@chet: have you tried erasing the tape fully? Sometimes there are invisible tape segments left over from editing; I would try deleting the 4 tape .aif files via USB and see if that does anything. Otherwise, I’ve occasionally had clicks from String and Dr. Wave synth engines… could that be it?
@chet: have you tried erasing the tape fully? Sometimes there are invisible tape segments left over from editing; I would try deleting the 4 tape .aif files via USB and see if that does anything. Otherwise, I've occasionally had clicks from String and Dr. Wave synth engines.. could that be it?It definitely sounds like your clicks/pops aren't the same as what everyone else is talking about (which pertains to clicks at the end of looped sections)
@chet think we’ve been having different problems. Though I have had (very occasional) random artifacfs during long passages of synth recording before too. Can’t remember the circumstances. Think it was mostly while using String. Also can’t remember whether it was due to peaking the record levels. I’ll check out those presets you mention and record a long passage here and let you know if I get the same issues.
Edit - I just has quick go with those presets. No problem recording 2 minutes of Dissolver. Harm A Chord was kind of clicky without me even going to tape tho. Especially if I hold chords. Sounded almost like occasional vinyl crackles. Badly trimmed sample loop points maybe? Not sure if these are the same clicks/pops you’re getting or you’re getting louder ones? Do you have master fx and any other CPU hitters activated?
Have you tried tweaking the presets’ synth parameters and recording levels etc and see if you can smooth things out that way? Though from what I remember I has a patch in String when I first got my OP that would seemingly randomly produce super loud clicks/pops and can’t remember if I figured it out/fixed it? Might have just been bad programming on my part. Or Maybe it’s a cpu thing, which is obviously more of a concern. I’ll try to find some time to check it out again later…
@callofthevoid Thanks for your ongoing thoughts.
Also, Wondering if anyone has gone from the BETA version BACK to the official 14203 version ?
When I said hardware issue, I meant a fault. You are right, no one I believe is experiencing this. Is your unit under warranty?
I hear pops and clicks on loop points occasionally and crackles when overloading the meters, usually when using unison. Never had any issue with cpu overload.
I have reverted to old OS, no issue and probably worth trying.
@chet maybe make a quick video showing your exact settings/preset/notes you’re playing/arp settings etc and others can mimic and see if they get the same problems. Just to rule out it being a hardware issue or not.
Also, like I mentioned, I get crackles here too when I hold chords down on the Harm A Chord patch. Seems like it’s probably a nonzero crossings loop point in the synth sampler settings? Have you added any reverb or delay? That could maybe explain the crackles getting exponentially worse possibly? Or maybe that preset has some kind of slow LFO slowing increasing something?
Harm A Chord is a synth sampler patch which loops from the blue marker on the wave form to the white marker. I also get a pop if I hold a continuous note down on that patch, I guess because there’s an abrupt jump from the end point to the start point. If you hold down a two note chord, you’ll have two loops of the sample running and they won’t be in time with each other, so the pops will appear more random. Do you also get pops with plain synth patches? (Note: I have heard certain settings of String make the odd pop)
Oh man, I got an issue. I reverted back to the last official OS 14203 but when I do a restart I keep getting this message. 
Reinstall new beta, save those patches as snapshots, save to computer, reinstall old OS, load up snapshots and you’re good to go.
Could that startup issue be linked to having snapshots that include Arp still saved on the OP-1? You might need to get rid of any snapshots that include a reference to the beta OS features.
The snapshots are totally independent of sequencer settings. Good point though, could be some slump settings in there maybe?
Ah yes, that would make sense 
Sorry not sure what a snapshot is. (rookie)
@chet
Slump is a synth engine.
Harm A Chord is a Sampler preset/patch.
Sampler is one of the ‘synth’ engines. But isn’t really a ‘synth’, it’s a sampler.
Snapshots are any user synth engine settings that you have tweaked in to a sound that you like and saved on OP. You then have to connect to computer to name/save/organise them.
Harm A Chord is a Sampler preset. And that preset has some issues with pop on the sample loop points I think. So holding chords will give you a bunch of seemingly random clicks each time the sample loops. Which varies in speed depending on which note you’re playing. So that might have been the problem all along maybe? Though like mentioned, it isn’t totally unheard of for very occasional clicks/pops when using synths. ‘String’ synth is especially easy to force to do this. And in the beta ‘slump’ seems to max out the cpu so that might also be prone to it, though I don’t seem to be getting any issues from Slump beside the graphics lagging when recording to tape.
Do a factory reset .
I got an old OP1 and it would crash.i reset it and it is fine.