Yes, the “mute-unmute” track is optional. I believe I did that because in the “midi-loop” scenario, I had the track playing back the recording in real time because of the microtiming, I guess) so it doubled the live sound. Looks like in this more direct scenario it’s not needed.
Seems necessary is the playback continue during a new recording.
Disarm shouldn’t work for that.
Yesterday I made tests with one shots and midi plays free track, no microtiming on the Flex.
Seemed to work without drift
QREC = PLEN
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Something else but related: Now that I have a nice multitrack looper set-up, with lots of extra posibilities that make this solution competitive against a Boss RC600 (which I had in mind), at least for my use case, I’m still facing an issue that I remember having posted about years ago: what’s the best way to clear all recording buffers at once? I mean, I’m doing my thing, filling up my recording buffers, finish the performance, and then want to move on to the next piece, starting fresh. Reloading parts doesn’t clear the buffers, going into the AED and clear each buffer individually is a drag when on stage (or even when rehearsing), so the only thing I can think of is reloading the project. Am I correct? Nobody figured out the magic key-combination that does a global recording buffer reset yet?
Changing memory parameters does it. Not ideal.
Changing reserve length does it so you can set it to a new value and save settings without revert to previous values.
(Reverve R1, Reserve Length 0s > 1s for instance, back and forth each time to want to reset buffers).
A dedicated reset pattern, recording no sources on all buffers.
Like Bank 16 pattern 16…
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Which of these would be MIDI controllable?
For the way I use the buffers I have a scene (or scenes) that clears them. It is unfortunately a real-time action.
No midi for memory, nor clear slots.
You can load a “silence” pattern.
Do you mean a scene that allows to record silence ? Could you elaborate ?
Nothing more complicated than turning down the VOL or XVOL parameter so it writes silence to the buffers that are recording.
I guess you could dedicate a Part to clearing the buffers and call it on a pattern. No input, just a trig long should wipe them. I’ll play with that idea.
So this works for SRC3 sources only. And you have to trigger all recorders ! How do you do ?
Arm All + one shot trigs would trigger all…
I think I prefer the “silence” pattern option with rec trigs and silent settings ready. Can be quick with a 2 steps pattern !
Or Memory settings mod.
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Yes, this is probably the most straightforward. Dedicating a Part to it might make sense in some weird use case.
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In much of my use my recorders are always recording.
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I always associate a part with a pattern, but why not, if it works.
There is a bug with rec settings and part changes so I am particularly mistrustful with it.
Don’t you turn off Octatrack sometimes ? 
And ruin my glorious eight clickless loops?!?
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I’m confused about setting this up. I think the recording buffer settings (including sources) are specific to a part, not a pattern. How do you set it to record no sources within the same part. I tried to do it on the record trig, but with no sources selected tge trig disappeared.
Yes. I am not talking about a pattern without part changes, but I prefer to use a pattern with a different part instead of just change part.
Also because part changes take effect with trigs, and per track (an fx tail can last even with part change with different fx, until there is a trig. Same for samples)
Oh! I thought you had a way to do it on a new pattern without changing the part.
As you said :
If you don’t use all inputs you can eventually assign rec trig to unused input and reduce gain to min (this is a project setting : /)
Or plock VOL ? (When you use SRC3)
That’s probably the simplest.
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Interesting suggestions here. I’ll try to set-up a one-footswitch command that’s does everything needed using a stack of midi commands, based on @sezare56 's suggestion of a pattern with one shot trigs recording silence. Just need to figure out the whole stack…
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If you use a dedicated pattern to record silence you don’t need one shots that you’d need to arm…
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You’re right. I’ve set it up, it works. Definitely the best way to silence all recording buffers, which is great in this use case. I also managed to set up a footswitch controlled tap tempo using a Retrokits RK-002 cable (that’s a must-have for anyone who likes to mess around with midi: it allows to solve lots of problems, and create new ones 
And now a bit of venting: seriously, why does the Octatrack needs to GUESS a tempo for a sample it has recorded itself: it had the tempo, knows the length… and then it GUESSES but allows only between 85 and 170 BPM otherwise it’ll assume the tempo is wrong and will playbacjk at half speed… WTF! There’s a musical universe at less than 85BPM!
OK, apologies for that 
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