An awesome feature i use a lot is to draw simple “chipped” waveforms in the sample editor - select the “draw” button and click on an empty instrument slot, a box appears asking for the size, frequency, etc. of the new sample to be created… except on higher notes, the aliasing is more noticeable in Renoise 3 than it was in 2.8 (or is it just my imagination)
…anyway, the default for drawing a new sample is 168 samples long, with a base note of C-4. The saw/sine/square/triangle .XRNI’s in the “Elements” directory are i believe 672 long with a base note of C-0, and they sound much better when playing high notes. Why not make this the default when drawing new samples?