Re: Balanced Audio

Posted by Ziq on Dec 03, 2015; 8:30am
URL: http://bluesaab-forum.90.s1.nabble.com/Balanced-Audio-tp35p51.html

If stereo is not so important, wouldn't it be possible to connect one output from your BT-module to both inputs? Otherwise, if you are not so much into making your own circuits you could probably find something good enough on e-bay, example.

I have jacked up my RN52 to the CDC connector in the trunk. I've put an adapter to i dSub9 so in between so that I exchange to board with a USB-CAN device.

Sound is playing but I have two issues with it.

1. Sound volume is very low, I need to put maximum volume on both my phone and head unit for an OK volume.

2. There is noise on the audio line. I've narrowed the source down to the CAN-bus, if i disconnect the cables from my CAN transceiver the noise disappears (playback continues until the head unit realized no CDC-status-messages have come for a while). If playback volume hadn't been so low I don't think this would be much of a problem, now it's unbearable. In the wiring from the CDC-connector to the head unit the CAN-wires seem to be next to the other wires so I suppose noise transferring between the cables should normally not be a problem. I'm suspecting either my adapter cable or the fact that I've mounted everything on a breadboard (=big capacitor..).

Am I alone with these problems?