animation – Aseprite “Duration” vs Unity “Samples”

The “Samples” field is short for “Samples per Second”

So if you’ve set your “Samples” to 60, then each tick on the animation timeline represents one sixtieth of a second, or about 16.6667 milliseconds.

To make your life simple, you could set your “Samples” to 1000, then each tick is exactly one millisecond, and you can copy over your keyframe positions unchanged from a program that presents them in millisecond timings.