Using AUX Jack - MTCB Android Head Units Q&A

My car already has an AUX input and separate Ipod Dock input that came pre-fitted from the manufacturer (Skoda/VW). I was wondering if anyone has found a way for MTCD RK3188 1024X600 to accept these inputs? Rather than having to retrofit new ones and disregard the ones already built into my car.

Related

FM Transmitter for car discussion

Hi!
I have the Toyota corolla 2008 with a built in radio that doesn't have usb or 3.5mm.
I want to buy an FM transmitter so I can play music from my Galaxy s3 in the car.
Do you recommend any specific one?
I prefer it will be charged from the lighter in the car, and if possible, to charge my phone as well.
Thanks!
I had one from wall mart it was only 13 bucks it works decently but no matter which one you get there will always be a little static. I personally can't stand static so I just installed a head unit.
Sent from my SPH-L710 using xda app-developers app
Car stereo's with built in Bluetooth and AUX inputs can be found for as little as $80 on sale these days. But I can understand if that is out of your budget.
Best thing to do is go to www.amazon.com and do a search for what you're looking for. Then sort the results by user reviews. Then read some reviews to see if you find what will meet your needs.
If I had any experience with the FM transmitters, I'd offer advice. But I have none to give. Sorry.
I drive a 2005 Toyota Matrix, which is very close to your car. I use this kit and works perfectly. I also use a set of rca spltters to have an open 3.5mm input (in-case i need to connect another deivce) and an iBolt dock's 3.5mm hard wired behind the dash for a dedicated connection for my S3
I have an 04 Mazda 6 (Atenza for you Europeans) with a built in radio. My solution was to hook up a Parrot mki 9200 to the radio for Bluetooth (and aux, USB, or pre iPhone 5 connector).

No mic on bluetooth?

Just installed a JY unit. Not getting anything at all on the mic. I have a parrot ck3100 mono mic plugged into the jack in back. Does it require a stereo mic? Does the unit mute the internal mic when you have a mic plugged in? Possibly a mic selection option or mute that I missed? This is the rk3188 1024x600 unit if it matters. Brand new 8" car specific CRV model.
Geekybiker said:
Just installed a JY unit. Not getting anything at all on the mic. I have a parrot ck3100 mono mic plugged into the jack in back. Does it require a stereo mic? Does the unit mute the internal mic when you have a mic plugged in? Possibly a mic selection option or mute that I missed? This is the rk3188 1024x600 unit if it matters. Brand new 8" car specific CRV model.
Click to expand...
Click to collapse
You'll need a 4 pole male to 3 pole or 2 pole female 3.5mm audio adapter in order for your parrot mic to work as intended. Check out the poles on your parrot and the JY stock external mic in order to verify the correct adapter to order. I'm fairly sure your JY's 4 pole. You can find the adapters on ebay etc..
Best to all,
R
rhacy said:
You'll need a 4 pole male to 3 pole or 2 pole female 3.5mm audio adapter in order for your parrot mic to work as intended. Check out the poles on your parrot and the JY stock external mic in order to verify the correct adapter to order. I'm fairly sure your JY's 4 pole. You can find the adapters on ebay etc..
Best to all,
R
Click to expand...
Click to collapse
Geekybiker did you came right,,, I have hot the same problem. I thought because both of them are two pole I thought they are compatible but obviously not.
Or must the poles be sopped around?
Any ideas
jalize said:
Geekybiker did you came right,,, I have hot the same problem. I thought because both of them are two pole I thought they are compatible but obviously not.
Or must the poles be sopped around?
Any ideas
Click to expand...
Click to collapse
Joying tech support confirmed that plugging in a mic mutes the internal mic. Also it requires a 4 pole mic. I just used the included mic and everything is good.

Joying MTCB HU, USB connections.

Just installed a Joying:
. SKU: JY-UL124 . Quad Core Android 5.1.1 Lollipop OS Capacitive 7" High Definition for Universal Double Din . CPU: RK3188 1.6GHz Cortex A9 Quad Core, Resolution 1024*600. RAM:DDR3 1G, 16 GB memory
To my 2014 Australian Hyundai Elantra.
I waited to get the latest HU from Joying that has an unrated mother board and USB/ Comms board. With Lollipop 5.1.1. the unit performs very well with none of the problem previously mentioned on these pages. The internal and external mics are clear and the Bluetooth systems are perfect. Unit has been rooted and I don't seem to need for apps so I won't changed the software.
The dimming for the button and the screen to follow the vehicles rheostat was fixed by making a circuit to invert and amplify the rheostat output to the HU ill line. Work's well, Kudos to the guys at the Subaru forums.
I had one bug fixed by Joying when the GPS nav was muted whenever I plugged in the DVR front camera. Joying quickly sent me a link to re flash my firmware and the problem was fixed. I have them currently looking into a bug when I view the DVR input shown on the HU I get lots of flashing to the screen in all pixel settings. I have been told this will be fixed in the next firmware update soon.
One problem that I can't solve is when I try to use my vehicles Multimedia Jack located in my center console. There is a Aux and USB jack there. All wiring from console to HU is complete. If I connect a USB stick to the Jack in the console then then HU struggles to connect and gives up. If I interrupt the USB plug and socket behind the HU then I am able to use the USB correctly. Looking at the car wiring diagrams there is a amplifier cct behind the Multimedia Jack supposedly to amp up the USB to HU. Doesn't seem to work?
Any ideas appreciated.
Duke
If anyone has any ideas on
i have nothing to add, other than interested to see what the result is. Are you saying that your car comes with a built in hub in the console, and you are trying to make that USB port in the console work to the Joying head unit? my vehicle is similar, and I would like that to work as well
Update
Yes I have a console hub I guess.
The book calls it a multimedia center. Just an Aux port and a USB port or Jack in the tidy bin in the center console. If I by pass the Jacks and directly put the USB stick into the USB tail from the radio then it works fine. When I plug into the console port it tries to read it and fails. The HU then reports a read fail, have tried other known working USB sticks.
I have inspected behind the console jacks and found a cct board attached to the Jacks and then to the car wiring. From looking at the diagrams of the car previous to mine I see a cct board containing what looks like an amplifier. Tracing the car wiring to the radio input connectors seems to be OK and the wiring correct. Voltages at the radio connector are right in that there is 5v +ve, negative - earth and the center pins are data as they should be.
The console Jacks
w.hemanual.org/multimedia_jack_description_and_operation-2037.html
The wiring for same (mine is same but more complex)
w.hemanual.org/multimedia_jack_schematic_diagrams-2036.html
Really bugs me not to be able to access that USB input Jack esp as the radio is a great unit.
You need to post this question in the MTCD (Lollipop) hardware thread. This thread is for MTCB (KitKat) units. The hardware in the MTCD headunits are very different than the MTCB headunits.
bsavoir22 said:
You need to post this question in the MTCD (Lollipop) hardware thread. This thread is for MTCB (KitKat) units. The hardware in the MTCD headunits are very different than the MTCB headunits.
Click to expand...
Click to collapse
When I tried to repost this in MTCD I get this.
vBulletin Message
To prevent spam, you must have a higher post count in order to make a new thread in this development section. But feel free to make new thread in the non-development sections like General, Q&A, etc. Thanks for your understanding!
Am I still in the wrong section?
Yes, the MTCD thread is for the headunits with 5.1.1. The hardware changes and software are different. Send one of the admin a message and tell the why you need to get the permissions to post. I had to do that some time ago. Just make sure you follow the rules when post or you can have you account suspended or whatever the moderators deem necessary.
Sent from my SM-N910T3 using Tapatalk
Posting
Ok thanks for that. I don't seem to be able to find how to "Send one of the admin a message" Can you help?
Just for info, there are both MTCB/C and MTCD/E Lollipop units.

Anyone with a dead px3 who can locate the SPDIF pin? (Expose the Balls)

Hi, I recently installed an MTCD px3 unit in my car but the audio quality is not that great. I'm looking at the option of a USB DAC but that appears to have its own set of issues and complexity.
I do note though that the RK3188 chip includes an SPDIF function and this does appear as an audio device in /proc/asound/cards so if the pins (balls) are exposed somewhere on the px3 module board then it should be just a matter of soldering to the right points to create an SPDIF interface.
If someone has a totally bricked unit would you consider doing some research? I.e. using some heat to the remove the RK3188 BGA chip and locating the ball that relates to SPDIF and seeing if it can be traced to a track?
The SPDIF transmitter is located at ball N20. You can find the datasheet by googling "RK3188 Datasheet" (sorry I can't post links yet). So who can "expose the balls"?
Alternatively if someone has a dead board/unit they would give away, I'd be happy to pay shipping for you to send it to me (in New Zealand) and I'll do the research and share my findings with the community.
Also looking for someone who understands what would be required on the software side of things to actually use the interface. Some kind of ALSA magic I guess?
Note - I do understand the limitation. I.e. this only applies to audio within Android, not the radio or bluetooth etc. My approach would be to install a physical switch so I could switch my car amp between the analog and digital outputs.
mcraenz said:
Hi, I recently installed an MTCD px3 unit in my car but the audio quality is not that great. I'm looking at the option of a USB DAC but that appears to have its own set of issues and complexity.
I do note though that the RK3188 chip includes an SPDIF function and this does appear as an audio device in /proc/asound/cards so if the pins (balls) are exposed somewhere on the px3 module board then it should be just a matter of soldering to the right points to create an SPDIF interface.
If someone has a totally bricked unit would you consider doing some research? I.e. using some heat to the remove the RK3188 BGA chip and locating the ball that relates to SPDIF and seeing if it can be traced to a track?
The SPDIF transmitter is located at ball N20. You can find the datasheet by googling "RK3188 Datasheet" (sorry I can't post links yet). So who can "expose the balls"?
Alternatively if someone has a dead board/unit they would give away, I'd be happy to pay shipping for you to send it to me (in New Zealand) and I'll do the research and share my findings with the community.
Also looking for someone who understands what would be required on the software side of things to actually use the interface. Some kind of ALSA magic I guess?
Note - I do understand the limitation. I.e. this only applies to audio within Android, not the radio or bluetooth etc. My approach would be to install a physical switch so I could switch my car amp between the analog and digital outputs.
Click to expand...
Click to collapse
Hi.. my Android Radio just recently crashed. If you like.. i can give it to you.
Its a Hot Audio Android Radio PX3 RK3188.
Thanks very much. I've sent a PM.
Cheers,
Rhys
do you located SPDIF transmitter? Is possibile to connect directly an external DSP such Audison P8.9?
Bump

MCTD Units and VSS wire?

Hi,
Can anyone confirm if MTCD PX5/PX6 devices support VSS (Vehicle speed sense) without a canbus? One of my cars don't use canbus, but it does control audio volume depending on the speed. It is a convertible car and it works in the way that as soon as the roof is folded it activates the switch and audio volume increases. One of my old aftermarket head units had a "Speed+" pin on the connector and it workd out of the box however I am seeing that these new Rockchip devices for example Dasaita units don't have that wire anywhere in the harness but perhaps it is not activated on the main board?
mariof said:
Hi,
Can anyone confirm if MTCD PX5/PX6 devices support VSS (Vehicle speed sense) without a canbus? One of my cars don't use canbus, but it does control audio volume depending on the speed. It is a convertible car and it works in the way that as soon as the roof is folded it activates the switch and audio volume increases. One of my old aftermarket head units had a "Speed+" pin on the connector and it workd out of the box however I am seeing that these new Rockchip devices for example Dasaita units don't have that wire anywhere in the harness but perhaps it is not activated on the main board?
Click to expand...
Click to collapse
Doesn't need vehicle speed sense input as it has GPS.
Modded ROMs, launchers and xposed mods provide this function (vehicle speed dependant volume control) via GPS.

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