Headphones cannot hear sd card playback

CQ CQ Troubleshooting
1

I am trying to listen to multitrack recordong on headphones on the CQ12T but no sound.

2

Multiple point to look at here:
-setting of the source for headphone out (prefer Main L/R)
-source of the channel you want to listen from de SD, set them to digital each.

3

Thanks. My problem was not understanding how the CQ plays back recorded channels. Have to select each channel for USB/SD then set levels for each to mains (and outs 1-6 if needed) before any sound comes out. This was hard for me to understand at first.