christianNoir

In your case, it could be a ground loop of you are using 4-cable method, or a power issue. Have you tried using the original adapter to power the pedal and nothing else? Have you tried the pedal alone, with no other pedals? Have you tried the pedal only in front of the amp or only in the fx loop (not both at the same time)? Hlw about an isolated power supply? Digital effects can do all kinds of strange things when combined with analog ones if you don't have your power situation right. Sometimes, you even need isolation transfirmer(S) on the sufio lines to fix things. Could be an amp issue or issues with the rest of the chain too. I didn't have any hum, just a high noise floor.

Anyone solve this? Try a replacement? Or is it ongoing? I first noticed it with the SD-1, but in DSP Bypass, mine still added noise to everything.

I'm having the same issue, either with an isolated Cioks power supply or original HX One adapter, even with the HX One turned off (maybe in dso bypass). However, unplugging the power to the HX One and the noise is gone. Feeding an HM-2, it increases the noise... But when I feed it through a SD-1, the noise is waaaay over the top. In fact, I thought the noise with the HM-2 was normal, but I was playing at low volumes, so I didn't notice it. After it struck the SD-1 and was so obscene, I tested with the HM-2 and it added its own noise, at a higher frequency. Anyone find a solution other than adding an isolation transformer to the chain? This seems to always be an issue when adding digital gear to analog rigs. I kinda wish the digital gear manufacturers would isolate their own gear right out of the gate. Thanks for any tips.