Acoustic feedback (back coupling) while calling

C

Christofson

New member
Hey folks,
since I have installed theVLINEV2 in my SAAB 9-5 NG everyone who calls me tells me they can hear themselves with a little delay what is very annoying. Today I called my wife while she was driving in the SAAB and it is really bad. Inside the car everything sounds quite normal. Using the supplied GROM microphone which I installed next to the rearview mirror.
Any ideas what could cause this problem?
 
Hello,
You need to adjust the microphone gain. If you are using the GROM-supplied microphone, the best position is around 45. To adjust the gain - while in the VLine user interface, tap on the sandwich menu at the top left-hand corner. Then scroll down to the Microphone Gain settings.
Here is how to:
https://youtu.be/ODCCTMaSUM4

Adjust it to your liking, but 45 is the best setting for aftermarket microphones, according to our recommendations.
 
Hey Heath,

thanks for your support!
I tried to do the „auto“ calibration as shown in the video but it gives me the following message after one peep:
„music tone is not sensed“
do I need to turn the volume up even louder than it already is? IMG_5416.jpeg
 
Hello Christofson,

The "Automatic Microphone Adjustment" might not always work well at 25% depending on multiple variables in the vehicle, including cabin size/volume and audio system configurations. Normally I would suggest putting the volume around 25% and slowly working up to 50% if it's not being sensed. If the signal is still not being sensed via the "Automatic Microphone Adjustment" at 50%, there might be an issue with the microphone itself.

Can you contact us via Ticket so we can follow up with you? We might need to send you a replacement microphone or look into retaining your OEM Saab Microphone.
Here is where to contact us via Ticket:
https://gromaudio.com/support.html

Thanks,
Heath
GROM Audio
 
Hi folks,
received the new microphone and the new harness - delivery worked flawless, thanks a lot.
I replaced the harness and I can now use the OEM microphone which is great - unfortunately the same problem still appears.
Callers hear themselves (with a slight delay) twice - like an echo.
i still have two ideas (not tried yet) but this would be just a temporary fix for me:
- use wired car play/android auto (instead of wireless)
- turn off the Harman/Kardon sound processing

any other idea what could cause this problem?

btw: the auto volume leveling of the OEM microphone works like a charm now.

thanks a lot,
Chris
 
Have you tried adjusting the microphone gain manually? Please set it to 45 and give it a try.
 
I have tried it now with a lot of different gains, 45 and more and of course less, doesn't fix the problem. I have tried it with the new microphone from GROM, with the new harness to ingtegrate the OEM microphone, nothing helps.
Caller does hear me and I can hear the person who's calling too pretty clear but caller always hears the echo. I can't hear any echo at all in the car.
Tried it via bluetooth and wired, switched on and off the audio processing, problem still occurs.
No matter if iphone or android.

Absolutely clueless what I should try next.
 
Hey folks! This problem still occurs and in a bigger SAAB car forum for 9-5 NG (2010-2011) a lot of people have the same problem. No matter if you adjust the microphone gain or the delay, the echo always stays. It seems there is one work around (at least for apple Car Play users) to connect to the original UHP and allow to access the contacts on the phone. When connecting the phone to the VLine you must not allow to access the contacts. Whatever this triggers, the echo seems to be gone!? Maybe the VLine is not taking the calls via car play then but via the original UHP? Unfortunately, this does not work for Android Auto since there is no feature to "uncheck" the contacts while pairing the phone to VLine. You can switch off the 'call' function in the Bluetooth menu of the VLine (on the phone) but then the VLine is switching to the original UHP while calling and no maps or other functions are visible what is no good solution. At least there is no echo while calling. Is it possible the VLine is accessing the microphone of the car and the smartphone at the same time? I was also trying to play around with the delay (ms) but this doesn't eliminate the echo.
 
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