(trying to understand the other one's problem - parallel vs serial vs asymmetrical)
To keep it simple in debug, I created a fixture with only 16b PAN.
in EFX in ABSOLUTE mode: the EFX parameter 'width' stands for 2x the width in real life <- BUG ? (width 10 = reference position - 10 and + 10 -> equals a width of 20)
https://youtu.be/jxP4AR8asZQ
real life == FROM (real-life reference - width) TO (real-life reference + width) - you'd expect 1/2 width from reference
in EFX in RELATIVE mode: works the same (effective window == 2x the setup width) but have a look at the timing issue here ... (and the end-value of the fine channel != the full 255b resolution) [edit: ONLY 127 fine value here ??)
https://youtu.be/ukff2pq3ib8
Win10 - latest build - jadiejadiejadie processor and GPU - believe me ... powerful computer = Intel i7 NUC + GPU & 32Gb whistels and SSD 512Gb HD blowers...
(I believe it only counts to 127 in fine channels and the rest of 127 -> 255 is pause)
now comes the thingy - serial mode on
One would expect that in serial you get like a fan base action - that is 1 goes, 2 follows retarded, 3 and 4 and so on...
Seems that the serial-setting in an EFX is doing it's thingy - but not expected to end up with negative values vs 'the window we set up' ... this is lighting chaos in real life...
https://youtu.be/vndeE-erCnk
Channel 2 and 4 ends in 'negative'-relative values <- Wut?
With EFX option 'LINE2' that is ... since this debug report I kept it simple = only PAN
[edit: to keep it simple I only used a fixture with pan here - fixture: oh crap ... have to zip the thingy]
https://www.dropbox.com/sh/o1k4txb6jg5h ... FTQMa?dl=0 <- project & fixture - copy to respective locations please