MOD Duo background noise level


#42

Hi mendo,

We have provided a hardware fix for the users who have asked for the fix. New batches already have the fix.

So yes and yes :slight_smile:


#43

Hi dwek

I would like very much if I could have that fix, thank you very much!

best regards
Bjarne


#44

hi @dwek!

what’s happening with respect to addressing the remaining kernel-related buffering noise, which is still audible (although greatly reduced) after the hardware fix? does the upcoming increased CPU power (in the Duo X and in the proposed Duo upgrade) allow running a kernel which fixes this?


#45

@plutek

We still need to check some things, but it is very likely that the new CPU does not exhibit this problem in such a prominent way.

We will have news soon.


#46

Hi @gianfranco,

I tried the hardware fix that @dwek commented, but the noise is still there (reduced, but still there), so I’m also really interested about what’s going on to fix the kernel buffering issue for the Mod Duo (not X) devices. So anything you can share about it would be really appreciated, thanks!


#47

So the hardware fix didn’t solve the problem?

I’m having these noise issues too, I suppose it’s the usb-noise thing.
(I’m using the ModDuo since yesterday my first time)
No way for me to send mine back as I’m out of warranty period already. (bought it second hand)

However, the solution AndyCap stated: with a HifimeDIY USB Isolator, it should work ?
Anyone else with these problems tested this solution?

I’m wondering if the Audioquest Jitterbug is doing the same thing?

Another thing: I’m routing my audio out to a Behringer UCG 102 link cable (audio interface) to get the sound to my DAW (Reaper). However, yesterday, after couple of hours doing that without problems, the Behringer interface stopped working (I’m using it already a couple of years now though). I’m wondering if the use of the ModDuo was doing any harm to the interface or not? I guess it was just bad timing.


#48

If you don’t want noise when recording with any device, you need to make sure you don’t have ground loop.

The better solution with the Mod Duo is to use it with bluetooth, and if you have a laptop just unplug the AC cable and work on battery.

Other else you need to invest in some USB isolator.

Another tips : dont turn your guitar in front of your computer when playing (or any electronic device), just do the test you’ll ear a big difference of background noise.

If after all that you still hear noise, it must come from the mod duo…


#49

Alright, bluetooth is an option, although I don’t like to have too much radiation. I wired my house to make the use of wifi unnecessary too.
USB Isolator is on it’s way, probably by the end of next week. Will let you know if that’s helping.
The noise is only irritating when recording on computer, but it’s nearly a problem when I just put the output through a regular micro-hifi-chain (which isn’t the purpose) but meanwhile I can play and the ModDuo sounds pretty good. I still have to find my own sounds through the hundreds of pedals…

As for the audio interface to connect on the computer, I’m going to work with a Focusrite Scarlett Solo. (should work fine under Linux)
Couple of years ago, when I began this hobby, I bought the cheapest option first: the Behringer UCG 102, it always worked perfect though, but now this product doesn’t get sold anymore in my region, except in one shop where they still have one item… Although the guys in some shops are telling me now it’s not really good material and lots of broken devices are returned, and never repaired by Behringer, no after-sales service. So I won’t take the risk buying that last item another time and upgrade with the Focusrite… :slight_smile:


#50

If what you have is ground antenna (loop) issue then the isolator may work. It all depends on where the loop is. If you are finding that unplugging the USB gets rid of the noise then it’s probably there and an isolator should work. But ground loop can be a very difficult to solve. I thought I took all precautions to not have any loops but somehow I did. I had a great system and then when I plugged in one new piece of gear it all went to shit…
Sometimes it’s just one issue and sometimes it’s multiple issues…

One noise I had was resolved by using balanced cables between the MOD and my mixer/interface. There must have been some noise getting picked up by the cable… bad cable or RF around that area.

Some computers are better at isolating peripherals than others.

Good Luck!