Btw, n00bs. Do you find the envelope timings useful? I compared the values to SID envelope timings and it seems SID has a lot more variety in the fast end of the scale. With a SID you can get 0.5 ms, 1 ms, 3 ms, 5 ms, 10 ms and so on while in klystrack it's like 0 ms, 1 ms, 5 ms, 13 ms, 30 ms ... attack/decay times.
I was thinking maybe I should adjust the values so you get much sharper attacks and decays. I am not sure but I have a feeling a lot of SID tunes get their sharp sound from that alone.
Edit: Notes on the tutorial (which is great once again!):
Absolute arpeggio note is useful if you want to have e.g. a combined drum and bass instrument with the drum part always playing at the same frequency and then the bass part of course following the played note. This might fall in the "was useful in the 80s, not so much anymore" category.
Using 7Cxx (xx = tick where the release happens, just noticed the help box doesn't give any indication of this param) to release the note is useful if you want to release the note on the same row as you trigger it. I think I put it there for the Cave Story format importer to support notes that are half a row long. But of course if you are using quite fast speeds it's not that terrible to actually put the release on the next row. It's kinda the envelope counterpart of ECx.