“Sample locking” is the ability to take a track, that already has a sample assigned to it, and parameter lock different samples for different triggers assigned to that track. It allows a single track to play multiple samples instead of only being able to play one sample.
People are discussing a work around by using “sample chains.” “Sample chains” are samples created by chaining a bunch of smaller samples together into one longer sample; the different samples can then be selected by using the sample start parameter. FYI, when using “sample chains,” they must be arranged in a manner for the 120 subdivisions (of the sample start parameter) to line up with each sample’s beginning.