Sound only on one channel on the analog output

[Waax]

Hello
I just bought a Wetek Play box (Openelec V6.0.1, Kodi 15.2). When I connect speakers on the audio output (3.5mm jack) I get sound only on one channel and not on both. I verified that the speakers are working correctly.
Can it be that there is a problem with the audio driver? I am new to kodi and linux but I could find the audio output device set to: default (AML-DUMMY-CODEC S/PDIF). Is there another driver that I can use and how do I install it? Or do I have a hardware problem?
Thanks in advance
waax

[chewitt]

I have vague memory of someone posting before that although this is 3.5mm it's not a normal audio out jack and you need to use an adapter else the pin alignment inside the jack isn't correct for a conventional stereo plug. It's possible I'm recalling some other piece of hardware.. but that popped into mind.

[Waax]

Hello

Thanks for the message. I opend up the box and yes - the connector is not a normal audio out jack with 3 poles. It has 4 poles and therefore I didn't have sound on the second channel. I need to make an adaptor.
Greetings
Axel