Doubletrigs on OP-Z


I know lot of people jump on hardware, but yea maybe a software revision could smooth out the trigs.


Yeah it really seems like a problem with (or lack of) debouncing on the button inputs, which can be remedied in software.


idk on the double-triggering OP-Z i had, it wasn’t necessarily doing it right when i pressed a key… sometimes the second trigger would happen on sustained presses after i’d been holding it for a bit. that seems like faulty hardware to me… not easily remedied in software.


Im continuing to have some double trigs but it is very seldom and seems to happen more so when I first turn the opz on. Opz is about two weeks old.

But, i’m really curious if anyone is having this problem so I’m asking again:

First, when attached to headphones or aux cable or whatever, when I turn the opz on there is a very faint, short, ground hum. Which is understandable. However, sometimes that ground hum multiplies and gets really loud and the opz freezes. All the pattern lights turn red. I have to restart the opz for it to work. Doesn’t always happen. And seems to happen most when I’m using headphones.

Anyone else getting this loud noise sometimes or should I contact the seller?


Maybe debouncing is the wrong word, but some kind of “release” time on button presses would probably remedy it.


Hello all,
I was wondering if anyone who’s managed to make a return of their op-z thus far could tell me what/where exactly is the “reference number”? I can’t seem to find anything explicitly saying that on the receipt or the shipping confirmation.


on the back of the Package and within the App.


Hello friends. The other day my OP Z was in a case and it stays 15 minutes in the sun. When I saw that I took it and put it in the shadow. I feel since then the double triggering is more often. Does any of you put their OP Z too many time in the sun or in a hot situation ? Maybe this double/triggering could be a problem with the membrane keyboard and hot temperatures ? Hope I can be understand, because english is not my main language.


I’ve got a second hand op-z that has this issue and seeing as how I have no warranty I opened it up the other day and took a look inside. I’m wondering if the doubletrig issue is just that there’s too much of a gap inside, so when you press down a key its just not pressing down quite far enough? So its like you’re getting an unreliable connection? I’m wondering if I put a thin layer of something like plastic transparency film in there the same size as the membrane for the keys it might just lift it enough for the keys to press down more reliably? I’m going to give it a go when I get some transparency film, but I wondered what others thought.


PLEASE give it a go. you may be the guy that helps us all. mine doubles on some notes. contacted te. they said shoot a short video. i am shooting tonight. and will send to them when done. i reallly dont want to give up the device and all that is stored on there right now.


This picture from TE’s instagram today gives an idea about the keyboard construction, but unfortunately it is not hi res enough to confirm whether the buttons are standard tactile switches or something else…


Okay I thought I had some transparency film and I had another look and found it this morning. (I used it some years ago to come up with something called the kgridmod, which was an attempt to make using the korg kaossilator easier.) When my toddler is napping or otherwise entertained today I’ll have a go at this.

I’ll try and get some photos while I’m at it.


Unfortunately you will not be able to get underneath the keyboard because that flex cable where the switchs rest on is fixed in place permanently, i.e. it is not removable, according to what we saw in the OP-Z teardown pictures.


Okay I opened it up again and put a piece of transparency film inside between the underside of the brown keyboard membrane and the bit that sits underneath. I reassembled and it didn’t make any difference! I opened it again and added a second layer of the film, but still no difference. I still get doubletrigs. So I’ve got two layers of transparency film in my op-z for the time being until I have the time to try something else. I just hoped that squeezing the keyboard membrane up towards the keys might mean I’d get a more reliable contact when I pressed a key.
@punji yeah I’m not going to try and disconnect the keyboard membrane, too risky!


If you press a key, can you actually see the flex membrane sagging a bit?


I’ll try and open it up again this evening and report back. I’ve not had a chance to play with it much since adding the layers in, but I’m wondering if maybe it’s not doing it (doubletrigs) as bad as before?


super insane but really nice that you’ve done that. gives a lot of troubleshoot information.

from time to time I think they should have done it in a black painted op-1 case with the same Hardware (except the disks) as OP-1 but an added module slot and such. what a misery that the most playable part is such faulty sometimes.

OP-1 as a Controller is nearly the same but that same height and feel…in black…

i think doubletrigs are rare! my new one never ever had a doubletrig, fingers crossed :crossed_fingers:


It doesn’t visibly sag, but you can feel it move slightly from the underside. On mine it’s the keys over the module blank that are the worst. I’ve been looking at my module blank and can see that there is a bit of plastic moulding that wasn’t trimmed away fully, so that it was sitting a little high and wasn’t fully recessed flat with the surrounding plastic. I’ve trimmed the module blank so that it sits flatter/flush now and I’ll do a bit more experimenting soon.

Ultimately I don’t really get this problem if I press keys very quickly and very firmly and release the keys sharply without lingering on them, but it doesn’t feel like a very relaxing way to make music…


Well I’ve done some more playing this evening and removed the 2 layers of transparency film. As I have this mostly on the keys over the module blank I’ve added a bit of card cut to shape plus another bit of transparency film! to get it just a touch thicker. These sit under the module blank and this does seem to be helping a lot. This isn’t going to help if I buy a module though…


I sent in my video to TE today, lets see how long they take to get back to me. shift button and lower c are triggering multiple times. it seems that the most used buttons are affected first. it could be spreading.