Problem with noise when using USB to PC

Discussion in 'Zoom G1on/G1Xon' started by lestat57, Feb 9, 2021.

  1. lestat57

    lestat57 New Member

    Hello guys.

    Any idea how could I solve the following issue please?

    When I have the Zoom G1Xon multi effect connected to my computer via USB (audio output to my guitar amp), I get quite a lot of static noise, high-frequency buzz, fuzz and hum, which gets so much worse when I switch to the lead channel on the amp itself. Not only it adds a layer of noise over the sound, but it even impacts the underlying guitar tone quality noticeably.

    When I use the very same USB cable and plug it into the old phone charger directly to the wall power socket instead, the noise disappears (also disappears when I power the G1Xon via the AC/DC power adaptor).

    I tried to touch the metal PC case to see if I could ground it, but the noise remained the same. Also tried powering the device via AC/DC adaptor and at the same time just connecting it to PC via USB. All fine and dandy but as soon as I plugged it into PC USB slot the noise came back. I tried using different USB inputs on PC as well as trying a different mini USB cable altogether, to no avail.

    Now, if I only used the USB cable to power the device, it'd be a non-issue since I'd just use a different power input. But since I'd love to use the G1Xon with Tonelib on my PC, that's not really a solution.

    Any ideas guys?
     
    Last edited: Feb 9, 2021
  2. AJRtlib

    AJRtlib New Member

    Hi, I had the same problem, the noise should be coming from the PC ground. Try Powering the PC without the ground connected, probably you will have to change the plug or do some work on it to remove the ground connection. If on a laptop, try with battery only (no ac adapter) and check if the noise disappears.
     
  3. stigma

    stigma New Member

    If you have a laptop use battery only power.
    I succeeded also using a USB power bank designed for smartphones, no noise at all.
     
  4. Jair Seixas

    Jair Seixas New Member

    Too bad... happens here.