On the subject of sample slicing, if you have an iPad you can use the STROM app to slice any samples as you like and then send the individual slices into your Rytm. You can then load them into your project. STROM also offers pitch change (can’t remember how many octaves), so by saving and transferring your samples at more than one pitch, you could effectively extend the octave range of the Rytm. For example, if you pitch a sample up +2 octaves in STROM before transferring it, you would still be able to raise it by a further +2 octaves in Rytm. Therefore, if you transferred both your default sample (+0 octaves) and the pitched-up sample (+ 2 octaves), you would effectively have a +4 Octave range across the 2 samples. And given that you can select different samples for every P-lock you set up in Rytm, you would only have to use one track to get this range,
Alternatively, regarding slicing using the Rytm itself, on the sample page you can set P-locks manually on the Start and End points for every trig, which gives you some functionality here. It’s fiddly and might not always lead to the ‘slice’ you want (I suppose it depends on how long your sample is and how many workable slices you want out of it), but it kinda works.
So it’s all about preparation, basically. This isn’t something you can do reliably live.
As for sequence transposition, maybe you could accomplish something using different scenes. If I recall correctly, you set up a whole new set of P-locks per scene. Therefore you could manually transpose the tuning of all your trigs (more preparation!) and end up with a different set of transpositions for every scene pad. So you could have a default melody line, then one that’s pitched up a bit on Scene 1, down a bit on Scene 2, etc. As long as you know the transpositions you want ahead of time, you can prepare the P-locks accordingly.
I think you can do a lot of stuff with Rytm’s scenes, performance mode and P-locks that arguably should have been easier functionality in the box by default, as long as you prepare and think creatively. Just writing the things above has been an interesting thought process for me - I’m still working out the drum synthesis and haven’t really dived headlong into the performance options yet!
One thing I would really like is to be able to set up new trigs for every scene. Elektron maybe think that you should make a new pattern each time, but for me it would be easier to switch to scene mode and hit the pads than fiddle around with bank changes and try to remember which pattern is which!