[sdiy] NCO Jitter (was Large Numbers)

[O Gillet]

> The BLITs and BLEPs deal with the aliasing you get from sharp edges. I am more concerned with the jitter you get from the mathematical residue of the ratio of F/Fs. In my experience it is an issue mostly with sawtooth waveforms. Triangles and sines seem to have much less trouble.

BLITs and BLEPs deal with both, because they are two facets of the
same problem (sharp transitions happening in-between samples).