Keep in mind that the arp only works on midi tracks, and also consider that ‘plays free’ tracks are not connected to the sequencer transport, they can be triggered manually, this idea is just an extension of that but instead of manual, programmed and instead of playing the whole sequence it only plays a step per ‘step advance’ trig.
Just thinking out loud - could this be simulated already on a MnM or Digitone ? Both machines allow trigging of a linked track and the arps, depending on type/settings can be configured as “sequencers within the sequencer” as folks often say…
But you sacrifice a track ofc - could be a proof of concept?
Would love this-pretty simple “mechanism” with awesome funk results - Donato Dozzy acid style trig advance a neighbour track
I feel not yet confident to say… ‘ok, I’m there!’… But i might throw another example just to ask you if I completely understood…
I get back your first example : trigs on all steps 1to16.
Step advance on 1,7,10,14.
The pace of the sequence is 1,7,10,14 and each bar plays 4 steps because it’s the number of steps been put in step advance right?
So the first fours (1-4) on first bar with a rhythm of 1,7,10,14.
The second fours (5-8) on second bar with a rhythm of 1,7,10,14.
And so on… Right?
If i change the step advance sequence to, let’s say, 1,7,10 then I get each bar playing three steps (1-3 on first; 4-6 on second and so on)
Am I getting it right?
Sorry being dumbydumb but I love this place when let me learn something new and use of my brain and its last neurons
Yes, that’s it!
Great idea!
Could also extend it so the step trig page has a parameter where you can set which step gets trigged (default would be “NEXT” for normal behaviour)… and then that value could be assigned to LFO as well… could get very wacky 
My Moog Sub37 can do this, it’s a great feature! I used to love doing this exact thing with a Dr Rhythm and an SH101.
Well…as I wrote…I’ll love this feature if ever happens.
Anyway…thanks for the proposition and huge thanks for what already happened after your beta thoughts…slice to fader and trig conditions are huuuuge!!
I owe you a lot!
Dont forget to give me a buzz whenever you’re around Salento… 
“step advance” has been crossing my mind numerous times. would def like to see this implemented.
what I would love to see in any sequencer - whether it be elektron or not - is being able to to tweak sequence start/end, play direction, loop points, time stretch…just like any sampler treats audio. maybe some of this is possible on a circlon?
…XziBit would have to treat us to some sequences to trig some sequences to achieve this I suppose…
Right, I’ve often thought it be great to be able to run the tracks independently backwards or back and forth… Especially if you could switch it as it’s going which ought to be the way Elektron would do it…
I’d propose that having these separate type of trigs ‘super trigs’ ‘macro trigs’ ‘step modifier trigs’ ‘step advance trigs’ or whatever they may end up getting named if implemented, they should be separate from the main track trigs, and that they can be assigned various attributes like skip x fwd or back x times, repeat x times, only play step if value is between x and y, don’t play if value is between x and y, play and modify x parameter by x amount, and so on.
to add to this - I’d love if elektron could get ‘plays free’ working as intended on the OT (quantize doesn’t work as it should, amongst other flaws). now that they undusted and cracked open the OT sequencer code again with trig conditions etc, they might be considering it? what do you reckon @elektron ?
^ yes this. this would open the door to other features too I would think
Essentially it would put Elektron sequencers far above anything else currently on the market, it would for all intents and purposes allow the user to build their own sequencer, and by having it separate from the main triggers it both allows greater flexibility and the option to not use it when not required, (just like TRC) so you could have regular tracks, plays free tracks and this new type of track. The master length parameter in scale setup could still override it to keep things from getting chaotic when changing patterns.
In the scenario where trig conditions are set in the regular trigs these would be taken into account by the new trig type, which of course could allow very organic, interesting and complex sequences to be created.
Elektron sequencers are already far ahead of anything else on the market. What your asking for is a source code rewrite of every single OS for an incredibly niche feature. I would rather they spent what would be considerable development time on something more appealing to all users. Many of us are happy with the plethora of options available already and don’t really want to over complicate. Most things can be accomplished with a little creativity with the current feature set.
What I really love in Digitone is that voice steaming is very well implemented, so that when you add a new note in the current chord / arp, it’s replayed exactly the same !
I’ve been waiting for this for years, had abandoned the idea, and I’m thrilled it’s now a thing.
This was an unexpected but very welcome advance in the area of
sequencer.
Now about the step recording : I use it a lot with the SH-01a and when I have something good I’ll redirect it towards my Elektron machines in live record mode.
Works great. But for me it’s way more efficient the Elektron way.
Maybe what you need is some kind of randomizer, that would establish a base to build upon.
That would be imo way more efficient (if you can even respect a predefined scale, even more)
well…I dont think @darenager is looking for randomization…at least I dont see this feature as a path to random sequences…not at all actually
I don’t know, for me it’s the closest I get from “controlled” randomization. Because I can barely anticipate the results.
But that might just be me.

I don’t understand exactly what you propose.
Can’t you do this with Plays Free tracks controlled by midi tracks, with midi loopback, TRC, arp, lfos…?
I see “step advance” as another layer to sequence “snapshots”.
Sure you can do that with TRC but without control on the pace/rhythm of those track trigs/snapshots
Though I am curious how you would implement this using the features we already have in OT.
It’s always interesting and amazing when we share this next deep level of technique on our beloved OT d^_^b