i need to play 4 channel audio from a video. i'm using a video source to light many strip led single pixel by artnet. I know that someone already wrote something in the forum, but i didn't understand well. So i exported a .mov Apple pro res 422 HQ with 4 channel audio. So when i play it on madmapper how can I link the 4 audio channel to 4 output of my audioboard? I thought that it could be automaticly but my audioboard still playing only LR channel.