoable with an unistall.
[MTCB Android Head Units Q&A] thiago.augusto.souza:
Hi!

I´ve tested again the TV dongle directly, but I´ve confirmed. This stops WIFI and all gadgets on USB are desconected. So I turns off quickly before burn again :(

This idea to use a powered USB hub, can affect internal circuit? Or can I isolate totally of unit´s circuit? I´m very scared with this fragily circuit.

Best regards and have a nice weekend!
[MTCB Android Head Units Q&A] mrmrmrmr:
Hi,

Thank you.

How can I install these ? just install them over or replace the file on system ? (which path ?)

Also, My device is not KLD; it is YZ. So I am not sure if these were the same with mine. How can I get mine back ? (I have Titanium and nandroid backups)
[MTCB Android Head Units Q&A] ktibor69:
The SWC works fine now with Headunit service near ExposedMTC .

When the headunit service app loads I have got this message:

[IMG="Screenshot"]http://kepfeltoltes.hu/150424/Screenshot_2015-04-24-17-58-28_www.kepfeltoltes.hu_.png[/IMG]

How can I set the HU, that I haven't got this message?

The coudu's rooted ROM is running on my HU.
[MTCB Android Head Units Q&A] chris.epp:
Boot Issue (specifically after shutdown)

I got a KD-C0223 from AutoPumpkin and I'm wondering if I have a bad unit.

The symptom I am experiencing is that it will not always boot. (and sometimes goes to a corrupt screen and freezes on the boot logo). Removing all power (ignition as well as power) and powering up again sometimes it will boot. However, after successfully booting, whenever ignition is removed and it powers down, it will never resume (it freezes on the logo or before the log appears every time).

If I hit the reset button, it will then often boot, same as pulling all power.

I have flashed the original firmware, as well as multiple rooted ones. I've upgraded and downgraded the MCU and it's always the same.

Is there something I could be doing wrong? Could it be firmware still, or is this a bad unit?

Thanks for the help!

UPDATE:

Unit is reporting 512MB of ram, when the specs of that unit call for 1GB. Should I just be going for an RMA at this point?
[MTCB Android Head Units Q&A] Buffen:
I'm impressed/confused/overwhelmed! or...Information overload!

Gents,

Greetings from THE NEWBIE - The VERY Newbie!

I’m in the middle of buying a second-hand 2010 Alfa Romeo 159 1,75TBI. It has a retrofit (old) Pioneer XX310 unit, so I thought that I would look for "one of these sexy 2 DIN radio/GPS/Multimedia units"!

Then I stumbled over this forum (during work-hours :)) - and I must say that I have never seen a forum with so much information - but, its close to "Information Overload".

Just a suggestion/question, could this not be broken into sub-threads? I have spend hours reading page after page (still during work-hours) - and I’m not complaining, repeat --------- I'm not complaining! --- but You guys have compiled loads of very useful information here!!

Here comes my question:

The Alfa has an info display - its has Blue+Me - it has steering wheel control, will this still function if I go for one of the units You are discussing?

Cheers - thanks in advance, and excuses for my poor English - its not even my second language, I do hope you understand my Gibberish :)

Buffen
[MTCB Android Head Units Q&A] typos1:
Nothing, you need root to change them.
[MTCB Android Head Units Q&A] giornistrani:
Problem with android car radio

Hi guys, I have another problem with my android car radio. I have already installed the KLD_4.4.4_1024x600_141126 rom and MCU v. 2.47. When I try to play music on USB or SD, only the right loudspeaker works. If I play CD or radio, both loudspeakers correctly work. Can you help me to understand why? My car is an Opel Astra J, can you confirm the MCU 2.47 is right for my car? Thanks.
[MTCB Android Head Units Q&A] typos1:
It should be fine if the usb lead is powered.

I dont think the YZ version were availble in 4.2.2, but it doesnt matter. To change them you will need to go into system/priv-app and copy your original files to back them up, then replace with the versions you want. I havent done this myself with these apps, but I think I remember someone else trying to do install 4.2.2 apps on 4.4 when KK first came out (November) and they had to do something to make them work, so if what I suggested doesnt work then you will have to search the thread for the posts relating to this.

One other person reported similar problems just last week - send it back, it is faulty.

Gibberish ? - You English is very good.

It is possible to break the thread up and put it into sub forums, but a) it would take someone weeks and weeks of work to do it - are you volunterring ?, b) pakidermo, the op, would have to give you his account details for you to access the thread and c) the XDA devs wont even give XDA an Android head units section, let alone a section for these specific units.

KGL make an Alfa 159/Brera/Spider specific model, there is an Alfa specific CAN Bus setting in factory settings, but I do not know how many of the OEM functions will work, whether you will get track and station displayed between your dials or the car menu on the head unit, it is possible, it works on some cars its just whether KGL have bothered to get it all working or not.

If you have B&M and you remove it then your mileage display will flash, so you will need to keep it connected and hide it somewhere. You cant use B&M as well as he Android headunit and why would you want to ? - B&M plays music from usb/sd cards and has a handsfree phone, so does the head unit, why would you want both ? !
[MTCB Android Head Units Q&A] typos1:
I havent heard of that problem before.

The MCU has nothing to do with your car, it is to do with your head unit.
[MTCB Android Head Units Q&A] Brendo:
You need to go into supersu (I think that's the app in the rom, I haven't installed custom yet) and grant root permissions (either delete from list or edit item in list). When something requires root access, it'll pop up with a screen where you need to grant access
[MTCB Android Head Units Q&A] cuboy29:
Thank you for this. Just loaded into my HU and everything seems to be working. Google NOW does not crash anymore yay... I also upgrade the MCU from 2.30 to 2.49 without issue.

Can't wait to upgrade this baby to the RK3188 :)

-Q
[MTCB Android Head Units Q&A] ikovnatsky:
A little help a lot of appreciation . (No sound from tuner)

I found a file names KLD-Android4.2_upgrade_to_4.4_(141208).rar on this thread rooted installed everything seems to be good

Video (backup works)

BT works (Can call)

Radio just hear some minor hiss.

Antenna seems to work with old radio.

Do i need to to reroot ?

Wrong mcu Image ?

I tried changing the tuner selection in the factory settings no luck.

Leaving on a 1200 mile trip next week need radio :)

thanks to all in advance
[MTCB Android Head Units Q&A] -=Gerner=-:
Oh man.... - can you share where you got it from? How much was the painfee, as You paid?
[MTCB Android Head Units Q&A] mrmrmrmr:
Thanks. I will try to replace them in /system/priv-app

actually, when I check the Settings->Applications , I see 2 Music, 2 Radio, 2 Ipod, 2 BT apps. Is it because I restored my apps from TitaniumBackup ?
[MTCB Android Head Units Q&A] supremekizzle:
Currently incredibly confused and frustrated at the impossibility of finding information on the Big 3: Huifei, Ownice, and Newsmy. I'm having an incredibly difficult time deciding. Seems like development for these units is further along, but it has a slower processor. I know quad cores are coming out but I need one like yesterday. I was 100% certain I was going to be getting the Newsmy, but after about 30 hours more of research I'm now even more confused. The Newsmy only has 2 RCA's, now I've always hooked up my speakers with just the speaker wires on my head units, but want to upgrade my sound and add a sub. Will 2 RCA's be sufficient? What else do you use them for. Someone please make the decision for me.
[MTCB Android Head Units Q&A] gmanor77:
RDS auto change frequency

Hi,

Does the unit suppose to switch the FM station frequency automatically when driving to another frequency area?

My unit doesn't do that, I need to seek the station new frequency manually.

Thanks
[MTCB Android Head Units Q&A] trapier88:
I have exactly the same problem with mine (KGL) in France
[MTCB Android Head Units Q&A] art103:
Seat Exeo / ES9784EN

I wanted to post to say thanks to all for all of the information in this thread and report my experience.

I have a 2009 Seat Exeo and initially had trouble getting my unit to work.

Issues:

1) No Steering Wheel Control (SWC - took me a while to learn that acronym!)

2) WiFi drops out ~5s after connecting to mobile hotspot 6" away.

3) Rear speakers not working properly

4) No MFD / DIS / FIS integration

I am now using KGL4 v2.09 (MCU and Android image). This is working well and addresses (1) above.

I have to set CanBus to "No" in the factory settings menu. This seems completely counter intuitive but I found out by accident that it works!

I couldn't find an option that makes the FIS work though (track display in the dashboard).

To fix the WiFi required a slightly more drastic approach.

I dismantled the unit and found that the WiFi antenna is taped to the (metal) side of the casing.

This is a really bad idea! I believe that the RF reflections are causing the WiFi module to either enter low power mode or cut out entirely.

Moving the antenna and allowing it to free-float helped but did not resolve the dropouts completely. It also isn't a long term solution as the DVD player usually goes there :)

I carefully soldered in an RP-SMA pigtail so that I can mount a standard WiFi router antenna on the back of the unit. Keeping the exposed wires as short as possible to keep impedance close to 50 ohms.

This has worked brilliantly and I can now connect to my house WiFi from the drive and have downloaded the Sygic maps (~350MB) with no dropout.

The rear speakers are connected via the RCA connectors (non Bose system). Unfortunately the rear sound is still not up to scratch and is missing all lower tones.

I suspect that I will have to create some form of crossover to mix the subwoofer output from the ES9784EN into the RL and RR RCA jacks for the car.

FIS integration would be nice and will be my next area of integration (hacking / development!).

I took a quick look at the MCU on the main PCB. This is an 8051 based Chinese STC micro. Compilation and development for the chip is easy enough, the problem is reverse engineering the schematic.

The chip is booted from an SPI NOR chip, so taking a backup and re-flashing to restore from a bricked device should be easy enough.
[MTCB Android Head Units Q&A] rapita:
Hi

The rear speakers issues are because the original rear amplifier of Exeo, if you wish that the rear speakers will be OK you need to plug in the rear speakears directly to the unit with a pair of wires for each speakers. I've the same model, Seat Exeo, and I installed two pair of 1,5mm wires for the right bottom interior, inside of plastic moldings, to the boot, and there I connected these news wires to the original wires from the speakers, cutting this from the original installation, and then all it's OK.

The FIS issues it's normal, there isn't any unit for Seat Exeo that can show any information on the FIS.

On my unit the steering wheels is OK.

Best regards
[MTCB Android Head Units Q&A] giornistrani:
Hi guys I describe the problems that I currently have on the car for over a month and I could not solve anything. Perhaps you can understand a little more, I did not understand anything:

- The language of the info display of the car is in English or Chinese (MTCControlsettings.apk makes me select only those two languages and I'm italian)

- Music with USB / SD is ok only in the right speaker, the problem does not occur with CD / Radio

- Music with USB / SD has a bad sound quality, there are interference and do not understand why

- The volume, though set to maximum, is low

I have an Opel Astra J and I installed ROM KLD 4.4.4 with MCU v2.47

Thanks again.