H9 noises

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    • #116631
      ryq
      Participant

      Hey, I’ve had issue with some noise for a while. Just kind of dealt with it. However, now it’s doing some worse stuff. Here’s video of it:

      https://youtube.com/shorts/Cu_-H9Wv-vc?feature=share

      Any suggestions?

    • #158475
      joecozzi
      Moderator
      Eventide Staff

      That is definitely not normal, but I don’t think it’s the H9. That sounds like USB or GPU ground loop noise. Are you connected to an audio interface or is the amp plugged into an outlet with other audio gear? Look at these videos for reference.

      https://youtu.be/lhzeCacFJbQ

    • #158482
      noodle1
      Participant

      I would say not the H9, for one, because I think you can see the signal light flashing on/off with the noise. That indicates to me something is getting in the signal path somewhere before the H9. Is this H9 wired PRE/POST, or stereo? What happens if you use true bypass?

      I would go through the connections first and eliminate any obvious sources of ground loops (non-isolated power supplies, grounds, etc.) or noise and start process of elimination between the H9 and front of the amp.

      Hard to say but sounds like a power supply, interference or grounding issue to me.  

    • #158486
      noodle1
      Participant

      The noise is still there even without DSP Bypass? RELAY (true) bypass mode should isolate noise to some degree. Using the same cables straight into the amp doesn’t reproduce the problem? Crackling and popping doesn’t sound right. Also I’ve had loud noise issues with PRE/POST routing before… In my case probably because audio grounds weren’t isolated (ground loops)…

    • #158484
      ryq
      Participant

      Only the H9 and amp are plugged in on an isolated outlet. Using the H9 provided walwart. The amp is fine with any other pedal similarly plugged in.

      joecozzi wrote:
      That is definitely not normal, but I don’t think it’s the H9. That sounds like USB or GPU ground loop noise. Are you connected to an audio interface or is the amp plugged into an outlet with other audio gear? Look at these videos for reference.

      https://youtu.be/lhzeCacFJbQ

      https://youtu.be/GbNyINuo-Uw

    • #158485
      ryq
      Participant

      Only the H9 with the provided wall-wart and the amp are plugged into an isolated outlet. No other pedals plugged in similarly produce the same problem.

      No audio interface or anything else. The pedal also does a thumping noise and crackles. All cables are good and the problem resolves with any other equipment other than the H9, so I’m sure it’s the source of the issue. The problem persists whether I plug it into a different outlet, a power conditioner, or the eventide/cioks pedal power for pedalboards.

      It gets worse when the bluetooth is connected, but still bad without anything connected that way. I typically use it pre/post but the problem persists if just straight in. I also usually run it as dsp bypass, but the noises are there when engaged in true bypass as well.

      noodle1 wrote:

      I would say not the H9, for one, because I think you can see the signal light flashing on/off with the noise. That indicates to me something is getting in the signal path somewhere before the H9. Is this H9 wired PRE/POST, or stereo? What happens if you use true bypass?

      I would go through the connections first and eliminate any obvious sources of ground loops (non-isolated power supplies, grounds, etc.) or noise and start process of elimination between the H9 and front of the amp.

      Hard to say but sounds like a power supply, interference or grounding issue to me.  

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