Is the OP-1's resolution sample accurate? Surely not? Yet that one does it, so I wanna believe it's possible - but then, I have no idea how difficult such a thing might be. Obviously, it's not up to you to do it, but rather to Elektron to make the DT compatible.
My current solution is to look at the looped wave in my sample editor (Wavelab or DSP Quattro, usually) and to try to match the approximate position of the loop points visually on the Digitakt. I can then fine-tune the loops until I get roughly the same results.