H90 Background Hum/Noise

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    • December 16, 2024 at 1:01 pm #187042
      simosaba
      Participant

      Hello,

      a friend of mine and I both have an H90 and we noticed on both units an always present hum or noise in the background (even when the pedal is standalone in a chain going from the guitar to the pedal and directly to the amp). This hum can be very annoying at times. What could the problem be?

      And yes, the hum is present even when a usb cable is not connected. Because this is a digital pedal, it surprises me that this noise is so prominent.

      Thank you

    • December 16, 2024 at 4:39 pm #187048
      joecozzi
      Moderator
      Eventide Staff

      A few questions:

      Does this happen with every H90 program or only specific ones?
      Are you using factory default settings or have you changed the operating levels of the H90 for any reason?
      Can you trying using any of the INIT programs on the User 2 list? These consist of two THRU algorithms.
      Is the noise still present when you bypass the H90?
      What kind of a guitar are you using; does it have single coil pickups?
      Is the H90 connected to a different power outlet than your amp is?

    • December 17, 2024 at 5:47 am #187064
      simosaba
      Participant

      Thank you for answering.
      This happens with every H90 Program. I even tried, thanks to your advice, using one of the INIT Programs with the two THRU algorithms but the hum barely changes. Of course, it is much more intense when a normal Program is engaged. If, for instance, a Polyphony algorithm is active, it even tends to harmonize with the noise. I’ll try and attach pictures to show that all inputs and outputs are set to the normal factory default setting of Inst.

      The noise is still present when I bypass the H90, either when the P Bypass is set to Relay or to DSP (when set to DSP the noise is more intense than when set to Relay when bypassed), but if I connect my guitar directly to the amp the noise is basically nonexistent, so it must come from the H90 (even when bypassed).

      I have tried using multiple guitars, both with Humbuckers and with Single Coils, and like I previously mentioned a friend of mine reported the same issue to me.
      Yes, the H90 is connected to a different power outlet than my amp.

      I don’t think I can upload videos right? If I could, I would show you the difference.

      Thank you

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    • December 17, 2024 at 7:44 am #187070
      joecozzi
      Moderator
      Eventide Staff

      Hi Simosaba,

      None of this sounds normal so I would suggest contacting support@eventideaudio.com for more troubleshooting. You can send videos of the noise including the harmonizing of it, like you mentioned.

      According to the statements below, it’s my opinion the noise already exists in the system. Please link to this forum thread in your message to Support.

      simosaba wrote:

      This happens with every H90 Program. I even tried, thanks to your advice, using one of the INIT Programs with the two THRU algorithms but the hum barely changes. Of course, it is much more intense when a normal Program is engaged. If, for instance, a Polyphony algorithm is active, it even tends to harmonize with the noise…The noise is still present when I bypass the H90, either when the P Bypass is set to Relay or to DSP (when set to DSP the noise is more intense than when set to Relay when bypassed).

      A few more questions:

      What kind of an amp do you have?

      Are you running it clean like a pedal platform or is it dirty to start with its preamp providing a little overdrive?

      If you’re running it clean, do you have an overdrive or distortion pedal you can place in between your guitar and the amp; is the noise still there?

      If you have the means, can you connect your H90 outputs to an audio interface and record the outputs to see if the noise you experience is still present? Preferably, an interface with instrument inputs, otherwise you’ll have to connect it to line-level inputs and switch the outputs of the H90 to line level as well. Just trying to determine if taking the amp out of the equation helps alleviate the noise.

      How would you describe this noise, is it like white noise or is it a 60 hz cycle hum?

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