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I would like to build an Android car infotainment device to replace all my gadgets inside the car. One option would be a micro PC with USB touchscreen and a lot of devices connected via USB. The other one would be an Android gadget, either small tablet or TV box.
The biggest question I have is: what Android devices support 5.1 audio? This is a must, though I actually can use only 4 channels. What audio formats are supported for this?
The other question would be TMC - the FM kind, not online.
Are there any embedded platforms out there (except PC and Android) which support multi-channel audio?
Has anyone done this before? I might be reinventing the wheel.
No updates? Either nobody knows about Android 5.1 sound output or they are working under NDAs.
Are you planning on keeping a headunit to control volume, do you want am/fm radio, etc....
without a headunit you will need an amp where you can use the headphone to rca adapter and usually its the amp that would add front and rear to the left/right output of your android device so you would still get the 4 chan output effect. to go for the 5.1 chan you will need another device that actually controls the 5 speakers plus the subwoofer which might be tricky but I'm sure its not impossible.
the setup I was going to go with was a amp that I can mount its power controls (left right front back and volume) (or amp/eq combo) to where I can reach it and build a mount for a 7in (possibly diff size not sure depends on how it will look) and use the heaphone to rca adapter to power the audio and put the usb inside the dash possibly with a little hub if they make it (that way not only is it getting power from it, if it allows, the addition of say a thumb drive with added music/movies. some tablets/phones have fm radios built in as long as something is plugged into the headphone jack (my new phone doesn't seem to have it but thats a feature I will be looking for in a tablet)
4chan amp
eq that would allow 2 chan in and 4 chan out plus sub out (if you have a separate sub amp)
I just want to know if there are any android devices that are able to stream 5.1, I can take it from there. Same question about TMC support.
Some details:
My car is already fitted from the factory with 4 channel preamp and 12 speakers including subwoofer low-pass. It has low-level input for those channels, worst case I would buy a preamp.
FM is pretty much given on most Android devices, probably excluding some tablets, but I won't actually miss it if it's not there.
TMC would be nice since all Androids usually have a GPS sensor and sometimes compass.
Anyway, it was mostly a request for suggestions or even a rant - I'm surprised that something like this doesn't exist yet. With the exception of dedicated units going >$$$-$$$$, an alternative set-up would be a medium-range blueray player coupled with an Android tablet. Music control could be set up with DLNA, bluetooth streaming or mixing player and android audio would be a bit harder but not impossible.
hey friends
this is a nice thought and you are absolutely great.
this is wonderful thread
........................
Great Idea
Hi,
Currently I'm also thinking about installing an android tablet in my car to have music, navigation, movie player, speed camera warning, etc. But the biggest problem is the sound. I want to connect tablet with car audio using jack-jack cable. Everything is fine till the AUX source is selected in car audio device, but when I switch it to Tuner or CD - the sound from tablet is cutted off, so e.g. navigation announcement are not heard.
Any suggestions for this issue?
audio rom
its a shame that there are many many roms but none fur special purposes like this.
we need a car rom
[email protected] said:
Hi,
Currently I'm also thinking about installing an android tablet in my car to have music, navigation, movie player, speed camera warning, etc. But the biggest problem is the sound. I want to connect tablet with car audio using jack-jack cable. Everything is fine till the AUX source is selected in car audio device, but when I switch it to Tuner or CD - the sound from tablet is cutted off, so e.g. navigation announcement are not heard.
Any suggestions for this issue?
Click to expand...
Click to collapse
Only solution can see is to run the audio from the tablet alone. I.e. use the tablet to provide both radio tuner AND navigation. You will end up using the car system purely as an amplifier.
Cris123 said:
Only solution can see is to run the audio from the tablet alone. I.e. use the tablet to provide both radio tuner AND navigation. You will end up using the car system purely as an amplifier.
Click to expand...
Click to collapse
This would be what I would do in this situation. Or just unplug the audio cable from the tablet when using other radio options so the navigation will come through the tablet's speakers.
I want to do something similar but rather than purchase a new device I want to use my Note2. No head unit at all. The Note2 would likely be dedicated to this use and I'd get a different phone to use as, well, a phone.
For sound I was hoping I could use USB OTG to connect a USB sound card with 5.1 output but I'm not sure if this would work. I want to use the sound card instead of audio direct out of the headphone jack because that reduces my connected cables to just one (easier) and should provide at least 4 channel output which eliminates the need for another device to control volume, fader, and balance.
For radio I was going to use SDR for AM/FM (and more) via a cheap USB TV tuner.
http://sdrtouch.com/
Where I'm stuck now is that I'd like to be able to connect an iProduct (iPhone/iPod) like you can to most car radios and control/stream music from the iProduct, via the Android Note2 using USB OTG again. I cannot find how to do this but the Parrot Asteroid Smart runs Android and it seems to be able to do it so it must be possible.
http://www.parrot.com/usa/products/asteroid-range/parrot-asteroid-smart/
Any info anyone can provide regarding the sound card and iPod integration would be highly appreciated.
You can go wireless and use some AirPlay receiver for Android.
I don't know about wired solutions, the classic iPod connector has ~30 pins and some of them are used for audio and some of them are used for serial-like playlist control plus current track information.
brainwash123 said:
You can go wireless and use some AirPlay receiver for Android.
I don't know about wired solutions, the classic iPod connector has ~30 pins and some of them are used for audio and some of them are used for serial-like playlist control plus current track information.
Click to expand...
Click to collapse
It's just a USB to iPod cable that they use for everything else... Parrot Asteroid Smart that I linked to has it as do most modern stock head units.
Did a little more googling and it seems several companies sell android head units that support iPod.
Why don't you use a USB DAC? There are a few out there that are surround sound capable.
Out from the DAC into an eq preamp and out to your existing amplifier. The eq preamp has main volume controls as well as sub control with dedicated output.
Also there are head units out there that are just "receivers" capable of accepting a digital inputs and outputting 5.1 signal via RCA.
I installed a nexus 7 2013 in my VW, currently using Bluetooth to connect to a receiver where it the outputs to an rca input on my deck that was relocated to my glovebox. I am planning on replacing the Bluetooth adaptor with a USB DAC in order to achieve a higher quality sound.
I am currently doing a similar install in a 2010 charger, a deck will not be used however as I will be using the DAC method with an eq and output to the factory amp. I considered going the android TV box route as I have a MINIX box, but there is some work involved in getting the touchscreen to function properly as it is not set up for this out of the box.
You can purchase a double din deck from eBay (I stumbled across it a few days ago but didn't write the link down) it has a dual os system. It uses android for the car audio function and windows for the car PC function. Not sure how well it works but it got reasonable reviews.
Edit: ...and once again I answer without reading the whole thread...:silly:
Is it somehow easier to get all the various apps on the phone to output audio to a DAC than a USB sound card?
unL33T said:
Is it somehow easier to get all the various apps on the phone to output audio to a DAC than a USB sound card?
Click to expand...
Click to collapse
I believe when the device detects a DAC (must use an otg cable BTW) it automatically re routes all audio out the USB. You can disable automatic USB audio routing in developer settings.
k.s.deviate said:
I believe when the device detects a DAC (must use an otg cable BTW) it automatically re routes all audio out the USB. You can disable automatic USB audio routing in developer settings.
Click to expand...
Click to collapse
That sounds easier. Thanks for the tip.
Well I can't find any information regarding the iPod integration and I've found next to nothing for DVD video and audio CD playback and radio and backup camera functionality would also take some mucking about so it looks like I'd probably be better off buying something like this:
http://www.ebay.com/itm/7-Android-4...621?pt=LH_DefaultDomain_0&hash=item2a31320af5
Which has it all sorted out already. So much for that fun idea. No idea what apps they use for all that stuff.
Which has it all sorted out already. So much for that fun idea. No idea what apps they use for all that stuff.[/QUOTE]
That unit looks slow at only dual-core. It will probably be sluggish when multi-tasking.
The main chip probably supports several I2S devices (aux in/adc, tuner/adc, DVD) and routing plus demuxing is done via linux hardware control.
The DVD player and tuner probably support the i2c or spi protocol to control seeking and other functions. This is again controllable via the linux devices.
Usually the consumer devices don't have these easily exposed and it's probably a non-trivial task to piggyback on existing hardware, assuming the needed connections are broken out on the board. As far as I can see the only Android devices with CD or DVD are the car players like above.
Another option would be to take the sound from the HDMI signal. A DVD player/tuner can be wired in parallel with an HDMI switcher. However controlling the tracks would not be easy, it would require emulating the remote with an IR transmitter.
Hey guys,
I just bought a new unit and have had fun installing/setting it up. But I've run into a few problems/questions that I can not easily solve from searching. I'm hoping for some help. I appreciate any insight that can be provided!
purchased:
MTCB 800x480 (EONON GA2114)
1.) I can't get the reverse camera to work
My previous head unit was the Astroid Parrot Smart and my backkup camera was working. I've setup my MTCB as follows: HU reverse wire to reverse light 12v & HU "cam in" to camera's RCA plug. I'm experiencing: when I put in reverse gear, I get a yellow triangle exclimation point and no proper video. Could this be becuase I have not grounded the HU parking wire (everything else is working properly without having to do that. Is there a setting somewhere I need to change?... pal vs ntsc?
2. ODBD not working correctly.
I can connect to it in bluetooth settings but Torque can not connect to it. I do have blue OBDB icon that appears in the taskbar
3. Keypress (for the physical hardware buttons) volume is too loud
even if I have the radio volume turned all the way down
4. music volume is too loud when volume set at one
With the volume of music at it's lowest setting, it's at a normal listening level.
5. Elements in Settings disappeared
It's just gone. I can't change the physical button colors any more. It was there before.
6. Saved radio stations.
After a scan is complete.... I can't figure out how to reorganize the order of stations.... or even delete the unwanted presets
7. Best way to automate wifi hotspot?
Should I set a tasker action to start hotspot upon bluetooth connect to unit? I sometimes have bluetooth manually turned off though. ... what's everyones solution to this? I though about a NFC sticker placed on my phone dock to automate bluetooth/hotspot.
pdappcgeek said:
Hey guys,
I just bought a new unit and have had fun installing/setting it up. But I've run into a few problems/questions that I can not easily solve from searching. I'm hoping for some help. I appreciate any insight that can be provided!
purchased:
MTCB 800x480 (EONON GA2114)
1.) I can't get the reverse camera to work
My previous head unit was the Astroid Parrot Smart and my backkup camera was working. I've setup my MTCB as follows: HU reverse wire to reverse light 12v & HU "cam in" to camera's RCA plug. I'm experiencing: when I put in reverse gear, I get a yellow triangle exclamation point and no proper video. Could this be becuase I have not grounded the HU parking wire (everything else is working properly without having to do that. Is there a setting somewhere I need to change?... pal vs ntsc?
.
Click to expand...
Click to collapse
When you say parking wire I assume you mean park brake wire. The park brake wire has nothing to do with reverse video. It is suppose
to turn off DVD video during driving. Which can be changed in settings BTW. Exclamation point normally means no video. Are you sure
you used the right input and that your camera is providing video? Test your camera on a normal video in and verify if you get a picture.
Also verify that your reverse camera gets 12 volt when selected.
Hi everyone - a little desperate here. I have a Dasaita 10.2" Android 8.0, Octa Core 4GB+32GB in my Jeep Wrangler. Amazing unit overall but the amplifier app doesn’t seem to give me any EQ, Balance/Fade or Subwoofer control. If I move the sliders around nothing happens to the sound. I reached out to Dasaita and the response was that I cannot use an aftermarket amp with this unit - doesn’t that seem absurd? I would think the RCA outputs could output to any amp. Really hoping someone has has experience with this... thanks!!
Lkinmond said:
Hi everyone - a little desperate here. I have a Dasaita 10.2" Android 8.0, Octa Core 4GB+32GB in my Jeep Wrangler. Amazing unit overall but the amplifier app doesn’t seem to give me any EQ, Balance/Fade or Subwoofer control. If I move the sliders around nothing happens to the sound. I reached out to Dasaita and the response was that I cannot use an aftermarket amp with this unit - doesn’t that seem absurd? I would think the RCA outputs could output to any amp. Really hoping someone has has experience with this... thanks!!
Click to expand...
Click to collapse
I installed mine and am running into the same issue. Does anyone have a solution? No RCA outputs that I can see. I am thinking about returning it.
TreesOnTheBeach said:
I installed mine and am running into the same issue. Does anyone have a solution? No RCA outputs that I can see. I am thinking about returning it.
Click to expand...
Click to collapse
Ok ur rcas don't work... take ur speaker lines add an rca onto each one and continue to setup as u normally would. Now if u hav no sound from the unit then it is broken
Sent from my [device_name] using XDA-Developers Legacy app
TreesOnTheBeach said:
I installed mine and am running into the same issue. Does anyone have a solution? No RCA outputs that I can see. I am thinking about returning it.
Click to expand...
Click to collapse
My RCA outputs work fine though as previously pointed out the Fader and EQ controls seem to have no effect. You can use a music player like PowerAmp which has its own EQ controls to get around it... I've reached out to Dasaita to see what's going on...
I have a similar unit from dasaita, nissan murano.
I am using RCA to my amp, and the built in equalizer and loudness work fine.
The only issue is I am hearing a small static noise when no music is playing.
Change canbus settings
I just installed the v840 7in version in my jk last week on 8/5/18. First thing I did was check how itsounds. Went to the EQ and did not work no setting made any sound change and the fader did not work. My heart fell out and I was ready to send it back.
I went ahead and updated the system files to the most recent but did not change anything with the eq or fader. I then recalled discussion on Jeep forum to change the canbus settings. When I went in the settings it was Jeep 46 I changed it to Jeep 78 and voila EQ works and also the fader although the fade is reversed which I already knew was an issue. Only difference is I don't have an amplifier so I cannot verify that issue although others have amps working fine with full eq functionality.
RESOLVED: Dasaita fader/EQ control w/ external amps
More from jeep forum
For those reporting issues with built in EQ and fader controls on Dasaita PX5 Octacore units not working with aftermarket amplification I figured out the settings....
blocked image
Open up system settings and navigate to "CAR" and then "Factory Settings"
blocked image
Enter the Password '126' to get you into the Factory menu. Navigate to the "CanBus" tab:
blocked image
Change the selection under Amplifier from "With amplifier" to "Without amplifier", click [APPLY] followed by [EXIT] and let the system reboot.
RESOLVED: Dasaita fader/EQ control w/ external amps
Use the jeep 46 setting to access the amp option
VertJeep said:
Use the jeep 46 setting to access the amp option
Click to expand...
Click to collapse
Thanks for the info, It works for me, but the bigger problem is, the factory alpine amp don't seems to work, no bass at all.
I have checked every jk forum i can find but no solution. ppl mentioned Pac canbus a lot. but I prefer the unit work it self out.
akassi said:
Thanks for the info, It works for me, but the bigger problem is, the factory alpine amp don't seems to work, no bass at all.
I have checked every jk forum i can find but no solution. ppl mentioned Pac canbus a lot. but I prefer the unit work it self out.
Click to expand...
Click to collapse
I dont have a jeep, but there is a similar issue with the tundras, if they were using the stock amp they needed to have a CANbus decoder to utilize the factory amp some units have them already installed some don't.
bsavoir22 said:
I dont have a jeep, but there is a similar issue with the tundras, if they were using the stock amp they needed to have a CANbus decoder to utilize the factory amp some units have them already installed some don't.
Click to expand...
Click to collapse
Thanks, guess I will have to cut off the garbage they provided and rewire the harness.
I got this Disaita for a 2014 Jeep Wrangler JKU with the factory alpine sub/amp. The sound works great. It's true you can't control the fade/balance of it because the jeep's computer is controlling it. I know the OP has an aftermarket one, but that could be what Disaita thinks you are talking about. The included canbus, wiring harness, etc all worked out of the box.
https://www.amazon.com/gp/product/B0796VPGG3/ref=oh_aui_detailpage_o05_s00?ie=UTF8&psc=1
2012 FJ Cruiser install here. Same issue. I changed the factory canbus settings, but don’t understand the options. I am getting rear sub output but no fade control at all. I don’t know enough to retire it all, nor do I have the time or patience.
Hello all!
Edit: if you're not interested in the Story, and just want the solution, scroll to Chapter Four
This already has been quite the journey, in fact I went way deeper down this rabbit hole than I'd like to admit, so here is the story:
General info:
Car: Audi TT mk2, 2011, has Bose audio and hands free talking, previous stereo was the RNS-E
Headunit: Xtrons PB78ATTRP, PX5
So the problem was/is, the unit only outputs Sound in these apps:
-Radio, A2DP, Phone Calls, CD-Player, Music or Videos that are loaded onto the micro-SD
I contacted the Xtrons support, apart from being very unhelpful and not doing anything, I later got them to send me a new can bus-adapter (will come into play further down).
So because they weren't very helpful, and i really liked the unit, and with basically no alternatives (Xtrons units claim to be plug+play with the Bose systems, which no other manufacturer I came across claimed), I decided I'd try to hunt it down myself.
Chapter one: Updated the unit to the newest Xtrons firmware + MCU, that did nothing. Updated it to lots of different MCUs, didn't do anything either. Installed Hal9k, no change. Different MCU again, no change. Went on many searches on google, and found people with similar/same problems, but no solution. Then came across something entirely different ,but it gave me new ideas.
Chapter two: I reset the unit a few times, back to Xtrons, back to Hal9k, no change, then I came across the factory settings: you can access those in the car settings all the way down, then enter 126. Standard setting for the can bus profile was, I think, 23 AudiA3, A4. Changed it to anything different than that, and voila, sound now works like it should (although the Bose amp is now always on, when the stereo is on, giving out a little white noise). However, a new enemy emerged: now the steering wheel controls, of course, stopped working.
Chapter three: Tried many different settings in the factory-can bus settings, of course, no difference. At this point, I figured the only thing that could be wrong is either the can bus decoder box or the MCU. So I got that new box from Xtrons, and nothing changed. More internet search fopllowed: I found out some MCUs work across different manufacturers, Xtrons being "GS" for example. So I tried some different ones, and found my can bus box, being a "GS", wouldn't speak with those MCUs. At this point, I got sick of it and figured I'd learn to live without steering wheel controls.
Chapter four: a month or two after chapter three (Today), I figured why not give it another try. So I did another google research on people with can bus problems on PX5 and found this Thread.
So i did what he did, and: IT WORKS! (sort of) Now I have sound in all Apps, and working steering wheel controls. The amp is still constantly on and makes white noise when no music is playing, and i cant completely disable the can bus app, only force stop it, resulting in probably having to force stop it if it somehow starts itself or the unit reboots (if it only sleeps it's fine).
So now, I finally know where the dog was buried so to say, I guess to really fix this id need an update for that can bus-app, which probably Xtrons won't provide
I hope this helped everyone else with that problem, and I'd appreciate any ideas on how to proceed with that can bus-app
have a good one,
Hello, today is your lucky day
I have a 2010 audi ttrs and a Xtron TE706PL with Rom Hal9K ... and i have can bus original from Xtron.
The radio is a universal Xtron one, but i have buy the can bus from radio Xtron for TT Audi.
I have choose in factory the audi A3.
This is not the first android car that I ride.
I have put mcu modified GS, for better sound and it is better with the bass.
https://forum.xda-developers.com/an...ent/mod-cs-x-mod-mtcd-e-mcu-firmware-t3816042
For the problem of the amp remaining simply connect the cable vag com and select "1 via remote wire", which will tin the amp with the +15 contact.
For the problem of noise parasite, just go down, with the vag com, the level of the amp, but you can if you want raise the level of the Xtron radio, I'm at -6db for the amp bose.
https://forums.vwvortex.com/showthread.php?5645132-Bose-aftermarket-HU-WARNING!
With the perfect Hal9k rom, you can change the function of the steeringweel control !
Math
Question
Sorry for the Question.
What you mean with….
For the problem of the amp remaining simply connect the cable vag com and select "1 via remote wire", which will tin the amp with the +15 contact.
Best greetings
Pat
EverMath said:
Hello, today is your lucky day
I have a 2010 audi ttrs and a Xtron TE706PL with Rom Hal9K ... and i have can bus original from Xtron.
The radio is a universal Xtron one, but i have buy the can bus from radio Xtron for TT Audi.
I have choose in factory the audi A3.
This is not the first android car that I ride.
I have put mcu modified GS, for better sound and it is better with the bass.
https://forum.xda-developers.com/an...ent/mod-cs-x-mod-mtcd-e-mcu-firmware-t3816042
For the problem of the amp remaining simply connect the cable vag com and select "1 via remote wire", which will tin the amp with the +15 contact.
For the problem of noise parasite, just go down, with the vag com, the level of the amp, but you can if you want raise the level of the Xtron radio, I'm at -6db for the amp bose.
https://forums.vwvortex.com/showthread.php?5645132-Bose-aftermarket-HU-WARNING!
With the perfect Hal9k rom, you can change the function of the steeringweel control !
Math
Click to expand...
Click to collapse
Hello,
By changing this option, the original bose amplifier will shut off when you turn off and take off the car key.
Math
https://picclick.fr/Vcds-vag-com-hex-can-189-français-dernière-génération-401741194415.html
Or go to your Audi dealer to change the options?
I recently installed a Xtrons PQS90MTVL head unit in a skoda superb. I have a couple of questions on how to get it to work correctly when navigating.
1) It seems that you can set the navigation sounds to be a percentage of the radio volume but cannot set it to play at a given volume regardless. The problem is that the radio seems to be constantly on and there is no way to turn it off. The 'on/off' button simply mutes the radio - and the navigation sounds.
Often I am in an area where I cannot pick up a decent radio signal on the programme I want and just get static. In these situations I want to turn the radio off but still hear navigation sounds. I don't want to listen to loud static just so I can have the nav sounds play at a percentage of that static. Is there a way to turn the radio off but still get navigation sounds? (a workaround I have found is to play a media file instead of the radio and then pause playback. The nav sounds are then still a percentage of the - non existent - playback volume. However this should not be necessary)
2) It also seems that a Internet connection is needed for any navigation. even google maps won't do a search without it as it says I am offline. (is this true?)
I have bought the 4G wifi dongle but have a question about its use. Does the HU connect to the dongle, as far as data is concerned, via the USB socket that comes out of the back of the unit or is that socket simply powering the dongle and the HUI is actually connecting to it over wifi using the dongle as a hotspot? If so then I don't have to use the wired usb socket from the unit (which I suspect is underpowered) and can plug the dongle into an ordinary 2A USB socket that I have in the car, positioning the dongle near the roof for a better signal
Incidentally I did try using Android Auto with my phone using wired connection. That seems sort of OK but is not very reliable. Often when starting the car it hangs at the 'connected' screen, or even at the 'trying to connect' screen, although other times it seems OK
3) There is a small socket on the left hand side of the HU that looks like a slot for a small memory card or a sim card. It is labelled 'GPS'. What is that socket used for? it is not mentioned in the manual as far as I can see. - The manual is generally a bit hand waving though, excitedly telling you what you can do but not how to do it.
(I did try the xtrons forum but not only are the last posts there around January 2022 but there seems to be no way to register for it. Hence posting here)
Is it MTCx post system info including mcu version.
Mtcb is long retired
marchnz said:
Is it MTCx post system info including mcu version.
Mtcb is long retired
Click to expand...
Click to collapse
All I know is the model is Xtrons PQS90MTVL so maybe its MTVL (whatever that is) I'm afraid I don't know what mcu means so cannot offer any version for it. Its possible I have posted this in the wrong section and have rep[osted in 'Android Head-Units'. If that is the right place and this is the wrong place, please can you delete this post