i have at least two obvious issues/bugs,
EDIT, both issues were user error or at least unfamiliarity.
so this is solved.
- i discovered dvol is Delay Send volume
- 2nd issue was due to not realising each LFO can be pointed at any track, so i basically only considered teh track 15 LFO
i have 2 synths running into inputs a/b, when i use delay on either, it sporadically also triggers reverb.
also, on one kit preset, (only the one kit)
machine 15 became corrupted such that the input always is distorted, it kind of sounds like a bit rate reduction, or a square wave AM.
this distortion first appeared when used as a input machine, but still exists on any machine voice i choose.
it also only appears when routed through the stereo master output, if routed to a or b, the corruption is not present.
it is particularly present on ONLY the one kit, i can change overall machine kit and it disappears, but is saved in the problem preset, so i cannot get rid of it.
here is an example of 3 different machine voices used on the same corrupt track 15.
in each example i simply copied the machine from another (uncorrupted) track onto the corrupted track, and recorded an example of the clean, and the the corrupted
first 2 are drum machines, 3rd is a synth input