XS3868 ver 3.0 Bluetooth Stereo Audio Noise After 5 seconds idle

[ESXi]

Hi,

I have recently modified car radio case and added a a2dp module from eBay to it. It is the XS3868 ver 3.0.

But I have one problem. The sound works, the buttons too. But when I play sound using the a2dp profile (audio sink) and pause a audio track or don't play audio at all after 5 seconds a hum/buzzing sound starts (around 50hrz).

It is the same problem as another person had on eevblog.
Post #15 about the noise introduced after 5 seconds idle using Android a2dp profile, is the same as what I have.

Topic:
https://www.eevblog.com/forum/beginners/bluetooth-audio-someone/

Here is the diagram (shown in the video on the prototype board)
http://i.imgur.com/R752N7X.png

I have tried to hook it up to another amp, same problem. I tried headphones and those work without the buzzing sound after 5 seconds! I don't understand why..

Video of the buzzing sound:
https://youtu.be/9YBVj6Cl-cE

What am I doing wrong here, or what do I miss?
Maybe adding two 220n ceramic caps to audio out, will this really improve it?

Best regards,
ESXi

 

[ESXi]

Problem solved.
XS3868 / OVC3860 5sec idle noise. Help needed - Page 1

 

[rrv1987]

OVVC3860 Noise problem

i am facing the same problem here. i have put the 4.7 capacitor in 20th pin but noise remains the same

 

[silelis]

The OVc3860 audio output is differential. So If You connect it to amplifier You should do this as differential input.
In fact on AGND of OVC3860 is avarange 0.6 V.

 

[amirmbn]

i fix this problem i use two 560 ohm resistor

An externally hosted image should be here but it was not working when we last tested it.