How to do “repeat all” for Multitrack sounds?

I have an art installation and need different sounds at different locations. I would like to use an LP-16 playing the sounds. From the connectors I then just need a cable to boxes at the location where I need this sound. Sounds like fireplace, wood, whispering, and so on.

For this each sound should be played through an exact one of the output connectors. Of course I need a repeat function, because we cannot press a button every ten minutes or so.

The documentation says I can choose a connector for each sound using the multi-track mode. I can choose “repeat all” in the stereo-mode. But I cannot combine those two features.

I heard other people have used LP-16 for such installations. I wonder how they could overcome this missing feature.