Noise issue through audio out (even with USB charging disabled and no fx on master)

OP-1 Help
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1
Anyone have any advice on this? I love this thing and it's sounds great on headphones but it's always a bummer when I plug into my Duet 2 from the audio out... There is always a bunch of noise (but it isn't there on headphones). I've tried connecting just the 1/8" Y-cable to the inputs of the duet and I've tried connecting the OP-1 with both USB and 1/8" and disabling USB charging but its noisy either way. Anyone have any ideas? Any help is greatly appreciated.

Also, a separate but related question - Is it possible to use the op-1 normally and send the audio signal over usb? That way you could toggle between using it as a control surface and as a stand-alone synth.

Thanks a ton to anyone who responds.


2

No audio over usb man. I have a bit of noise when I use my Saffire Pro40 but not on my m-audio transit card. I’m curious whether or not it ‘likes’ sound cards that are getting AC power. Idk dude. I usually save a piece of tape for single tracks to export before I start bouncing. That way I can mix in ableton or protools if I want.

3

Thanks. Gotcha. Yeah, guess I was just wondering if that was just the way it was or if there’s anything I can do to minimize the noise.

4

Are you using extreme drive settings or anything else strange in the master fx?

5

Plugged into my Focusrite Scarlett 18i6 the OP-1 is very quiet, so it is possible with certain audio interfaces.

6

So I think I figured this out-
basically the op-1 has just a little bit of noise … With anything… But it’s not deal breaking as long as the volume is up all the way. I think I was just plugging in with it wherever I left it with headphones on and added more gain on the interface, which just raised the noise floor. All good now.
thanks for the responses.

7

This is my experience with noise:

No usb :Almost no audible noise
USB connected with charging disabled :Some audible noise
USB connected with charging enabled :ZOMFG duck for the laz0rs!!!

If need be, you can always contemplate on just importing tape tracks with 0 noise.
8
This is my experience with noise:
No usb :Almost no audible noise
USB connected with charging disabled :Some audible noise
USB connected with charging enabled :ZOMFG duck for the laz0rs!!!

If need be, you can always contemplate on just importing tape tracks with 0 noise.

^^^^^ YUP ^^^^^


went through a couple different connection options to figure this out but sure enough the noisy signal is definitely coming from the usb––OP-1 cable. I’m using a Duet as well and thought it might have been the 1/4" adapter…

9

even if drive is a little bit on you get noise. turn off completely and also turn down the input red knob when in tape mode incase of effects like nitro.

10

I get the noise when the OP-1 goes directly to the mixer, not to the soundcard


I wonder if it is safe to try this trick: http://forum.moogmusic.com/viewtopic.php?f=11&t=15694&hilit=usb+noise+minitaur

11
usb isolator
This usb isolator kills ground loop noise.
usb isolator

http://hifimediy.com/usb-isolator
12

One thing is quite strange is that in my unit I am able to turn off the noise almost completely when the OPT mode is enable in mac, but win Windows it works for a few seconds and the noise comes back…

Is anyone else able to try this?
13

Had a similar experience. tried several cables / adapter / soundcards / etc.

Solved the issue with some cables and the other day the noise was back again.
The only (nearly) noise free solution I came up with is a DI BOX in between.
Don’t just buy one - try before. DI-boxes can also be tricky (Some DI-boxes are more or less fake)