I threw together an online slice calculation tool for new Rytm users or anyone trying to get their head around how to use chains and slices on the Rytm.
You can find it here:
Basically it gives you a list of all the available slice counts for a Rytm sample chain, and when you pick one it shows you the start and end points for each sample.
It’s nothing fancy but it does the job. Of course if I’ve made one or more glaring errors, let me know and I’ll fix it up.