problem with blue tooth mobile sound - MTCB Android Head Units Q&A

Hi
I upgraded my SKODA CAR head unit HUI-FIE Model S07 , to MCU Version MTCB-KGL4-V2.55
Android version 4.4.4_30062015, kernel version 3.0.36+ [email protected]#226
Build number rk3066-eng4.4.430062015.19:04:07
Cpu armv7 1.6GHZ(X2)
MEMORY 512 Mb
I have the following problems
1- The volume sound raises up and down suddenly
2- The reception of the FM radio became poor quality
3- The mic of the unit when connected my Bluetooth to my I phone 5s became distorted to the other call party
4- Wifi reception disconnected every now and then
what shall i do ?
ayman

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Fault with build in bluetooth audio router

I done a cold reset as thought this was my software build problem but the problem still remains so must be the bluetooth driver with the HTC touch pro 2/Rhodium
1) connect any mono bluetooth headset
2) under settings, you will see headset option to allow system sounds to go through bluetooth headset, tick this.
3) Now when the headset is in range any system sound will be routed to the bluetooth headset.
3) Run any app that uses the mic (Skype/VOIP/sound recorder)
4) The sound from the device will will be routed fine but you will notice that the mic from the bluetooth headset to device will not sound ok - the speed will be very fast like a robot.
If the bluetooth is making a standard phone call via the phone, it is perfect.
Anyone tried this and discovered this problem - is there a fix?
Anyone confirm this fault on their phone?
Fault when routing bluetooth system sounds
Hello,
I have this same problem again with my HTC Touch Pro 2 (and my bosses 10 months ago)
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Android head unit (Pumpkin KD-C0224) - Sound stopped working via music/video player

Hi All,
I have recently experienced an issue where the sound has stopped working (not going through car speakers) when in music, video or navigation app.
This used to work perfectly.
Sound works normally when CD inserted
Sound works normally when using radio app.
Video app plays video - but no sound.
Music app plays the mp3 tracks - but no sound - can see the progress bar moving along (music (mp3) on SD card - 8GB formatted FAT32)
Also have issue with the BlueTooth - connects to phone but seems to be around wrong way - it appears the head unit thinks it is in phone handset mode when it is not - as result can hear people talking through the car speakers but they cannot hear me unless i toggle handset mode, but then people can hear me talking, but i cannot hear them...
I suspect for whatever reason the audio out is being directed to Blue tooth or whatever
Has anyone else come across this issue, and if so is there a solution?
Device
Pumpkin 2-DIN
KD-C0224
MCU version: MTCB-KLD-V2.02
Model # : S07
Android Version: 4.2.2_01092014
Have you tried making your phone and the head unit forget each other?
NYCAR said:
Have you tried making your phone and the head unit forget each other?
Click to expand...
Click to collapse
Yes I have - same result
Have also tried
- resetting unit - factory reset
- pulling the power on unit for
Whatever the issue it appears to be persistent between boots....
Now there is another issue - won't display the feed from the reversing camera
The head unit switches into camera mode, but displays message "No Signal"
davek76 said:
Hi All,
I have recently experienced an issue where the sound has stopped working (not going through car speakers) when in music, video or navigation app.
This used to work perfectly.
Sound works normally when CD inserted
Sound works normally when using radio app.
Video app plays video - but no sound.
Music app plays the mp3 tracks - but no sound - can see the progress bar moving along (music (mp3) on SD card - 8GB formatted FAT32)
Also have issue with the BlueTooth - connects to phone but seems to be around wrong way - it appears the head unit thinks it is in phone handset mode when it is not - as result can hear people talking through the car speakers but they cannot hear me unless i toggle handset mode, but then people can hear me talking, but i cannot hear them...
I suspect for whatever reason the audio out is being directed to Blue tooth or whatever
Has anyone else come across this issue, and if so is there a solution?
Device
Pumpkin 2-DIN
KD-C0224
MCU version: MTCB-KLD-V2.02
Model # : S07
Android Version: 4.2.2_01092014
Click to expand...
Click to collapse
To offer you the best customer service, we will send you the return address for full refund of your order.
I also have a Pumpkin KD-C0224 head unit and it works really great, does way more than you need it to do. (http://www.amazon.co.uk/Pumpkin-Capacitive-Multi-touch-Navigation-Multimedia-y/dp/B00OB90SOY/)
1. About the sound issue, perhaps there is something wrong inside of the unit.
2. About the Bluetooth, you can try settings-》backup&reset, then do the “factory data reset to see if it can help.
3.About the "No Signal", I have encountered this issue and Pumpkin sent a video instruction http://www.youtube.com/watch?v=lu8maRNrtlk
PS:You can ask for help from Pumpkin and customer service has been very good.
Android 4.4.4 Car Unit S07 sound problem
Hi to all,
I have a similar problem. My device is a Universal 2-DIN, Model: S07
Lately I had a problem with sound coming from sd-card. The quality of sound was good enough for some time and few minutes later, the sound coming only from one speaker, then transfered to another speaker then the listening becomes very bad and suddenly comes back very good as in the beggining.
That was in the past because now there is no sound at all.
More specific:
I have sound in Bluetooth, CD-DVD, Radio and the touching clicks (on device).
No sound at all from the device such as NAVI apps, in 2 sd-card slots and 3 USB's (2 back, 1 front). Of course I see video but without sound and the music plays mp3 once more without sound
I have already done the following:
I opened the device, unplug and plug-in again all the ribbon cables. Factory reset in Android 4.4.4, upgrade to 5.1 lollipop with reset to factory settings again, and finaly downgrade back to Android 4.4.4 with reset to factory settings again. The problem is still the same.
Is it damaged ribbon cable ? or other hardware problem ? because I don't think that is a software problem. Any opinion is helpfull.

Kgl 5 sound problem

I have a MTCM KGL5 v2.55 android 4.4.4 headunit and the radio and gps sound first became scratchy and distorted but now has stopped working. If it is cold it will be scrstch and distorted but off if warm. The dvd, bluetooth. Sound is just fine. Anybody have any idea what is wrong andhow to correct. Help appreciated.
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I went into the factory settings and in the audio section. I set the radio to 1 from the original 16 and now the radio plays well.

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One last cry for help before I drop-kick my head unit into the lake!
Do you have an MTCB or MTCC RK3188 HU that connects via bluetooth to an android 7.1 (Nougat) smartphone and allows you to make/receive calls via the HU?
If you have, what HU ROM are you using and do you need any additional apps to make it work?
I have an MTCC RK3188 HU which worked perfectly with my Xperia Z3 for calls over bluetooth but I can't get it to work with my Xperia XZ Premium and I've tried loads of ROMS, MCUs and bluetooth/MTC service apps.
Desperate! Help! Please!
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The headunit is using the stock shipped rom with a build number of 08122014 running 4.4.4, MCU 2.16. I used the Bluetooth app that was installed on the HU to sync the phone and connect the phone to the stereo. I didn't try calling out, but I answered a call using the stereo. The phone played it's ringtone, but the stereo did a normal phone ring.
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PX5 MTCE Hizpo 4Gb RAM 32GB ROM radio app error

Hello every one.
I have a problem with my HU its a HIPZO MTCE octa core android 8.0.0.
The problem is that the radio application does not always work. Sometimes it works normally but most of the time the application starts but no sound is heard or tuned to FM or AM stations.
When it is working incorrectly it will not be corrected even if I turn off and then turn on the device or engine of the car. The next day it may work and it may not, 1 to 10 work OK.
When it is working properly, there is no malfunction until I switch off the head unit or the car.
Can anyone help please?

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