The SEQ16 is a pitch and gate sequencer which is a bit different from other sequencers in that for each of the 16 steps you can choose only one of 5 CV settings. This may be a limitation, but it also makes it much simpler to program melodies because you don't have to tune each of the steps individually. There is also a setting for accents which can be used to add triplets and more triggers per step.
I think I have identified a bug in the SEQ16 module. I'm not sure if this has been discussed before, but I don't see it anywhere.
The expected behavior for P is that it doesn't gate, and the CV doesn't change. But this isn't what happens when the previous CV was ACC. When the previous CV is ACC, P's CV is set to the last non-ACC CV!
So for example, if you have the sequence V II P, then P's CV is II. But if you have the sequence V ACC P, then P's CV is abruptly changed to *V*.
If every note prior to P so far has been another P or ACC, as in P P P ACC ACC ACC ACC ACC *P*, then P's CV is changed to I.
This has a negative impact on notes with long envelopes. Pretty sure that's a bug! Needs to be documented in the Wiki.