A samplechain (in OT’s convention) is a file created using a sequence of a predefined number of samples of your choice.
These files are placed one after the other placed equidistant, better done in a DAW of your taste.
The number of these samples are an equivalent of the slices available for Slice function inside OT.
Once you slice this samplechain in OT and use SLIC activated in Playback setup, you can trigger different samples (loops, whatever) using one Track.
This can be done using also sample-locks or Trig Modes set to SLOTS but with samplechains you save on Slots 