What can the OP-1 and OP-Z do together?

OP-Z
#21

Which one are you using as the master clock?

And how are you listening to them both? Are you feeding the OP-Z intomthe OP-1?

#22

The OPZ is the master clock.
Then the outputs are put together through a small mixing table (“Maker Hart” brand).
It turns out that I managed to synchronize them both perfectly with a firmware update… BUT… now I have strong noise interference : https://www.youtube.com/watch?v=4JB33vgwxbA&t

#23

Excellent. I tried using a Roland Go Mixer to mix the two together and it worked fine.

I need to look at the MIDI settings for both. Pressing Play on either device starts both of them right now.

#24

You’re lucky…
Now, one can try another thing that really shows how much noise interference the OPZ adds to OP1 :

  • plug the output of OPZ to the Mic Input of the OP1 (so that you can record the OPZ to an OP1 track), you will
  • plug them together with midi (USB) so they synchronize with MIDI
  • activate the line-in to hear the OPZ via OP1

Normally you should get a crazy interference of a high pitch noise, over the OPZ sound…
:frowning:

#25

Is this related to the opz as usb host is charging the op1? There was a feature to turn of loading on the opz but I guess the other way around that it is not charging with connected USB.

#26

You can turn off USB charging on both op-1 and op-z to help. On mine I still get some buzz. I bought a ground loop isolator off amazon and it sounds perfect.
If you route your audio from op-1 and op-z to a mixer instead of from the op-z to the op-1 you won’t get the buzz when the two are connected over USB.

#27

Well, I wish you were right for all the mixers… on the video, I show that the mixer I have doesn’t prevent such a thing. I tried on a professional mixer and although the buzz is lower, it’s still there and to my opinion no acceptable.
I guess I will have to check for the loop isolator… USB one (people complained that the sound loop isolator deteriorates too much of the sound quality, removing frequencies…)

#28

Sorry I didn’t watch the video. I am using the exact same mixer and don’t get that. It might be the cables you are using? I don’t have that usb to mini usb cable but I thought about buying it but have not because so far I have tried buying two different cables off amazon that said they could be used for data that don’t do anything. The straight through just usb-c, the apple usb-c adapter and the TE cables are the only USB cables I have had any success with.

#29

Good to know ! Thanks
Could be the cables… I will try more.
Now, I suspect my OP1 is responsible. I bet it didn’t get properly shielded…

#30

Final note : I think my issue on the buzz sound is resolved. And yes : I had to cancel the USB power on OP-1 and OP-Z (“Screen” button + E2 Note).

Now, looks like I can’t put the OP-Z back to USB powering… “Screen” button + E2 Note doesn’t seem to toggle it back… but it’s another story :wink:

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