yashsingh1/xdaforums huggingface dataset:
[Android Head-Units] mdc2500:
Hi All

I installed the High Quality external Microphone ( Pioneer- see my post above ) on the Junsun M8925 and can report the following after extensive testing :

- Bluetooth Connected Telephone calls on both Apple and Android phones the voice sounds good with the Pioneer MIC

- Android Auto ( Connected via USB CABLE) Telephone voice sounds good and just as good as via Bluetooth

-Apple Carplay via usb cable and the Voice on phone calls is crackly and very poor :mad:

I have tried the following to see if Apple Carplay Voice can be improved:

-Unplugged and reseated the Apple Carplay USB cable

-Reset the entire Junsun device

Unfortunately none of this has helped and Phone calls using Apple carplay is terrible and unusable. I cannot diagnose if it is a software issue with the Junsun Apple Carlink software or poor quality USB connection with the apple carplay usb cable. In any case I am done with this unit and will be returning and requesting a refund from Junsun. Its a shame because everything else for me at least has worked very well.

Cheers

Marc
[Android Head-Units] rav4junsun:
Hey everyone! There is a solution with an external microphone. I’m using a high quality external Sony mic plugged into the 3.5mm Jack. This improves the quality BUT is not perfect yet. Why? The internal mic is interphering. I found this out by tapping on the internal mic with my finger nail while on a call. Also forums of other head unit brands state the same. Does anyone have a video instruction on how to physically disable/kill/remove the internal mic?
[Android Head-Units] mdc2500:
Below is a link to a video Junsun sent me on how to reseat the onboard Mic

https://drive.google.com/file/d/1zhh-hWVGAM_uowCgcPnZBa0KrsZkL35Y/view?usp=sharing

Be interested to hear how the external Mic works after disconnecting the onboard mic.

Cheers

Marc
[Android Head-Units] rav4junsun:
So I need to remove that complete board? This won’t break anything beside the microphone? I’m not a technician and don’t want to do anything wrong 😅
[Android Head-Units] mdc2500:
Sorry I do not know if that board does anything else. I sent a message to Junsun about the mic sound and they sent me the video on how to unplug and plug back in to see if it fixed the sound issues
[Android Head-Units] mdc2500:
Junsun sent me an Image on how to adjust the phone/Mic volume. I am going to give this a try although I do not think it will help my issue :
[Android Head-Units] FUzuner:
i have the same HU. The only problem is the internal mic do did you tried is? did it work?. ive got this crazy cracked sound. I want to disable the internal mic but i dont know how.. please someone help
[Android Head-Units] spidersxx:
I have xtrons unit on vw car and facing same mic issues on bt calls my voice isn't clear and delay 1- 2 sec on my voice.

Any suggestions ?
[Android Head-Units] PEUGEOT/3008:
Merci problème résolu mon micro fonctionne parfaitement
[Android Head-Units] JoTaSu:
Could you indicate the model and purchase link of the pioneer microphone that you indicate works well on android?
[Android Head-Units] mdc2500:
Pioneer CPM1083​
[Android Head-Units] pad781:
Hello all !

A long time after this post, I put an external Mic on my Junsun V1 Pro and I desolded the Int mic. I let the card because there are others fonctionnalities covered. And now, the mic works well. I can call without any problem. Thanks a lot to all contributors !
[Android Head-Units] marchnz:
Nearly every Chinese origin greybox makes the same error with the mic.

When installing an external the internal must be removed

Goes back to wince u it's

This has been posted about for years
[Android Head-Units] Y9D:
I was able to solve my audio problems with phone calls in CarPlay by doing this workaround:

I purchased a uni-directional microphone. Nearly all mics out there are omni-directional.

I also disconnected the small board containing the built in mic. That caused only thie uni-directional mic to be used. The result was that my audio improved dramatically.

The important thing to know is you remove the built in mic is this: That small board also controls the buttons on the left side of the unit. This has not been a problem for me because I use other buttons to accomplish Volume, Home Screen, etc.
[Android Head-Units] TorstenH:
You should desolder the mic from the small board - not remove the whole board and loose functionalities.
[Android Head-Units] Y9D:
Yes, I will do this. I don't own a soldering iron or any other accessories, but maybe this is a good excuse to get one! Thanks!

EDIT: Just ordered an entry level soldering kit! $20 USD
[Android Head-Units] TorstenH:
Don't forget to buy electronic solder. When you apply some new solder to the soldering tip, the flux it contains will help melt the old tin. If you want to do more soldering in the future, a desoldering suction pump is a good investment.

The soldering iron doesn't have to be expensive but please don't buy such a crude soldering gun.
[Android Head-Units] Y9D:
Cancelled purchase. Will do more research on this. Thanks again.
[Android Head-Units] Jetblack31:
Hi,

I've installed firmware V36 on 8667 V1pro 8/128 and the internal mic works well. I've set BT mic Gain to the max (63). Obviously there is a lot of audio processing. My voice is a bit modified but people calling hear me clearly, even when driving. The background noise is well suppressed.

Jetblack
[Android Head-Units] Y9D:
Great! Can you provide me a link to that firmware? Any other "fixes" or enhancements after updating?
[Android Head-Units] Jetblack31:
I found the firmware in the forum, I will try to find it again ;)

This new version is based on Android 11, and the stock car launcher has been updated to a new UI.

And there's a reboot function available through the UI !

Jetblack
[Android Head-Units] Jetblack31:
Here : https://xdaforums.com/t/firmware-junsun-v1-8667q-8g-128g-vhd-qled.4405475/post-87399311
[Android Head-Units] justalone:
Hello,

I've V1 Pro 4/64 model FF_866X, where did tou download latest firmware?

Gerald.
[Android Head-Units] justalone:
Thanks.
[Android Head-Units] Orih1987:
Hi everyone, I love the Junsun V1pro and found that the only disadvantage is the faulty internal mic. Would love to understand what fixes worked best for you
[Android Head-Units] TorstenH:
Desolder the internal mic and use an external one
[Android Head-Units] Orih1987:
A job

A job for a solder rookie?
[Android Head-Units] TorstenH:
Not a complex job if you don't try it with those crappy cheap solder guns from the hardware store.

Another option you could try is to adjust the setting in the engineer menu.

This video is just for reference. On Junsun you have to use the code 8877 to access engineer menu. Don't forget to note the original values to be able to restore the settings.

And here's a video to show how to open dialog to enter such a code on head units like yours.
[Android Head-Units] Orih1987:
Well.. I was surprised that the board on the left only I charge of the mic, rst button and the touch buttons lights... The touch buttons functionality works completely without the board and seems that leaving only external yet simple (5$) mic is already doing positive impacton the call quality
[Android Head-Units] TorstenH:
Short instruction how to easily remove/disconnect the internal microphone:

Post in thread 'Junsun V1 MTK8259 - the adapter battle (Kia Ceed Jd) / OEM camera usage / reference thread' https://xdaforums.com/t/junsun-v1-m...-usage-reference-thread.4236281/post-87970225
[Android Head-Units] Orih1987:
Last question on this topic - what's the best external microphone with 3.5mm jack? I see Parrots are only 2.5mm
[Android Head-Units] TorstenH:
You could buy plug or socket made for soldering and modify the parrot or the wiring harness of the head unit.
[Android Head-Units] le_mi:
FYI

https://xdaforums.com/t/junsun-v1-pro-mtk8259-4gb-64gb-android-10-headunit.4193061/post-87996511

You can test it with a audio recorder app.
[Android Head-Units] Spectre93:
Hello, I have same problem with my sprd ums512_1h10_natv, my microphone loses volume and I can't increase it, does you found the solution ?
[Android Head-Units] Orih1987:
First of all - thank you so much TorstenH! Your guidance helped a lot!

I desoldered the internal mic, purchased Parrot and 3.5 connector - and sound is extremely better. Now the only problem left is the delay when using Apple Carplay. Any ideas? It always seems the other side of the call takes 2 seconds to respond.

Thanks in advance
[Android Head-Units] TorstenH:
Thank you

I'm happy to read that

Unfortunately I'm not familiar with Carplay because I'm an Android fanboy 😂, so I just can give a very generic answer:

- change to way the phone is connected to the head unit (wireless to wired) if possible

- connect the phone to head unit just with Bluetooth (no Carplay) and make a call. Still lagging?

- ask Google if Carplay lagging occurs with OEM (non-Android head units). Maybe changing a phone setting can help.
[Android Head-Units] f3zz:
Hello! Thank to this thread i desoldered my mic on the headunit and use an external mic instead. And the quality improved VERY much. Thank you!

BUT, when i put everything together again, there is no FM signal. And if I go to menu 8877 and hardware testing the FM Reciever is grayed out. :( Anyone got any tips on this? I dont know if it has anything to do with me desoldering the microphone.

The FM was working before anyway.

I have also doublechecked the connection to FM car antenna.

Thanks!
[Android Head-Units] TorstenH:
I can't see a correlation of FM receiption and microphone. Never heard about such an issue after desoldering the mic.

Additonally I don't think the radio in Mediatek engineering settings is relevant at all.

You should:

- triple check the connections. Maybe you missed the power supply of your antenna.

- check radio settings in 8878 menu
[Android Head-Units] Arotogo:
Hello, everyone.

I have a Junsun v1 pro purchased in December.

The built-in microphone picks up very low sound. The radio when connecting the external microphone does not pick up any sound, neither in the external microphone nor in the integrated microphone. Of three different microphones that I have tried, I have only managed to get one of them to be heard, but this is the microphone that takes the hands-free wired headset of a smartphone, but it picks up very low sound as well and is not designed for this.

Can you help me?
[Android Head-Units] TorstenH:
You can try again after disconnecting the internal mic.

Junsun V1 MTK8259 - the adapter battle (Kia Ceed Jd) / OEM camera usage / reference thread

I bought the Junsun V1 head unit but my Kia Ceed JD had a OEM nav unit which isn't directly compatible to Junsun V1. So I re-wired the wiring harness based on the pins description of my original OEM navigation unit. I'm only modifying the wiring...

xdaforums.com
[Android Head-Units] Arotogo:
Thanks for the reply.

The Chinese seller recommended that I unplug and plug that board. When I had it disconnected, I tried the microphone of the hands-free headphones of the smartphone. I didn't notice a difference.

I'll try to do it with a normal microphone.
[Android Head-Units] TorstenH:
Good idea. This will disable the background light of the buttons but that doesn't matter for a temporary test.

Let's see if it's better with an external mic. My expectation is, the head unit works like a Bluetooth headset so its microphone (or mic connected to the hu) and its speakers (your cars speakers connected to the hu) are used.
[Android Head-Units] Arotogo:
I check it and comment result.

Thanks
[Android Head-Units] Arotogo:
Good morning.

I have disconnected the integrated microphone board and connected the external microphone, it does not pick up any sound, it stays muted (the same as with the connected board). It is as if when connecting the external microphone the radio detected it, but did not know how to choose that microphone.
[Android Head-Units] TorstenH:
Usually both microphones are active in parallel. Can you test with another external microphone?

You could install a simple recorder app like

Audio Recorder - Apps on Google Play

Audio Recorder with custom path selection and editing, no ads, open-source

play.google.com

on the head unit to test the mic.
[Android Head-Units] Arotogo:
Today I have tested it with two different external microphones (one that is already installed from the previous 2din android and a new one that I bought). More than that, I had previously tried it with another external microphone and a hands-free wired headset from the smartphone (the latter did work, I picked up the sound very low but they worked).

Regarding the application to record sound and the tent installed. When the external microphone is connected, regardless of whether the built-in microphone is connected or not, it does not record any sound. Even turning the volume all the way up you can't hear anything.
[Android Head-Units] Arotogo:
Hi.

I've gotten it to work with the fourth mic I've tried. The latter is trs. With the ts and trs adapter on my computer it doesn't work.

In any case, although it is heard better, it is still heard very low. Do you know of a way to increase the microphone gain?
[Android Head-Units] TorstenH:
Post in thread 'Microphone problem in bluetooth phone calls Junsun V1 Pro' https://xdaforums.com/t/microphone-...one-calls-junsun-v1-pro.4166471/post-87963427
[Android Head-Units] Arotogo:
Thank you.

My radio doesn't give me that option, the code to access engineer mode is: 123456. Once inside and in hardware testing, it doesn't give me that option and the options it does have are none of it useful for me to correct the microphone.
[Android Head-Units] TorstenH:
You should share your device specs by using CPU-Z.
[Android Head-Units] Arotogo:
Hola

La aplicación cpu-z no funciona en mi dispositivo, he instalado otra en su lugar.

Estos son los datos de la radio.

Adjunto video del modo ingeniería.

Mod translation:

Hello

The cpu-z app is not working on my device, I have installed another one instead.

This is the radio data.

Attached video of engineering mode.

Spoiler content hidden.
[Android Head-Units] TorstenH:
Here you can download and install a newer firmware on your own risk

TS18.2.2_20221114.161350_WINDOW- THEME1.zip

Microsoft OneDrive

onedrive.live.com
[Android Head-Units] Arotogo:
Will this update give me the microphone volume option?
[Android Head-Units] TorstenH:
No glue because I don't have the same HU as you.
[Android Head-Units] Arotogo:
Ok. Thanks
[Android Head-Units] Arotogo:
Hi.

I have installed the update without any problem. At first glance, everything seems to work fine.

But the microphone is still low volume and engineer mode still doesn't give the option to increase the volume.
[Android Head-Units] TorstenH:
You connected already an external mic and disconnected the internal one. Right?
[Android Head-Units] TorstenH:
You already tried apps like

You already tried apps like this:

Hear Boost: Recording Ear Aid - Apps on Google Play

Get Super Hearing! Record & Boost Sound. Microphone Volume Booster for Audio

play.google.com
[Android Head-Units] Arotogo:
I've tried three, but they only work with the app open in the foreground.

Perhaps it is that the application is not configured correctly.
[Android Head-Units] TorstenH:
That means if you run such an app in foreground you can make a phone call via Bluetooth and your conversation partner can understand you?
[Android Head-Units] Arotogo:
Don't know.

When using apps with this feature, what you were doing was recording in the same app that was boosting the microphone. In the recordings, the reception of the microphone did improve.

I never made a call, since it did not seem safe to call or answer a call with the car moving and pending the application.
[Android Head-Units] TorstenH:
Just for testing purposes you could try with this app:

Microphone Amplifier APK for Android Download

Microphone Amplifier 1.6.4 APK download for Android. Discover the small voice around you and high quality wav format recording.

m.apkpure.com

Sure not while driving!
[Android Head-Units] TorstenH:
What's behind System Settings and Performance Utils?

Maybe you've just overseen the relevant setting...
[Android Head-Units] TorstenH:
Which options are available here and in the other menus?
[Android Head-Units] TorstenH:
One more you could try:

Post in thread 'General FYT based Spreadtrum uis7862 (unisoc ums512) - Q&A, Mods, tips, firmware' https://xdaforums.com/t/general-fyt...-q-a-mods-tips-firmware.4396339/post-88364523
[Android Head-Units] Arotogo:
I will try the app you recommend.

I will make a video of the engineer mode menu.

In the voice setting, there is only for mixing sounds from different apps and choosing the app that speaks. I will do photography.

When I have all the information I upload it and comment.

Thank you.
[Android Head-Units] Arotogo:
In this thread I was already asking, because I did not know that it was a different program. In the FYT they fix it by adding folders through the usb, as an update on our device. On our device it is not executable.

They couldn't help me.
[Android Head-Units] tolisz78xda:
Dear all. I have I Junsun v1 pro and I am facing the same problem .when the car is moving they can hear everything except my voice. Have anyone of you try except or desolder the mic to insulate it with a textile (cloth) tape? As I have understand the reason when the car is stopped they can hear us but when it’s moving they cannot it’s the vibratios of the car that transfers inside the radio and create this noice. Even the external microphone if it’s armed to a hard material creates surround noises from the vibrations. I believe that if we insulate those vibration the sound will be better.
[Android Head-Units] TorstenH:
According to my experience disconnection the internal mic is the best option.

In my case, it was even the case that the vent is too close to the internal microphone.
[Android Head-Units] tolisz78xda:
Maybe it’s the fan.! Mine does not have a fun but despite that I have surround noice.!! Before I open the multimedia I will order a better quality external microphone to see if there is a difference.! I will tape the radios mix externally and we will see..!! I need half a day to dismantle it from my car remove it from the plastic case and isolate the internal microphone..!! Maybe I try to press them to send me a new cart to replace it but I am not sure that this will solve the problem. I have read that some radios had perfect sound from the beginning..!!
[Android Head-Units] TorstenH:
I'm sure your car has. I'm not talking about fan on or inside the head unit.

Easy to access:

https://xdaforums.com/t/junsun-v1-m...-usage-reference-thread.4236281/post-87970225
[Android Head-Units] tolisz78xda:
Thanks you Friend. I’ll see what can I do and I will be back. When you desolded the internal microphone you are not having problems with your mic? Even if your car runs with high speeds?
[Android Head-Units] TorstenH:
I never run my car with high speed because I don't live on a race track and love our nature 🍃

Nevertheless I don't have problems with my mic.
[Android Head-Units] Serg039:
Hello! I will try this option.https://www.aliexpress.com/item/326...o.order_list.order_list_main.4.1a8018029EjlGf
[Android Head-Units] PLANET007:
What microphone did you buy?

Also tell you that when I enter engineering mode I cannot modify the values because nothing is displayed.

I attach image

Thank you for all you do and try to find solutions to our problems.

Sorry for my english translated with google
[Android Head-Units] TorstenH:
I'm using the OEM mic because my previous head unit already comes with that feature:

https://xdaforums.com/t/junsun-v1-m...-usage-reference-thread.4236281/post-84533475

But some users reported that recycling the desoldered mic by connection it to the external 3.5mm jack brings good results.

@Orih1987 preferred a mic from Parrot. For sure makers of good microphones:

https://xdaforums.com/t/microphone-...one-calls-junsun-v1-pro.4166471/post-88169869

That's weird. Do you have a MTK825X device? In meantime we know that a Junsun V1 Pro is not a Junsun V1 Pro is not a...

No problem. Often non-natives are better to understand. 😊
[Android Head-Units] tolisz78xda:
When I say high speed I mean 80-100 km/h not 200 I’m/h. I have a small car not Ferrari..!!even at 60km/h I have problem with the mic.
[Android Head-Units] TorstenH:
I'm just kidding. 😅 Not expected you're a Formula 1 pilot.
[Android Head-Units] tolisz78xda:
Mine multimedia is android 12 and has different menu than the others .it’s the v1 pro.!! How can I find the type like you wrote before MTK825X?
[Android Head-Units] TorstenH:
Install app CPU-Z and post platform, manufacturer and CPU data by making readable photos.
[Android Head-Units] tolisz78xda:
Ok thank you..!!
[Android Head-Units] TorstenH:
Have you ever tried another, maybe oder phone of another brand?

E.g. I found several post for relatively new phone Realme GT2 pro which has problems with handsfree BT microphones (car units and headphones). Maybe we try to find a solution for the wrong device here...
[Android Head-Units] tolisz78xda:
I have tried 2 phones with the same results.!! This I am using all the time is an iPhone 11. Also on this I have problems..!! I told you my opinion is that the problems are from vibrations of the car for that reason it’s worst when we increase the speed .!! The mic is attached on the plastic and the plastic as a hard material transfers the vibration from the frame of the car to the mic .!
[Android Head-Units] TorstenH:
Okay!!
[Android Head-Units] rabbited:
I am testing out changing the values in /vendor/etc/audio_param/MicInfo_AudioParam.xml on my Xtrons 8667Q. I already snipped the wire on my internal mic but I have a feeling I could have changed these settings to turn off the mic instead. Does this same file exist on the Junsun V1 models of the same chipset? I don't have engineer menu access, so I'm not sure what similarities exist in software vs chipset. I had assumed originally that it was just a rebranded unit.

EDIT: for anyone with this unit Engineer Menu can be accessed by the code in the phone app by typing *#*#3646633#*#*
[Android Head-Units] marekk84:
I read the posts and a question came to my mind: if the internal microphone is so bad and needs to be desoldered, why don't we replace the poor-quality microphone with a better one inside? Has anyone here measured the impedance or any data of the internal microphone? If there is any information available, I would get a similar electret microphone because I saw a picture of the internal microphone during the desoldering process. If you have any information about the impedance, voltage, or possibly a picture of the internal microphone, I would be happy to receive it.
[Android Head-Units] TorstenH:
I have read that simply replacing the internal mic is possible. E.g. with one from a phone. But often the position isn't optimal so OEM mics are usually installed over the drivers head in the roof liner.
[Android Head-Units] marekk84:
I

I have a Ford car. Out of curiosity, I disassembled the factory microphone and it also has an electret microphone. It might be worth a try to replace the interior microphone, and if it doesn't work, then resort to desoldering. This is why accurate information about the built-in microphone would be useful, such as its parameters. Here is a picture of the factory Ford microphone.
[Android Head-Units] TorstenH:
Why not keeping the Ford mic in place and connect it via the 3.5mm connector to the head unit?

I did the same and result is good:

https://xdaforums.com/t/junsun-v1-m...-usage-reference-thread.4236281/post-84533475
[Android Head-Units] marekk84:
I was thinking about the same thing, but I need to delve deeper into the wiring of the car to see where everything is located. It would be great to tap into one of the wiring harnesses near the head unit as it would be easier to install. However, I still don't have the documentation that shows me exactly where everything is located.
[Android Head-Units] TorstenH:
You should try to find the pin description of your OEM radio. I found my by Google for the model number with keyword "pinout".